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I f your home has forced air heat and your bedroom is too cold, install a “register booster” or “register booster fan” on one register of each bedroom. These use a fan to draw out heated air from the HVAC duct, increasing the heat provided by the register.

A register booster fan will slightly reduce the heated air from the other registers on that HVAC branch. There will be several other registers on the branch, normally on the same floor. If all of your bedrooms are on the same branch and they each have a register booster, that branch should draw more heated air and decrease the warm air that flows through the other branches. With register boosters operating in the bedrooms, the house temperature can be set lower at night. They are sold at home centers and hardware stores.