{"id":13413,"date":"2021-11-10T09:56:50","date_gmt":"2021-11-10T14:56:50","guid":{"rendered":"https:\/\/ventilation-maximum.com\/?p=13413"},"modified":"2023-11-08T08:38:37","modified_gmt":"2023-11-08T13:38:37","slug":"active-vs-passive-roof-vents","status":"publish","type":"post","link":"https:\/\/ventilation-maximum.com\/en\/attic-ventilation-tips\/active-vs-passive-roof-vents\/","title":{"rendered":"Difference between Active &#8211; Passive and Mechanical vents"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"13413\" class=\"elementor elementor-13413\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cbbc9f1 elementor-section-height-min-height elementor-section-full_width elementor-section-height-default elementor-section-items-middle\" data-id=\"cbbc9f1\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-50e0982\" data-id=\"50e0982\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-239fbd7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"239fbd7\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-9d6867d\" data-id=\"9d6867d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7fd4798 elementor-widget elementor-widget-heading\" data-id=\"7fd4798\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">The Difference Between Active, Passive and Mechanical Roof Ventilators<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-eeb5ae6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"eeb5ae6\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2521e4d\" data-id=\"2521e4d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5c2b12d elementor-widget elementor-widget-text-editor\" data-id=\"5c2b12d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\">Attic spaces need to be properly vented to avoid several undesirable outcomes. If you haven&#8217;t had the chance to read our previous article on<a href=\"http:\/\/&quot;https:\/\/ventilation-maximum.com\/en\/ventilation-guide\/understanding-attic-ventilation\">\u00a0attic ventilatio<\/a>n, take a few moments to familiarize yourself with the concept. The roofing industry is currently filled with several different products regarding attic ventilation but how does each product work, what are their pros and cons and ultimately, what is the best long-term investment for your roof?<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-574df77 elementor-widget elementor-widget-table-of-contents\" data-id=\"574df77\" data-element_type=\"widget\" data-settings=\"{&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;bullets&quot;,&quot;icon&quot;:{&quot;value&quot;:&quot;&quot;,&quot;library&quot;:&quot;&quot;},&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;,&quot;h6&quot;],&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h2 class=\"elementor-toc__header-title\">\n\t\t\t\tTopics of Discussion\t\t\t<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__574df77\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4bfda43 elementor-widget elementor-widget-heading\" data-id=\"4bfda43\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Passive ventilation <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1518c03 elementor-widget elementor-widget-heading\" data-id=\"1518c03\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How does passive ventilation work?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18a3bc2 elementor-widget elementor-widget-text-editor\" data-id=\"18a3bc2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"><span lang=\"EN-CA\" style=\"font-size: 12.0pt; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin; mso-ansi-language: EN-CA; mso-fareast-language: FR-CA;\">The first category of available ventilators and probably the most common in north America is passive vents. What is a passive ventilation?<\/span><\/p><p>\u00a0<\/p><p class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"><span lang=\"EN-CA\" style=\"font-size: 12.0pt; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin; mso-ansi-language: EN-CA; mso-fareast-language: FR-CA;\">Passive venting, also know as natural ventilation, consists in letting naturally rising air move through an attic space and escape through passive vents without the use of mechanical ventilation systems or roof ventilators creating suction effects (active ventilation vents).<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18b9160 elementor-widget elementor-widget-heading\" data-id=\"18b9160\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Key Features of Passive Ventilation <\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6718c60 elementor-widget elementor-widget-text-editor\" data-id=\"6718c60\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"><span lang=\"EN-CA\" style=\"font-size: 12.0pt; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin; mso-ansi-language: EN-CA; mso-fareast-language: FR-CA;\">Passive ventilation systems are usually composed of soffit vents dedicated to the entry of fresh air into the attic and passive vents, located on the highest point of the roof, dedicated to letting the naturally rising hot and humid air to escape outside. A passive ventilation system may also rely on wind driven ventilation (winds coming in cross-sectional directions to the soffits) to enter from the soffits and create a positive pressure in the attic, pushing the heat and moisture upwards to be evacuated.