Definition
A whole-house fan pulls cool night air through your windows and exhausts hot air through the attic. It's most effective in climates with cool nights and moderate days. When conditions are right, it can reduce AC usage 30-50%, saving money and energy.
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Whole-house fans pull cool night air through windows exhausting hot air through attic. Cost is $500-1,500 installed. Most effective in cool nights with moderate day temperatures. Reduces AC usage 30-50% in appropriate climates. Improves air circulation and reduces stuffiness. Requires open windows operationally. Primarily beneficial in inland areas with cool nights. Mediterranean and desert climates optimize benefits. Noise level requires consideration.
Pro Tip
Whole-house fans work best in inland areas with cool nights. In humid climates, they're less effective.
Example
A whole-house fan pulled cool night air through windows reducing AC usage significantly.