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Hot air rises -- and you lose heat
It's a basic principle -- hot air rises. And as it does, it can literally pull cold air inside your house. This "stack effect" can affect your comfort in ways that might surprise you. The first step, of course, is to plug those gaps that allow cold air to get into the house: by caulking, weather-stripping and insulating. But a step as simple as closing an interior door or two can also help. Stairways and halls act as natural "stacks," so shutting doors that lead into hallways or stairwells can prevent warm air from being pulled out of other rooms.
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