Do Closing Vents in Unused Rooms Save Money?
Homeowners often wonder whether simply closing air vents in unused rooms is a smart way to cut heating and cooling bills. The short answer is that it can reduce energy use in some homes, but it’s not a universal money-saver—and doing it incorrectly may cause comfort problems or strain on the system.
What matters most is how your heating and air-conditioning system distributes air, and whether it’s designed to handle rooms being starved of airflow.
When closing vents may save energy
In many conventional forced-air systems, air is moved based on thermostat calls for heating or cooling. If closing a vent significantly reduces the amount of heated/cooled air that needs to be delivered to a space—and that space would otherwise pull down overall efficiency—then energy consumption may drop slightly.
For example, if an unused room is consistently colder than ... Read more »

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