These fans are a smart choice for homeowners who want to save money cooling their homes in summer.
Operating Principle:
Located in the ceiling between the living space of a home and the attic, it moves air from the living space into the attic. Typically used at night when the temperature and humidity of the air outdoors is more favorable than the conditions indoors, the fan pulls cool air into the living space through open windows and forces hot air into the attic and then out of the home through your attic’s soffit, gable, or ridge vents.
Benefits:
These fans draw in and circulate fresh air through a home, providing an inexpensive cooling effect when conditions outdoors are cooler and less humid than conditions indoors. The circulated fresh air also dilutes and any airborne contaminants in the home.
Things To Consider:
The cost savings due to reduced air conditioner load depends on the price of electricity in your area, temperature and humidity of the outdoor air, and the amount of ventilation your whole house fan is able to provide. A typical installation will usually pay for itself in savings within 1-2 summers of use.
Some whole house fans are quiet, others are loud. Keep this in mind along with your intended use then selecting a fan. If you intend to run the fan for a short time before bed to cool the house and then turn it off before you go to sleep, noise may not be a concern. If you intend to run the fan continuously at night, choose a quiet model.
During winter, an uninsulated unit will allow cold air form the attic to leak into the living space and will allow warm air from the living space to leak out. In areas with cold winters, it is recommended fans be sealed and insulated during winter months. Many fans are equipped with insulated motorized doors that automatically open when the fan turns on and close when it turns off, eliminating this problem.
If outdoor air is contaminated or polluted (pollen or smoke/fumes), the fan should not be used because it will suck these contaminants into the home.
As many windows as possible must be opened to let fresh air in, and properly sized attic vents are required to allow air to exit the attic.
Fireplace dampers and/or doors and furnace/water heater room doors must be closed when the whole house fan is on. The suction of the whole house fan is so great that it may draw air from the outside through a chimney. Since this air is likely to be contaminated with soot and ashes, possible airflow paths from chimneys to the home should be sealed.
Whole House Fans On The Market:
Quiet Cool Whole House Fans
Check out their website: http://www.quietcoolfan.com/
Marley Whole House Fans
Check out their website: http://www.marleymep.com/
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