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how to keep my house cool? Is there a way i can make a simple cooler that circulates water to keep a particular room co? Answered

I stay in seattle area, and it's around 90 - 100 F nowadays, We do not have an AC in house. We have a 2 storied house with bedrooms on the 2nd floor. Lots of windows, But the problem is that there is no wind blowing, thus the house inside is very hot even with the table fans and ceiling fans running. Any tips of keeping the house cold? Any way to build something with that uses water as a cooling agent?


just buy a small air conditioner or make one there are numerous instructables on here about it.

I'm really tempted to design a closed loop heat battery buried in the yard...I figure with passive radiators (no active heat pumping, just fluid pumping) I could get the battery down to the ambient 10-20 degrees it is outside at night, then use that to cool the 30 degree house during the day when the outside temp is near 40C.

I had the same problem at a camp I went to for a few years. Open every window. Get a couple box fans (the square, non rotating ones), or just disable the rotation on a rotating fan. Put one in a window near the edge of the room and turn it on. Use a piece of paper to see what direction the air is blowing (into the house or outside- if it is blowing outside the paper will stick to the fan). Then, take another fan and put it in a window across the room, and have it blow the same direction (so if the first one was blowing outside air into the house, have this one blow inside air out). Basically it makes a wind tunnel, and it stays very cool. You can also turn on any ceiling fans in the room to have the air circulate. The only downside is if you want to do this for several rooms, you will need a lot of fans. But I bet if you ask around, people will have old fans in their basement they aren't using that they will sell/give/loan to you.

Water running over an open weave mat with air blowing through the mat into the house will lower temps by as much as 15 deg C. Unfortunately it also raises the humidity to 100%. Ice packs in front of a fan would help.

I live in Idaho, and, while it doesn't get as hot here, it still gets 80+ F on a hot summer day. What my family does is open most of the easily accessible windows at night, and leave them open until the temperature outside catches up to the inside temperature in the morning. If there's no wind, we put a fan in one of the windows to move the air along. Using this method, we can get our house down to 65 F, and it rarely would get above 73-ish. You could also build a swamp cooler and run it at night (or during the day) for better cooling. We just put in an open-loop heat pump, so we use the A/C on that nowadays, but it's still environmentally friendly. Hope this helps.