Q:

What is the purpose of the vent open or closed on a window air conditioner?

A:

Quick Answer

An open vent on a window air conditioner allows fresh air from outside to come into the home and circulate along with the cool air produced by the unit. A closed vent prevents warm, fresh air from entering the home.

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What is the purpose of the vent open or closed on a window air conditioner?
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Full Answer

While an open vent is not ideal for efficiency, since the unit has to work harder to cool down the warm air, it does serve a purpose. Leaving the vent open refreshes stale air and removes odors from the room. Additionally, the vent makes it possible to run the unit on the fan-only setting, which simply pulls in air from outdoors on cool or mild days.

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