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"><span lang=\"EN-CA\" style=\"font-size: 12.0pt; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin; mso-ansi-language: EN-CA; mso-fareast-language: FR-CA;\">To better understand how to apply passive ventilation products, we must first understand building code requirements on attic ventilation. Building codes across North America refer to attic ventilation in terms of net free area (NFA) of ventilation to apply to a given roof in regards to the size of its insulated ceiling surface area. The bigger your home, the more openings (NFA) you\u2019ll need to properly ventilate your roof. Introducing a passive ventilation system to a roof implies that you, or the builder, are fulfilling building code requirements in terms of NFA for both intake and evacuation purposes with products that do not offer any additional venting value. We will see what these extra venting values are later in this article.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"><span lang=\"EN-CA\" style=\"font-size: 12.0pt; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin; mso-ansi-language: EN-CA; mso-fareast-language: FR-CA;\">A passive vent offers a specified amount of net opening for natural ventilation to allow heat and moisture to escape the attic. They can be installed on the roof and on walls as well. Here are examples of passive ventilators:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-63e14ab elementor-widget elementor-widget-heading\" data-id=\"63e14ab\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Ridge Vents<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-490ed22 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"490ed22\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-18a7569\" data-id=\"18a7569\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4ac7ecf elementor-widget elementor-widget-image\" data-id=\"4ac7ecf\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"233\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image3-300x233.png\" class=\"attachment-medium size-medium wp-image-20856\" alt=\"Ridge Vent\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image3-300x233.png 300w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image3.png 540w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-048e1c3\" data-id=\"048e1c3\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cd5e21b elementor-widget elementor-widget-text-editor\" data-id=\"cd5e21b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tA ridge system is positioned linearly on the ridge of the roof and is good for all types of attic spaces (open and cathedral). A ridge ventilation system offers a uniform opening along the entire length of the ridge allowing heat, humidity, and stale air to escape by natural means.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-a9333a3 elementor-widget elementor-widget-spacer\" data-id=\"a9333a3\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cb5b5d5 elementor-widget elementor-widget-heading\" data-id=\"cb5b5d5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Shingle or Turtle Vents<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-7bfe59e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7bfe59e\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-cbe6b80\" data-id=\"cbe6b80\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cb0c302 elementor-widget elementor-widget-text-editor\" data-id=\"cb0c302\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Shingle vents are single type units designed to be positioned uniformly at top portion of the roof to act as natural ventilation escape points. They work well for open attics but are not recommended for all type of attics such as cathedral attics with closed trusses. A cross ventilation roof structure would have to be added to the roof to allow the fresh air to move in all directions in the attic to later be drawn out through each individual shingle vent. (a cross ventilation roof structure is composed of wood pieces installed perpendicularly to the roof rafters raising the roof and allowing air to flow through each roof channel in all directions).<br><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-fed5ade\" data-id=\"fed5ade\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0e45226 elementor-widget elementor-widget-image\" data-id=\"0e45226\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1-300x300.png\" class=\"attachment-medium size-medium wp-image-20854\" alt=\"Turtle Vent\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1-300x300.png 300w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1-150x150.png 150w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1.png 700w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-d33fdb6 elementor-widget elementor-widget-heading\" data-id=\"d33fdb6\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Gooseneck Vents<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-5788fce elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5788fce\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-42f8943\" data-id=\"42f8943\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6b28123 elementor-widget elementor-widget-image\" data-id=\"6b28123\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1-300x225.jpg\" class=\"attachment-medium size-medium wp-image-20852\" alt=\"Goose Neck Vent\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1-300x225.jpg 300w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1-1024x768.jpg 1024w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1-768x576.jpg 768w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1-1536x1152.jpg 1536w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image1-2048x1536.jpg 2048w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-78da330\" data-id=\"78da330\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c9da63a elementor-widget elementor-widget-text-editor\" data-id=\"c9da63a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tGoose neck ventilation systems are most often seen on commercial flat roofs rather than single family houses. These ventilators are often oriented in different directions on the roof, using wind speed and direction to allow outdoor air to enter the attic space. A positive pressure is created and hence pushes out, through natural driving forces, heat from the indoor space.