I heat my greenhouse with a little portable electric heater right now and I am getting a Karosine heater from someone local that used it in their greenhouse until they piped gas out from the house. She used the Karosine heater for @ 2 years. We are considered zone 5 and 6 here in Idaho. The electric heater that I have in my greenhouse works great! The coolest that It has gotten with the heater is @ 55F or so. It automaticlly takes a break when the heat gets to a certain temp. I Really like my greenhouse that I got from Harbor Freight! and I also got some aluminum tape and taped around the panels to keep the greenhouse sealed and you can use bubble rap to insulate the greenhouse as well.
|