this post was submitted on 17 Jul 2023
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If AC isnt an option, the way Ive gotten through summers without is opening one window on one side of the building, then another one on the opposite side. Then point a box fan facing outward of one window, and do your best to seal the gaps with some cardboard or whatever you have. This will create negative pressure in the building, drawing in a bunch of air from the opposite window.
Actually it is better to put the fan a few feet away from the window pointing out.
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would be nice with a test for a sealed fan like I described. the problem with that setup is that the negative pressure will try to pull from both windows, competing with the fan trying to blow out and not getting as much flow
I live in the southern US, and my house basically has this built-in. There’s a big fan in the middle of the house that blows air into the attic, so if you open a few windows and flip the fan on it creates a breeze through the whole house.
Make sure your sewer traps haven’t dried up though. I turned it on with the house closed up one day and it sucked in air through the shower drain in the guest bathroom that hadn’t been used in a while…
Yeah, a whole-house fan. You turn it on in the evening and it expels hot attic air from the top while sucking in cool fresh air through open windows. It actually works really well and is much more energy efficient than AC. When it gets super hot you still need AC though.
Attic fans are great. We'd run it when the sun went down to draw in the cool night air. After that we shut everything up and drew the blinds. The house would stay very cool until late the next afternoon. On super hot days we might have run the AC for a few hours in the late afternoon or evening.
But won't you draw in a bunch of hot air?
it's the same reason a breezy summer day feels cooler, the air is still cooler than your body temp and draws away heat better than sitting in still air, plus its more evaporation if you're sweating hot. also indoors without AC during summer is an insulated oven.
You turn the fan off during the day and on at night, I assume