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  • From: "JERROLD KOERNER" <j.f.koerner@worldnet.att.net>
  • To: nafex@yahoogroups.com
  • Subject: [nafex] Greenhouses
  • Date: Fri, 13 Apr 2001 09:07:09 -0800

I have enjoyed the group discussion on greenhouse glazing. For my 14' x 18'
greenhouse I put triple wall polycarbonate in the roof and double paned 1/8"
glass for the walls. Yesterday I was installing a solar powered fan in the
greenhouse. It was a nice sunny day, and after mounting the fan I set the
solar panel up next to the glass in direct line with the sun. Nothing
happened. I moved the solar panel all over inside the greenhouse but I
could not get the fan to turn. So I opened up one of the roof vents and
slid the solar panel out onto the roof and the fan took off running
immediately. I'm guessing that the solar panel needs the uv light to
generate electricity and that my double walled glass windows were screening
out too much of the uv, and the triple wall was blocking too much of the
full sprectrum light intensity. Jerry Appleseed

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  • [nafex] Greenhouses, JERROLD KOERNER, 04/13/2001

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