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Cooling Your House With Whole House Fans

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  • Cooling Your House With Whole House Fans



    Complete cooling using a whole house fan is a good substitute for an air conditioner in most climates. Whole house fans combined with ceiling fans and other circulating fans provide acceptable comfort, even in hot weather. The good part about these systems is that the ducts of any central heating and cooling system can be modified to provide whole house cooling.



    How Does A Whole House Fan Works?



    Whole house fans pull in the air from windows and exhausts it through the roof and attic. It provides good attic ventilation and cools down the house. These systems should provide houses with 30 to 60 air changes per hour, but this may vary with climate. You can always check with a professional to determine what would be appropriate for your home, before going for a whole house fan installation.



    Installation



    Whole house fan installation might be tricky, but you can always hire a professional for taking the attic measurements, installing the dedicated circuit wiring and the new attic vents, if required.
    • Usually, you require 2 to 4 times the normal area of attic vents, or nearly 1 square foot of net free area for every 750 cubic feet per minute of fan capacity. This is to exhaust the fan's air outdoors. More vent area is always preferable for optimal whole house fan performance.
    • If your fan doesn't come with a tight-sealing winter cover, you can either build one or buy one. If you switching to a whole house fan from air conditioning, then you should build a tightly sealed, hinged door for the fan opening, which is easy to close and open, while switching the cooling methods.
    • While installation, you should open windows throughout the house so as to prevent any concentrated or powerful suction in one location. If we do not provide enough ventilation, the fans may cause a backdraft in the furnace, gas-fired dryer, water heater or may pull combustion products like carbon monoxide into the living space.



    Whole house fan installation should be done cautiously, otherwise these can be noisy. Additionally, all whole house fans should be installed with rubber or felt gaskets so as to dampen the noise. Hiring a professional can always prove helpful.



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