We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › The most glaring difference between a greenhouse and a high tunnel or cold frame is the ...

The first deal on our list is a sub-$40 heater that uses PTC ceramic heating technology: The SISUPASSIE 1500-Watt Portable Heater can warm up to 200 square feet, and warm it up quickly. A handle and a ...

The PV-powered geothermal heat pump system was tested for a year, with measurements taken by Researchers at the University of Nottingham. The UK group showed it was able to maintain an indoor ...

[Bigelow Brook Farm] has a cool geodesic dome greenhouse that needs to stay warm in the winter. There are a lot of commercial solutions for greenhouse heating, but if you’re the kind of person who ...