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-852a95a elementor-widget elementor-widget-heading\" data-id=\"852a95a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Gable Vents<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-366be7c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"366be7c\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-9c68330\" data-id=\"9c68330\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-525cbcb elementor-widget elementor-widget-text-editor\" data-id=\"525cbcb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A gable ventilation system is composed of wall louvers and rely entirely on wind driven ventilation to bring fresh air in and push heat and humidity out of the attic space. Gable vents can also be combined with other passive ventilation units to evacuate warm air from the attic space.<br><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-7dd348f\" data-id=\"7dd348f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-eaa29f2 elementor-widget elementor-widget-image\" data-id=\"eaa29f2\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"522\" height=\"276\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image4.png\" class=\"attachment-large size-large wp-image-20858\" alt=\"Gable Vent\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image4.png 522w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/Image4-300x159.png 300w\" sizes=\"(max-width: 522px) 100vw, 522px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-d2afcfa elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d2afcfa\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-a27170f\" data-id=\"a27170f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c7cec06 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c7cec06\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f62d5ad\" data-id=\"f62d5ad\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cfbd87f elementor-widget elementor-widget-heading\" data-id=\"cfbd87f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Mechanical Ventilation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-e2c0a11 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e2c0a11\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-bf73f53\" data-id=\"bf73f53\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7fe3cb7 elementor-widget elementor-widget-text-editor\" data-id=\"7fe3cb7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The second category of vents are mechanical ventilators. These systems are composed of air vents with moving parts that require electricity to function. They can be composed of solar powered vents or direct power source ventilators. These ventilation systems work in the same manner as passive or active type ventilators except that the roof ventilation is done through power vents pulling moist air out the attic space at a given volume (CFM). Fresh air comes in from the intake vents or soffits and is drawn out by the power vents, cooling off the attic space. The ventilators can be set to run on a timer, temperature sensor and simply on constant evacuation 24h\/7.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-ac0c5fe\" data-id=\"ac0c5fe\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b555915 elementor-widget elementor-widget-image\" data-id=\"b555915\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/mech-vents-1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Mechanical Vents - Roof Ventilators\" data-elementor-lightbox-description=\"Mechanical Vents - Roof Ventilators\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTM2MTMsInVybCI6Imh0dHBzOlwvXC92ZW50aWxhdGlvbi1tYXhpbXVtLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyMVwvMTFcL21lY2gtdmVudHMtMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/mech-vents-1-1024x682.png\" class=\"attachment-large size-large wp-image-13613\" alt=\"Mechanical Vents - Roof Ventilators\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/mech-vents-1-1024x682.png 1024w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/mech-vents-1-300x200.png 300w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/mech-vents-1-768x512.png 768w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/mech-vents-1.png 1109w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-eca5e7a elementor-widget elementor-widget-text-editor\" data-id=\"eca5e7a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>As previously mentioned, building codes across the USA and Canada tend to recommend a 1\/300 venting ratio for sloped roofs and 1\/150 venting ratio for flat roofs (please refer to your local building codes). But how do you determine the right amount of mechanical ventilators necessary to offer proper roof ventilation according to NFA requirements? In Canada, the CSA A93:19 norm offers an easy conversion from mechanical volume flow rate to NFA rating. The conversion is as follows:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-65ecdb2 elementor-widget elementor-widget-text-editor\" data-id=\"65ecdb2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><span style=\"font-weight: bold; text-align: center;\">1CFM = 0.34in\u00a0NFA<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-39fa3d0 elementor-widget elementor-widget-text-editor\" data-id=\"39fa3d0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>This allows us to convert a given volume (CFM) into an NFA rating for mechanical ventilators and hence apply the same basic calculation to obtain the required NFA. Thus, the right amount of solar powered vents or direct connection exhaust vents may be determined. These exhaust vents may be installed on roofs as well as walls and offer a variety of fans and control options.