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Specifications
Power Attic Ventilators

HOW TO SPECIFY POWER ATTIC VENTILATORS
For proper attic ventilation, the Home Ventilation Institute recommends a system that provides at least 10 air exchanges an hour. To determine the fan capacity needed to provide this minimum airflow, use the following formula: attic square feet x 0.7 = CFM. Note: for roofs 7/12 or higher, you may want to add 20% more CFM capacity to handle the larger volume of attic space; 30% more for roofs 11/12 and higher.

POWERCOOL™ ROOF-MOUNTED POWER ATTIC VENTILATORS

Model Color CFM For Attics
Up To:
PowerCool Plus™ 15
Automatic Thermostat
and Humidistat		 Gray, Weatherwood,
Brown and Black		 1500 1900 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 1875 square feet
PowerCool™ BR26
Automatic Thermostat		 Gray, Weatherwood,
Brown and Black		 1170 1650 square feet
PowerCool™ BR26
Plastic Dome
Automatic Thermostat		 Gray and Black 1170 1650 square feet

WHISPER COOL™ GABLE-MOUNTED POWER ATTIC VENTILATORS

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

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