how do you heat your greenhouse
I live in Ohio and I recently purchased a new greenhouse 10 X 14 walls made out of waffle plastic panels, it is quite different from what I am used to. I currently have 2 heaters in it and it doesn't seem to keep the temperatures quite as consistent as I would like. And of course DH is starting to complain about the electric bill going up.
I was considering looking into a commercial type heater, but I am not sure what to look for. Please give me your opinions on varies types that you use.