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Tropicanna Clemmons, NC(Zone 7b) Oct 29, 2007

I have an 8x8 Rion here in 7b and I really needed to have a heater for it yesterday. Using a calculator on a site it said I needed almost 12,000 BTUs to keep it above 60 degrees--seemed a bit much to me considering we don't always get that cold during the day. Definitely going for electric . I see that some people have used space heaters for their GH but also see the GH heaters online.

What's the difference between using a space heater (as in for the home) and a GH heater or are they the same?

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ecrane3 Dublin, CA(Zone 9a) Oct 29, 2007

The difference is most space heaters for the house probably aren't rated for outdoor use, which means they wouldn't be a good choice for a greenhouse. But if you have one that's rated OK for outdoor use then it should do just the same as a greenhouse heater that delivers the same # of BTU's

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stressbaby Fulton, MO Oct 29, 2007

Tropicanna,

Quoting:
A space heater is a self-contained, free standing air heating appliance intended for installation in the space being heated and not intended for duct connection.

http://www.cpsc.gov/CPSCPUB/PUBS/463.html

By this definition, practically every GH heater is a space heater!

If you have at least 30amps to your GH, you can almost cover that 12K BTU with a couple of milkhouse heaters, 1500W, 5120 BTU. I saw them at WM for under $20 this past weekend. They all have tipover switch. The thermostats are crude but serviceable. The usually have a small fan to circulate the air. I supplement with two of these. Use GFCI and use great care if using an extension cord.

SB

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Tropicanna Clemmons, NC(Zone 7b) Oct 30, 2007

thanks SB, I'm going to check at HD and Lowe's (can't bring myself to go to big W) today for the milkhouse heaters, that's exactly what I was looking at---how big is your GH?

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stressbaby Fulton, MO Oct 30, 2007

My GH is 20x23. (I heat primarily with 2 Empire 24K BTU vented propane heaters.)

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Tropicanna Clemmons, NC(Zone 7b) Oct 30, 2007

whoa, the big dogs! thanks so much for taking the time...I'm sure I'll have another question shortly..lol...beginners

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