Greenhouse Heaters and Heating Systems - If you're in a cold climate, heating
can be a major expense. You can start simple with a wood stove or go complex with a multi-fuel boiler with a radiant floor. Most greenhouses have a gas heater with automatic temperature control.
Wood Stoves - If you have wood available and don't mind a little extra work, this a economical way to heat a small greenhouse. For larger spaces, try a wood
burning boiler.
Lehmans offers all the major brands of wood heating and wood cooking stoves.