How big is the green house? Can you line the south side of it with 30 or 55
gal drums filled with water and painted black or dark green? With the sun
shining on them during the day, they will hold the heat most of the night.
If it were big enough you could put a single row of drums on the south side
and stack them 2 high on the north side. I would even try 5 gallon plastic
buckets if you don't have room for drums.

Dwayne



"Chuckie" wrote in message
oups.com...
I am hoping to grow plants with hydroponics starting in January. My
problem is that my greenhouse does not hold heat very well. I have
tried methods like hanging fans from the ceiling to pull the heat back
down to the floor. This works but not well enough if it is 30F outside,
the house is at 55F.
I have no duct work run because of my limited budget. I have the house
insulated. It has a 10000 BTU propane heater and it seems that all of
the heat escapes out of the top of the greenhouse. It is a clearspan
greenhouse.
I need to reside at 70F.
Any suggestions would help.
Thanks
www.clearspan.com
www.teksuppy.com
www.farmtek.com

All or nothing is the wrong approach.
Chuckie in the frozen north zone 5