Question about Heating & Cooling
When ac unit running should the vent control be open or closed ? what is the difference ?
The vent open draws in a small amount of fresh (outside) air to mix with the air being recirculated in the house to provide an air exchange. The vent closed will circulate the air already in the house.
In most cases its a good idea to leave it open unless you have a drafty house or find it difficult for the air conditioner to keep up.
Posted on Jun 03, 2010
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Posted on Jan 02, 2017
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