Home > Our Products > Attic Exhaust Vents > Power Vents > Gable-Mounted Power Attic Vent > Gable-Mounted Power Attic Vent Specifications

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:
PowerCool Plus™ 15 Automatic Thermostat and Humidistat	Gray, Weatherwood, Brown and Black	1500	2100 square feet
PowerCool Plus™ 12 Automatic Thermostat and Humidistat	Gray, Weatherwood, Brown and Black	1170	1650 square feet
PowerCool™ BR28 Automatic Thermostat	Gray and Weatherwood	1320	1900 square feet
PowerCool™ BR26 Automatic Thermostat	Gray, Weatherwood, Brown and Black	1170	1650 square feet
PowerCool™ BR26 Plastic Dome Automatic Thermostat	Steel: Gray, Brown, Black and Weatherwood Plastic: Gray, Brown and Black	1170	1650 square feet
SolarCool SC8BL solar powered with attached panel	Black	800	1200 square feet
SolarCool NPSP8WW solar powered with separate panel	Weatherwood	800	1200 square feet

GABLE-MOUNT MODELS

Model	CFM	For Attics Up To:
APGH with Automatic Thermostat and Humidistat	1620	2300 square feet
WCGB with Automatic Thermostat	1320	1900 square feet
NPSGB solar powered	800	1200 square feet