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Posted by Brian Graham on November 7, 2006, 1:38 pm
 
A friend of mine bought the parts (fins, headers, glass) direct from the
manufacturer and built it himself. He saved 50% and was able to build a pair of
collectors for $000 Canadian.

Now the tanks can get expensive - $000 iirc. Myself, I pulled out the
electrical elements from a water heater. I bought 1/4" copper plates, drilled a
hole and brazed a pipe through the middle. I circulate plain water, and saved
the cost of a commercial tank. Obviously, I shut down for the winter. But that's
where the tank on my wood stove takes over. :-)

By the way, a friend of mine used a patio door and put 100' of black plastic
piping under the glass. He gets about 30 seconds of hot water every 10 mins. No
comparison.

Bite the bullet and make/buy a proper collector. You won't be sorry.
--
Brian


THANKS for all the replies.  I guess I'll just experiment.  Buying a
commercially available unit is out of the question.  I could build one the
size of a football field for what they want for a 4x8.

--
Steve Barker




Posted by Gary on November 7, 2006, 4:06 pm
 
Steve Barker LT wrote:

Hi Steve,

On the make your own front, in addition to what Jeff mentions, here are a couple
  others:
All listed on this page:
http://www.builditsolar.com/Projects/WaterHeating/water_heating.htm#DB%20and%20Closed%20Loop

The "Maine Solar" one looks like it would go together fairly easily, and avoids
the brazing of the risers into the header.  I understand that quite a few of
them have been put together at Maine Solar workshops -- you could contact
Richard K. directly with any questions.

Its worth having a look through "Kris's Collector" -- he does some really nice
work, and has lots of pictures.

JC Solar Homes has a book on building a serpentine collector.  John C. is very
active in the Yahoo Groups SolarHeat group.  A number of people in that group
have experience with this collector and can answer questions.

--------
I opted for buying the absorber plates for my collectors, and then building the
rest.  The way I did it, this worked out to about $ per sqft (but read the cost
breakdown carefully).  This compares to about $0 per sqft for commercial
collectors.  I used the absorber plates sold  by SolarEnergy.com -- these are
all copper and selective coating.  SunRay.com also makes some inexpensive ones
with alum fins mechanically bonded to copper risers.
Mine is described in excruciating detail here:
http://www.builditsolar.com/Projects/SpaceHeating/SolarShed/solarshed.htm
(see the Shed and Collector sub link)

Good Luck!

--


Gary

www.BuildItSolar.com
gary@BuildItSolar.com
"Build It Yourself" Solar Projects









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