yes. All you need for solar water heating (in summer or where it never
freezes) is black pvc tubing laid out where the sun will heat it and a
circ pump. It can be on the roof, or on the ground/pavement, or
anywhere else it will catch sun. When/where freezing conditions exist,
it gets a little more complicated. There is science also to
determining the dia and length of the tubing needed, but that can be
trial and error.
On the roof, it can be a gravity hydronic system, without a circ pump.
Mitch Haley via Mercedes <mailto:mercedes@okiebenz.com>
December 30, 2019 at 5:07 PM
Back around 1980, I saw plans in Popular Science for a very cheap
solar heater.
It was, IIRC, a 100' coil of black poly pipe mounted to a black
painted marine plywood box and affixed on the roof.
The same black poly pipe that transports potable water from my well to
my house.
It was to be plumbed between the water supply and the water heater to
preheat the input to the heater.
No need to drain it and bypass it for the winter in Pinellas.
And it sounds like Dan's already got the plumbing loop to the roof.
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