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Old 11-07-2007, 01:38 PM   #1
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How about this for super cheap A/C

My old mans house sits in a area of our state that has a very high water table. The house has a well and the water comes in right next to his furnace. Maybe a foot away from the duct work. As you may know water below the earth stays about the same temp through out the year. About 50 degrees I was thinking I could make a coil out of copper pipe or install a pre made coil into the return air system and install a electronic valve controlled by the thermostat to open and close the water source. I would discharge the water either to the sprinkler system or when needed to the hot water tank. I would set the sprinkler system to open so when ever the thermostat triggers the water opens up and I get cheap AC, paying for the electricity for the blower and pump. This will water the lawn at the same time. In the winter I could have the water cut off completely to the coil and diverted to the water heater with another valve

Everything is already there all I would need is a coil and some plumbing work.. maybe a bit of tin work too.

I drew a diagram of what I was thinking of..

What do you think will this work?

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Old 11-07-2007, 01:55 PM   #2
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Unfortunately you can only use cooled water to remove a small amount of heat before you have to start dealing with condensation. That may be a critical issue in this, but I do like the idea!
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Old 11-07-2007, 02:02 PM   #3
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Unfortunately you can only use cooled water to remove a small amount of heat before you have to start dealing with condensation. That may be a critical issue in this, but I do like the idea!
I thought of that. I could install a drain tube on the bottom of the return air duct and feed it to the sump pump. The forced air will push it down the drain tube. Maybe even a removable panel to clean off the coil. Put a valve in the drain tube so in the winter no forced air feeds through the tube.
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Old 11-07-2007, 02:35 PM   #4
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Feed the water to a sprinkler on the roof to give maximum benefit. My brother in law has two on his roof - suprisingly effective.
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Old 11-07-2007, 03:02 PM   #5
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Feed the water to a sprinkler on the roof to give maximum benefit. My brother in law has two on his roof - suprisingly effective.
I hope he doesnt have the ones that go back and forth. Thats would look funny . Maybe the hose type with holes in it, run along the span of the peak? interesting.. I like that idea.
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Old 11-07-2007, 06:05 PM   #6
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Or make a cooling tower! Classic technology at its finest!
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Old 12-28-2007, 05:49 PM   #7
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Feed the water to a sprinkler on the roof to give maximum benefit. My brother in law has two on his roof - suprisingly effective.
What kind of roofing material does the house have? I have Spanish tile on my roof which is quite absorbent, I've often wondered if a sprinkler and evap cooling on my roof would be effective.
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