Will Closing Off Rooms Save On Your Heating and Cooling Bill?
If you have rooms that go unused for long periods of time such as guest rooms, bedrooms or basements, you may have thought: if the room is unused, why not close the doors and air registers to save energy? While this seems like common sense, it can actually waste energy and shorten the life of your heating and cooling system. It can also making the remaining occupied rooms less comfortable.
When a central heating and cooling system is installed, the HVAC technician carefully measures the volume of air in the entire home. The furnace and air conditioner are then sized to provide the best performance, efficiency and comfort. When the air volume is reduced by closing air vents, rather than making your air conditioner cool less or the furnace heat less, they simply send the same amount of air to the open air ducts and vents throughout the home. During normal operation a home's ductwork will lose 20-30% of the air though leaks, so closing vents increases this loss of conditioned air, wasting energy. Closing air vents will also increase the pressure inside the ductwork, which in turn will make the blower fan work harder to force the air through. The result is an increased risk of the evaporator coil freezing or the heat exchanger overheating.
Of course, closing one or two air vents is not going to cause major issues, but for each vent that is closed the performance of your central heating and cooling system will be diminished. If you have questions about your heating
or ventilation system, give Air Specialties a call. We can help answer all your questions.