4 Wing attic ventilator for sloped roofs Français
Attic ventilator OP-A412 is conceived for sloped roofs. Its sophisticated 4 wings design and openings allow optimal attic ventilation. Its ventilator structure punched openings eliminates all maintenance needs and prevents rodents and birds from getting inside. Its anti-gust deflectors prevents bad weather infiltration from any directions. OP-A412 Ventilator allows an advantageous cooler attic in summer and dryer in winter, extending structural integrity, adding superior interior comfort, creating also energy savings. This static ventilator offers a superior air aspiration and, with the help of wind, produces a chimney effect. Air is continuously exchanged. It exchanges attic air at a rate of 418 ft³/min, ventilating a 1000 to 1200 ft² area.
  • Easy to install, screws are included
  • For flat roof
  • Storm proofdeflector
  • Quiet and maintenance-free
  • Available in black, brown, grey, charcoal and other*
Determine ventilator’s emplacement from inside, with a nail at the center of two trusses and at 8 inches from roof crest. Trace, with a chalk , the inside of the flashing having the nail in the middle, insuring to have flashing parallel to roof crest. Cut the opening, remove nails from top and sides of the hole that would bother flashing installation. Apply Condor Plastic Cement beneath flashing base. Slide flashing under side and top shingles and screw to roof plywood. Lift side and top shingles and fix them to the flashing with Condor Plastic cement. Pay attention not to put plastic cement on flashing gutter, bottom part. Fix metallic part of flashing so it will level. Place ventilator on its flashing. Fix ventilator’s head on its flashing, making sure that it is level with crest. Place a screw on each side in its pre-perforated hole. Apply Condor plastic Cement to obtain a waterproof base.

The national building code requires adequate ventilation of the attic, according to the minimum standard of Section 9.19.1 or according to CSA CAN3-A93-M82.

Ventilation is required by Canada’s building code. The issue remains in the fact of keeping a fresh attic. Ideally, attic temperature would be, a few degree close, similar to exterior temperature. In summer, using an Optimum ventilator allows heat elimination from the attic. This heat radiates inside and warms up the house. It can also create seepage problems, warp coatings or curl asphalt shingles. Thereby, an air conditioner must work continuously to cool down living areas. In wintertime, interior house air is warmer and contains more vapor pressure, in opposition to the dry and cold attic air. Vapor will have a tendency to migrate to the attic and condensate on cold building structure pieces. This condensation can humidify and compress isolation reducing at the same time the isolation factor and allowing more vapor migration. This humidity leads to ice formation on the roof, mildew and rot of the structure.
Certified CCMC 13566-L (Canadian Construction Materials Centre)
Dimensions and special features
4 Wing attic ventilator for sloped roofs

The ventilator structure is designed galvanized steel. It covered with baked powder paint.











30,4 cm • 12”

49,5 cm • 19,5”

25,4 cm • 10”

27,9 cm • 11”

0,09 m² • 144 in.²


22 - 24 & 26


35,6 cm • 14”

54,6 cm • 21,5”

25,4 cm • 10”

34,2 cm • 13,5"

0,12 m² • 196 in.²


22 - 24 & 26


40,6 cm • 16”

59,6 cm • 23,5”

31,7 cm • 12,5”

40 cm • 15,75”

0,16 m² • 256 in.²


22 - 24 & 26


45,7 cm • 18”

64,7 cm • 25,5”

31,7 cm • 12,5”

42,5 cm • 16,75”

0,20 m² • 324 in.²


22 - 24 & 26


50,8 cm • 20”

69,8 cm • 27,5”

37,5 cm • 14,75”

41,3 cm • 16,25”

0,26 m² • 400 in.²


22 & 24


55,8 cm • 22”

74,9 cm • 29,5”

37,5 cm • 14,75”

42,5 cm • 16,75”

0,31 m² • 484 in.²


22 & 24


60,9 cm • 24”

80 cm • 31,5”

43,8 cm • 17,25”

43,2 cm • 17”

0,37 m² • 576 in.²


22 & 24

  • Models OP-A412 to OP-A724 are available with filter if needed.
  • Models OP-A414, OP-A516, OP-A518, OP-A620, OP-A622 and OP-A724 are available on special orders only.
  • We can manufacture other dimension on request.
  • There are other color choice available, see our website.

The exhaust area based on air evacuation ratio.

The customer shall verify of the suitability of this product for the intended purpose. Applicator's skill, weather and surface conditions being beyond manufacturer's control, we limit our liability to replacement of defective material only in sealed container, within 1 year of proof of purchase. FOB plant. For more details refer to:http://www.condor.pro/optimum/Warranty_Optimum.pdf

4 Wing attic ventilator for sloped roofs

It is necessary to ensure that the base is completely watertight. That all joints on base are well covered by proper products making them completely watertight. Make sure to pass on the original joint located at the base of the flashing
Optimum OP-A412 angle base ventilator for sloped roofs Installation
Optimum OP-A412 angle base ventilator for sloped roofs Installation
Optimum's ventilator are avalable in :
Black, Grey, Charcoal and Brown
Optimum's ventilator are avalable in : Black, Grey and Brown
Others Optimum's colours available by special orders
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