Erv4 Attic Fan

The erv4 model power roof mount vent can move air at a rate of up to 1000 cu. Energy efficient uses up to 55 less electricity than typical competitor s vents based on gaf testing at 120 volt helps reduce energy costs and helps prolong the life of the roof and shingles. The inexpensive fans can help reduce heating and cooling costs by evacuating superheated or cold air.

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