Solar Hot water

iamgeo · 07-13-11, 03:59 PM

I need some advice.
This is my house. That part of the roof with the black lines on it gets full sun morning till about 7pm.
At the bottom of the roof from the front of the house to the back is about 42 ft.
I have an electric tankless water heater. I would like to heat the water before it gets to the tankless heater. Just trying to save electricity.
The black lines represent 1 inch diameter pvc pipe that I would paint black.
Where the pipes go under the house I would add a hose bib to facilitate having hot water outside and to drain the system in case of hard freeze
Is this idea sound? Is the pressure relief valve a good idea?
Too much weight for the roof?
Am I just spinning my wheels?

07-13-11, 03:59 PM	#1
iamgeo Apprentice EcoRenovator Join Date: Aug 2010 Location: Lakehills, Tx Posts: 168 Thanks: 4 Thanked 10 Times in 9 Posts	Solar Hot water I need some advice. This is my house. That part of the roof with the black lines on it gets full sun morning till about 7pm. At the bottom of the roof from the front of the house to the back is about 42 ft. I have an electric tankless water heater. I would like to heat the water before it gets to the tankless heater. Just trying to save electricity. The black lines represent 1 inch diameter pvc pipe that I would paint black. Where the pipes go under the house I would add a hose bib to facilitate having hot water outside and to drain the system in case of hard freeze Is this idea sound? Is the pressure relief valve a good idea? Too much weight for the roof? Am I just spinning my wheels? Last edited by iamgeo; 07-13-11 at 05:00 PM..