Available Colours

Regent Grey


Metro Brown


For Additional Colours

Roof Vent

Ventilation area 151 to 400 ft2

Deflectors: 4
Base: 45 degree cant.
Height: 24 1/2 in.
Ventilation area: 151 to 400 ft.2

Unlike gooseneck, the Maximum Ventilators are CSA approved. Its unique storm proof system prevents infiltrations while at the same time capturing the wind flow from all directions and at wind velocities as low as 6 km./hr. (4 mi./hr.). With this combination of technology, wind and pressure differentials, a “chimney or, vacuum effect” results in drawing the stale air and moisture out, thus preventing moisture & heat build-up within the attic space.

This model has been designed to be installed onto a wooden curb. The thickness of the wooden curb in conjunction with the thickness of the roofing membrane will determine the size of the ventilator required. The interior dimension of the wood curb should equal to the opening in the deck to allow for unobstructed air flow. The suggested roof area for one (1) ventilator model VMAX-101-12 has been calculated based on a 10 in. x 10 in. opening or (hole) of curb and roof deck.

Ventilation Chart For Model VMAX-101

Net Ventilation Air Space Between Underside of Roof Deck & Insulation Roof Area That One Ventilation 101 (12" x 12") Can Ventilate
1 in. to 6inc. 101 is Not Recommended, Use Model 102
7 in. to 12 in. 151-200 ft.2
13 in. to 24 in. 201-300 ft.2
25 in. and more 301-400 ft.2


  • Deflectors: 4
  • Standard Gauge: 24 & 26
  • Rodent Proof: Built-in galvanized wire mesh screen
  • Storm Proof: Unique precision engineered deflector system
  • Net Free Evacuation: 144 in2
  • Finish: Interior and exterior powder coated polyester baked paint with UV protection
  • Suggested Ventilation Area: 151 to 400 ft2 (Refer to chart)
  • Base Flashing: 45 degree cant flashing
  • Tested Extraction Rate: 418 CFM
  • Solid: Built of galvanized steel
  • Compliances: CSA, CAN-3-A930M82, ASTM-527
  • Warranty: Limited Lifetime Warranty on all manufacturing defects, 5 years on paint & corrosion
  • Available Colours: Black, Brown, Grey and White

A limited selection of special colours is available at a slight premium.



Used in conjunction with the media filter. The polypropylene retention pan must be placed over the insulation to act as a second line of defense against infiltration.


If your roof ventilator is not high enough. We have an extension from 12″ to 72″. Available Colours: Black, Brown, and Grey.

  • Special orders only. Manufacturing delays may vary depending on season.
  • Available Colours: Black, brown and grey.
  • Please note that we can manufacture in other sizes, metals or gauges.
  • Support Brackets are available for extensions three (3) feet and higher at a small premium.

A limited selection of special colours is available at a slight premium.


If snow infiltration is a problem. The Media Filter can be used in residential, commercial and industrial applications. A loss of ventilator efficiency of approximately 20% should be considered.