Designed for small greenhouses, the Bio Green Palma Greenhouse Heater puts out 5,200 BTU, enough to heat 120 square feet. This electric space heater has a built-in circulation fan and draws 1,500 ...

To use this small greenhouse heater as part of a solar heating system, you’ll need a PV panel array and an inverter to convert direct current (DC) from the panels to alternating current (AC ...