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Solar pool heating in Austin?

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Posted by DeniskaMAshka on September 20, 2005, 7:25 pm
Has anyone installed a solar heating system for your swimming pool?

We are planning to put a pool in the backyard, but I can't find local
company to install solar heater. I would have thought that in a city
with over 300 sunny days this would be a perfect solution to extend a
pool season.

If anyone has suggestions, please let me know.


Posted by zenboom on September 20, 2005, 11:30 pm

300 sunny days and you want to make your pool warmer?!

Posted by DeniskaMAshka on September 21, 2005, 1:17 pm
 Jealous are we? :-)
Winters are sunny but chilly.

Posted by nicksanspam on September 21, 2005, 6:42 am

January looks like the worst case month for pool heating. NREL says
940 Btu/ft^2 falls on the ground and 1200 falls on a south wall on
an average 48.8 F day with a 58.8 daily max in Austin.

So 1 ft^2 of pool with an R1 cover with 90% solar transmission would
have 0.9x940 = 24h(T-48.8)1ft^2/R1, ie T = 84 F. If you need more heat,
you might pump some pool water over a dark south roof, with a large
piece of greenhouse polyethylene film suspended above the roof with
a few wires and galvanized pipe sleepers to keep it from touching
the roof and some straps over the top to avoid wind flutter. You may
not need a commercial pool heater.


Posted by DeniskaMAshka on September 21, 2005, 1:21 pm
 Thanks Nick, but I'm afraid I'm not much of "do it yourself" person. If
nothing else, I will probably buy the solar heating kit on the internet
and hire a local handyman to install it.

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