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7ec0e5f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7ec0e5f\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0e2a323\" data-id=\"0e2a323\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a51f59a elementor-widget elementor-widget-heading\" data-id=\"a51f59a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Active Ventilation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-03ca235 elementor-widget elementor-widget-text-editor\" data-id=\"03ca235\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tThe last category of available ventilators on the market is active type ventilators. Active ventilation products create a given volume flow rate of evacuation by utilizing average wind speeds. The vents can either be composed of moving or non-moving parts and require no energy to function. Active ventilators are essentially the middle-class division combining both NFA requirements with an additional venting value of volume flow rate developed by the roof vents. How do they work? Here are the two types of active ventilators:<p>\n<\/span>\n<ul>\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"text-decoration: underline;\"><b>The tower or \u2018\u2019Maxi\u2019\u2019 vent<\/b><\/span>: uses the Bernoulli principle to create a pressure differential between the ventilator and the attic space. This pressure differential combined with buoyancy ventilation, otherwise known as the chimney effect, allows this ventilator to exhaust air from inside the attic space at a variable CFM given local average wind speeds. Higher wind speeds flowing through the vent will result in a higher exhaust flow rate (CFM) from the attic.\u00a0\u00a0<\/span><\/li>\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"text-decoration: underline;\"><b>The turbine vent:<\/b><\/span> uses wind to make its turbine turn and hence exhausts air from the attic in this matter.\u00a0<\/span><\/li>\n<\/ul>\n<p><p>\nActive vents currently fall under the passive type category according to current Canadian building regulation. Hence, the calculation to determine the number of vents\u00a0installed\u00a0on a roof is done in the same\u00a0manner\u00a0as the passive ventilators. On the other hand, some manufacturers will offer a different, less restrictive, way to calculate the number of ventilators to install on a roof knowing that active ventilation vents are more efficient than building code requirements. Please note that these recommendations do not follow current building code requirements.<\/span>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-22c05f8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"22c05f8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-42bc61d\" data-id=\"42bc61d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-83f02a9 elementor-widget elementor-widget-image\" data-id=\"83f02a9\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/tower-maxi-vents-300x300.png\" class=\"attachment-medium size-medium wp-image-13617\" alt=\"Tower and Maxi Vent - Active Ventilation Roof Vent\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/tower-maxi-vents-300x300.png 300w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/tower-maxi-vents.png 1024w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/tower-maxi-vents-150x150.png 150w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/tower-maxi-vents-768x768.png 768w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-8bd5a5d\" data-id=\"8bd5a5d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c297f30 elementor-widget elementor-widget-image\" data-id=\"c297f30\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"251\" height=\"300\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/turbine-vents-251x300.png\" class=\"attachment-medium size-medium wp-image-13619\" alt=\"The Turbine Vent - Active Ventilation Roof Vent\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/turbine-vents-251x300.png 251w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/turbine-vents.png 297w\" sizes=\"(max-width: 251px) 100vw, 251px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-68e3934 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"68e3934\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1b56d92\" data-id=\"1b56d92\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-55dfac9 elementor-widget elementor-widget-heading\" data-id=\"55dfac9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pros and Cons: Active vs Passive vs Mechanical<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-364c64c elementor-widget elementor-widget-text-editor\" data-id=\"364c64c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Now that we&#8217;ve gone through the foundations of each category, how do these different roof ventilators compare to one another? It is important to specify that for the purpose of this exercise we will consider a northern climate (4 seasons) with snow precipitations.\u00a0<\/p><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-888dc21 elementor-widget elementor-widget-heading\" data-id=\"888dc21\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Pros and Cons Passive Ventilation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f7fe625 elementor-widget elementor-widget-text-editor\" data-id=\"f7fe625\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tPassive ventilators, in a general manner and excluding the gooseneck, are aesthetically appealing to the average consumer. Homeowners tend to like their low profile and discrete appearance, generally blending in very well with the roof of residential buildings. On another note, these units usually offer very small NFA ratings and require large amounts of vents to be installed on a roof to satisfy code requirements. Additionally, their aesthetically appealing concept is also the main reason why these ventilators have issues through winter, especially when located on low\/medium sloped roofs. Snow rapidly covers them and heat from the attic space melts the surrounding snow to create a block of ice, condemning the air flow to the exhaust outlets. At this point, any attic space equipped with passive type vents become unvented and condensation issues, as well as water infiltrations originating from the unit, are bound to occur.