# Air conditioner

**URL:** <https://boards.straightdope.com/t/air-conditioner/726067>\
**Category:** Factual Questions\
**Created:** [July 24, 2015, 4:27pm UTC](https://boards.straightdope.com/t/air-conditioner/726067 "2015-07-24T16:27:08Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![lk122232](https://avatars.discourse-cdn.com/v4/letter/l/67e7ee/32.png) [@lk122232](https://boards.straightdope.com/u/lk122232)\
**Post date:** [July 24, 2015, 4:27pm UTC](https://boards.straightdope.com/t/air-conditioner/726067/1 "2015-07-24T16:27:08Z")

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Should the vent be open or closed in a window unit?

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**Author:** ![Chefguy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chefguy/32/138_2.png) [@Chefguy](https://boards.straightdope.com/u/Chefguy)\
**Post date:** [July 24, 2015, 5:24pm UTC](https://boards.straightdope.com/t/air-conditioner/726067/2 "2015-07-24T17:24:51Z")

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Closed for cooling, open for air circulation.

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**Author:** ![Snnipe\_70E](https://avatars.discourse-cdn.com/v4/letter/s/b5a626/32.png) [@Snnipe\_70E](https://boards.straightdope.com/u/Snnipe_70E)\
**Post date:** [July 24, 2015, 11:30pm UTC](https://boards.straightdope.com/t/air-conditioner/726067/3 "2015-07-24T23:30:17Z")

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If your house is stale and fresh air would help open. If it is extremely hot outside closed.

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**Author:** ![Chefguy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chefguy/32/138_2.png) [@Chefguy](https://boards.straightdope.com/u/Chefguy)\
**Post date:** [July 24, 2015, 11:40pm UTC](https://boards.straightdope.com/t/air-conditioner/726067/4 "2015-07-24T23:40:35Z")

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> [@Snnipe\_70E](#):
>
> If your house is stale and fresh air would help open. If it is extremely hot outside closed.

Do tell. . .😃