Calling all HVAC gurus...

[gabemcg]

I live in a 4 bedroom apt ~1800'sq.


Is it more cost effective to leave a window A/C unit on the lowest cooling setting at night when it's not hot outside, or to turn it off and open windows? I was always told that it's better to keep the cool air in the house, and the compressor from having to work too hard and re-cool the house when you turn it back on

 

[T9D]

The best thing to do is just turn on the fan and pull in cool air from outside. If the air is cool enough it can work a whole lot better than the AC going even.

 

[skyking]

If the air outside is cooler than the air inside, use a couple of big box fans to cool the house down. Seal it up in the morning and turn on that air conditioner when you leave.

 

[jme5343]

I'd leave the a/c running at night if you live in an area with high humidity, otherwise, windows open if you're wanting to save some cash.

Me personally, I like it freezing, so I'd leave both running and pile on the blankets

 

[daveymark]

you don't need hvac training to know if it's going to be cheaper with the AC off

 

[gabemcg]

Originally posted by: jmebonner
I'd leave the a/c running at night if you live in an area with high humidity, otherwise, windows open if you're wanting to save some cash.

Me personally, I like it freezing, so I'd leave both running and pile on the blankets

me too so much for sustainablility... It's a good thing we're splitting the bill 4 ways!

 

[skyking]

It just got to the point where the outside=inside here, about 74. I turned off the AC units and started the exchange. Humidity is only 44% though.