\n<p><p>\n\nAdditionally, it is important to keep in mind that these types of ventilators require directional winds to function properly. If your local winds are not able to push enough fresh air into the soffits, air movement in the attic will be slow and non-uniform, possibly creating dead zone pockets resulting in condensation issues. Also, plastic manufactured passive vents have been known to have issues with rodent intrusions.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-141b8df elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"141b8df\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7872f6d\" data-id=\"7872f6d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-1df77a5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1df77a5\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-74098a9\" data-id=\"74098a9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-be52181 elementor-widget elementor-widget-image\" data-id=\"be52181\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"618\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-1024x791.png\" class=\"attachment-large size-large wp-image-13629\" alt=\"Pros and Cons Passive Ventilation - Roof Vent\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-1024x791.png 1024w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-300x232.png 300w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-768x593.png 768w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-1536x1187.png 1536w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-2048x1583.png 2048w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-c2345f5\" data-id=\"c2345f5\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cb2a0dd elementor-widget elementor-widget-image\" data-id=\"cb2a0dd\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"618\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-2-1024x791.png\" class=\"attachment-large size-large wp-image-13615\" alt=\"Pros and Cons Passive Ventilation - Roof Vent\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-2-1024x791.png 1024w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-2-300x232.png 300w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-2-768x593.png 768w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-2-1536x1187.png 1536w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-passive-vents-2-2048x1583.png 2048w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b409ed5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b409ed5\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a460293\" data-id=\"a460293\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-192593d elementor-widget elementor-widget-heading\" data-id=\"192593d\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Pros and Cons Mechanical Ventilation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-14dbd64 elementor-widget elementor-widget-text-editor\" data-id=\"14dbd64\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Mechanical ventilators on the other hand are known to be less aesthetically pleasing than passive vents but offer higher efficiency ratings as they steadily draw out a given amount of volume (CFM) from the attic. Having a continuous rate of evacuation allows the attic to stay cool and dry during winter while also offering possible energy bill savings during the summer. The downside to these ventilators is that they are mechanical and moving parts are always bound to fail. Unfortunately, having the fan installed on the roof often means a homeowner won\u2019t realize possible malfunctions until it is too late, as it only takes a few hours for condensation to build-up in an attic space.<\/p><p><br \/>An important point to consider when installing these ventilators is to make sure your home has sufficient open air intake to compensate for the volume being evacuated. Not having the right amount of fresh air intake will lead to the creation of a negative pressure in the attic, consequently drawing hot and humid air from inside the home into the attic which may lead to condensation issues. Also, a disadvantage about solar-powered fans is that they do not work at night. The nocturnal period is the most important in attic ventilation as it allows the roof to cool down within a few degrees of the exterior temperature. Lastly, the high efficiency of these ventilators may allow possible energy bills savings during summertime but on the other hand will also cost you energy to operate on a 24h\/7 basis. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ee0cb5e elementor-widget elementor-widget-heading\" data-id=\"ee0cb5e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Pros and Cons Active Ventilation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-874c8ee elementor-widget elementor-widget-text-editor\" data-id=\"874c8ee\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tActive ventilators seem to have a mixed opinion on an aesthetic basis as they a little bigger than other ventilators and stand up above the ridgeline, utilizing the wind to operate. The \u2018&#8217;maxi&#8221; ventilator does not have any moving parts and offers continuous attic heat removal year-round as it stands high above the snow accumulations during winter months. This vent also has anti-gust deflectors eliminating the risk of snow or water infiltrations.