I have two 75,000 btu Modine greenhouse heaters and I never have any sepal burn even though there are plants within 15 of the heater. Mine are hung in welded steel cradles that sit on patio stones. Anyone that wants a photo of the cradles should contact me off line. The further specs for spacing of the hanging bolts are in the manual for the heaters. You should not get any damage from combustion gases because they have a power vent. The only thing I would suggest is to not put the vents at chest height as the installers like to do, but make them put a couple of elbows in and then put the vents ¾ up the side of the greenhouse---two reasons: first that way you recover some of the heat lost out the vent as it warms the length of the vent, and secondly if you live somewhere where you get heavy snows or drifting, the last thing you want is the outlet to become plugged by blowing snow or driftsand yes it can happen. And never ever install the heater on the side wall where snow sliding off the roof can build up. . .It isnt fun to have to get up all night to shovel the vent out, which I had to do with my first greenhouse where I had a Hunter, similar to Empire, direct vent heater. These also rust out fairly quickly and I had to replace the supplied thermostat with a heavy duty one as the supplied one corroded within a year in the greenhouse. I also have a friend that installed a boiler system designed for homesthey had constant problems until they moved it out of the greenhouse and into an attached shed because of the humidity in the greenhouse. Bottom line is: buy something designed for greenhouses and high humidity. You can buy the Modines with stainless steel or aluminum insidesthe stainless has twice the guarantee.
Windsor Greenhouse RR 2, 345 Gabriel Rd, Falmouth, NS B0P 1L0 866-798-0514; FAX 902-798-1131 [EMAIL PROTECTED] www.windsorgreenhouse.com _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
