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DIY Solar Water Heater

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Uploaded by on May 29, 2010

Our Homemade Solar Water Heater we built to heat the water for our Homemade Ofuro (Japanese Soaking Tub).

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Howto & Style

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Uploader Comments (TheHalcyonTimes)

  • So whats the water temp coming out of this? I like to build 1 for a big inground pool

  • Our thermometer only went up to 120 degrees, and it pegged it at 120. It could be higher, but we know it was at least 120 degrees. Thanks for watching.

  • NIce one cheers for posting, have you installed this into you house, are you planning to make a bigger one with more tubing? Was the fogging due to a leak of the poly carb front? ps could you also use reflective cheap mirror plastics to aim additional sunlight at your heater, also where did you come up with the spacing of the tubes was math involved or could they have worked as well but been closer together? Cheers PEACE

  • We haven't installed it into the house as of yet. The fogging was due to not adding a better vent to the poly carb front... but if we had to do it over again, we'd use glass. Yes, you could use reflective material to aim sunlight. There was no math involved in the tube spacing, but we had to make sure that the spacing for the aluminum flashing (which heats up the copper tubing) wasn't too close together because the flashing wouldn't heat up enough to transfer the heat to the water.

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  • green homes

  • Thinking one could harvest hot air as well as water from the same box

    thanks for posting it up

  • Just an FYI for those having fogging problems. You could always build in a bit of silica gel (the stuff that comes in the little packets in things you buy that says "silica gel do not eat"). It will absorb the moisture in your sealed box.

  • you should consider insulating the outlet pipe as you lose about 20 watts of energy per metre even with a well insulated pipe. also if the glass is fogging you may have a leak, but don't have a ventilation gap as you want to maintain the greenhouse effect inside the box

  • Looks great. Nice job.

  • why not thermosiphon method ?

  • @TheHalcyonTimes why didnt you insulate it 

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