What Happens If You Block a Return Vent

Blocking air return vents causes your system to work harder, as there is less air flow to move the air back to the furnace. This continued strain on the HVAC system can lead to a decrease in performance and more HVAC repairs down the road.

Is it OK to block return vents?

It’s important not to block your return air vent because your HVAC system needs constant return air to work properly. A blocked air return vent will cause your system to lose efficiency and can cause premature failure of your HVAC system.

Should return air vents be closed?

In the same way that hot air rises, cold air stays lower. So when you’re trying to heat your home, your lower return vents should be open to collect the cold air and your upper return vents should be closed to keep the heat from escaping.

Alexander Ross

Alexander Ross

Gaming, Esports & Interactive Media Writer

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.

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