2/11/14
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The exhaust fans in your kitchen and bathroom can do a great job of sucking smelly or smoky air out of your home, but they can also make your home's heating system inefficient. Since they expel unwanted air from the home, leaving an exhaust fan on for too long forces warm air out of your home. So don't leave the exhaust fans on for too long if you want to save money on your heating costs. The same rule also applies in the hot summer months when you're trying to cool down your home.