Hi Mikey-

Welcome to the forum...If you haven't already, I suggest you attend and think about becoming a member of Coastal Carolina Orchid Society...

http://www.coastalcarolinaorchidsociety.org/

We're a great group of orchid enthusiasts, and have great speakers and fun at our meetings. Visitors are always welcome!

c.

PS- Depending on the size of your greenhouse, you might want to try 1 or more oil filled, electric, radiant heaters. I have 2 in my 11'x22' greenhouse (DeLongie sp?...from a home store) that do the trick. They have built in timers and thermostats, and you won't have to worry about gas fumes. I bought a Southern Burner vented gas heater several years ago, but I don't think it does as good a job or is any cheaper than 2 electric heaters. Good luck...