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http://rimstar.org/renewnrg/diy_pex_solar_hot_water_thermal_dn.htm
The total cost to build and install myself was about $400 total. I got my money back on it in approx. 1.6 years . In the link, it shows pictures of the construction of the box / a piping diagram / and test results. Its been in operation for about 2 years now and it puts out some good quality hot water that i have to mix in some cold water at the shower faucet . Plenty hot enough for the auto dishwasher too. Last year, i ran my electric water heater about 8 times total under heavily-cloudy skies ... otherwise , I get all the hot water i need from free solar energy. Its not a draindown system and i dont use anti-freeze liquid in it -- havent had any incidents even with the overnight temperature reaching 22 f a couple times.
Just a headsup in case youre considering it. My chief aim was to make it as simple and low cost as possible and to meet my hot water needs as a single occupant .
The total cost to build and install myself was about $400 total. I got my money back on it in approx. 1.6 years . In the link, it shows pictures of the construction of the box / a piping diagram / and test results. Its been in operation for about 2 years now and it puts out some good quality hot water that i have to mix in some cold water at the shower faucet . Plenty hot enough for the auto dishwasher too. Last year, i ran my electric water heater about 8 times total under heavily-cloudy skies ... otherwise , I get all the hot water i need from free solar energy. Its not a draindown system and i dont use anti-freeze liquid in it -- havent had any incidents even with the overnight temperature reaching 22 f a couple times.
Just a headsup in case youre considering it. My chief aim was to make it as simple and low cost as possible and to meet my hot water needs as a single occupant .