The blower pulls air from the house through the return ducts and then pushes it back into the house through the supply ducts. Thus, closing vents changes the balance of your HVAC system.” ...

If you close a room's return vents, you'll reduce the amount ... A heat exchanger transfers heat from the burner to the air moving through your HVAC system. When overworked or overheated, it ...

Despite what you might have heard, HVAC experts say that ... temperature in your house. As the return removes the cool or hot air, Martin says, the supply vents replace this air with the opposite ...