well-ventilated people

Specifications
Power Attic Ventilators

View the wide range of colors in which our products are available in our color chart.

HOW TO SIZE POWER VENTS?
Power vents are rated in CFM—cubic feet of air moved per minute. The higher the CFM, the more powerful the vent and the more air exchanges per hour it provides. To determine the minimum CFM required, multiply the attic square footage by 0.7. For example:

1500 square feet x 0.7 = 1050 CFM
Thus, a fan rated at least 1050 CFM is needed.

HOW MUCH INTAKE VENTILATION?
Just like any exhaust vent power vents need intake airflow to perform properly. To calculate how much intake the power vent needs simply divide the fan's CFM capacity by 300 and then convert that number to square inches.

  CFM of Power Vent

300
= Square feet of
intake net free area needed
x 144 = Square inches of
intake net free area needed
  For example:
  1050 CFM

300
= 3.5 Square feet of
intake net free area needed
x 144 = 504 Square inches of
intake net free area needed

AIR VENT POWER VENTS

ROOF-MOUNT MODELS

Model Color CFM For Attics
Up To:
Quality Roof-Mount RV26
Automatic Thermostat
Plastic dome
Gray, Brown 1170 1650 sq. ft.
Quality Roof-Mount RV26
Automatic Thermostat
Metal dome
Gray, Brown,
Weatherwood
1170 1650 sq. ft.
Premium Roof-Mount RV28
Automatic Thermostat
Metal Dome
Gray, Brown
Weatherwood
1320 1900 sq. ft.
Premium High-Powered Roof-Mount SV3000
Automatic Thermostat
Metal dome
Brown, Black
Weatherwood
1500 2100 sq. ft.
Premium Plus All Season™ ASR-HP
High-Powered Roof-Mount
Automatic Thermostat and Humidistat
Metal dome
Grey, Brown, Black
Weatherwood
1500 2100 sq. ft.

GABLE-MOUNT MODELS

Model CFM For Attics
Up To:
Gable-Mount WCGA
Automatic Thermostat
1050 1500 square feet
Gable-Mount WCGB
Automatic Thermostat
1320 1900 square feet
Gable-Mount APG
Automatic Thermostat
1620 2300 square feet
Gable-Mount APGH
Automatic Thermostat and Humidistat
1620 2300 square feet

Power Vents: Power Attic Vent | Solar Powered Roof-Mounted Attic Vent | Solar Powered Gable-Mounted Attic Vent | Gable-Mounted Power Attic Vent
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