The Truth About Closed Heating Vents

closed heating vent, closing heating vents

Most homeowners this winter are looking for affordable ways to keep the home cozy. One trick they are resorting to is closed heating vents in unoccupied rooms. Does closing heating vents actually work to improve home heating and circulation?

Why Closing Heating Vents Supposedly Works

The idea behind this DIY trick is that sealing vents in unused spaces redirects the airflow to the rooms in use. The belief is that when air hits a dead end, it reverses direction and spreads to rooms with open vents. Homeowners will actually tape cardboard over the vents to seal them. Unfortunately, the closed heating vent tactic doesn’t work, and might actually be counterproductive. 

The Truth About Sealed Vents

If your air vents are in top condition, then this method may have a small beneficial effect. However, most residential ductwork contains cracks and leaks. The heat from the furnace will just escape through these exposed openings. 

In fact, this might increase overall heat and air loss. How so? Even if you close off a vent, the room still has other openings, such as doors and other access points. The room will use these openings to draw air from rooms with unsealed vents.

The bottom line is that furnaces and ACs operate optimally when the airflow is evenly distributed. You cannot get more air to one room by cutting off heating vents in another. The air will naturally find a way to rebalance its distribution. A sealed vent results in air distribution through less efficient means, leading to hot and cold spots.

We Restore Air Flow Balance

If you suspect air flow is less than optimal, then call Aurora Edmonds Furnace Cleaning. This is the time of year for furnace and dryer vent maintenance. The takeaway lesson here is that closing a heating vent is never the way to improve air flow.

Air Vent and Ductwork Repair

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