\n<p><p>\nThe turbine ventilator, on the other hand, relies on its moving turbine to draw air from the attic and may freeze during freezing rain or heavy snowfall winter outbreaks. Once blocked, its overall efficiency is greatly reduced and the unit also loses its means to eliminate weather infiltrations, as the spinning turbine drains water out from the vent. Additionally, these units can sometimes be noisy as the spinning turbine can give out a squeaking sound.\n<p><p>\nActive ventilators also offer possible energy bill savings during the summertime as they can cool down the attic efficiently. Keep in mind that these units do not need any electricity to operate whereas the mechanical ventilators do, resulting in additional energy savings. In general, active vents are usually built from galvanized steel or aluminum, making them very reliable against rodents.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1609831 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1609831\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d111a28\" data-id=\"d111a28\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9a0854b elementor-widget elementor-widget-image\" data-id=\"9a0854b\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"602\" src=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-active-vents-1024x770.png\" class=\"attachment-large size-large wp-image-13631\" alt=\"Pros and Cons Active Ventilation - Roof Vent\" srcset=\"https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-active-vents-1024x770.png 1024w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-active-vents-300x226.png 300w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-active-vents-768x577.png 768w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-active-vents-1536x1155.png 1536w, https:\/\/ventilation-maximum.com\/wp-content\/uploads\/2021\/11\/pro-con-active-vents.png 1999w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-34a0cdc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"34a0cdc\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-53030fc\" data-id=\"53030fc\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fc6e9ad elementor-widget elementor-widget-heading\" data-id=\"fc6e9ad\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is the best long-term investment for your roof?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8efc1ae elementor-widget elementor-widget-text-editor\" data-id=\"8efc1ae\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>I think it is important to say that all types of vents have been proven to properly ventilate an attic space under given conditions. If your home is in a warm climate where cold weather and snow are not variables to consider, I&#8217;d say any type of vent will work cooling the attic given the right concept and installation. Mechanical and active vents will have an advantage over passive vents as they offer efficient venting and possible energy bill savings.<\/p><p>\u00a0<\/p><p>On an opposite note, if your home is in a northern climate where cold weather and snow are major factors to consider, the \u2018&#8217;Maxi&#8221; (or Maximum) ventilator would be the best choice. It is built from galvanized steel, stands high above the ridge line, offers year-round venting, offers continuous and variable exhaust flow rate according to local wind speeds to cool down the attic and lastly, will also save you money on energy bills during warm seasons.<\/p><p>\u00a0<\/p><p>For more information on our selecting a ventilator right for your home or building visit our <a href=\"https:\/\/ventilation-maximum.com\/en\/products\/\"><u>products page<\/u><\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6cdd0a1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6cdd0a1\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-023913b\" data-id=\"023913b\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-df15c1f elementor-widget elementor-widget-text-editor\" data-id=\"df15c1f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tAuthor : Jonathan Ramsay Massicotte, P.eng<br \/>\n\tTechnical and development Director at Ventilation Maximum\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>The Difference Between Active, Passive and Mechanical Roof Ventilators Attic spaces need to be properly vented to avoid several undesirable outcomes. If you haven&#8217;t had the chance to read our previous article on\u00a0attic ventilation, take a few moments to familiarize yourself with the concept. The roofing industry is currently filled with several different products regarding [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21764,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[143],"tags":[],"class_list":["post-13413","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-attic-ventilation-tips"],"_links":{"self":[{"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/posts\/13413","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/comments?post=13413"}],"version-history":[{"count":149,"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/posts\/13413\/revisions"}],"predecessor-version":[{"id":25272,"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/posts\/13413\/revisions\/25272"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/media\/21764"}],"wp:attachment":[{"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/media?parent=13413"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/categories?post=13413"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ventilation-maximum.com\/en\/wp-json\/wp\/v2\/tags?post=13413"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}