This video shows you how I heat my house with my greenhouse! Its so easy to do and it gives us (almost) free heat and many other benefits too. This could easily be an off grid way to heat a house.It works all fall, winter and spring. It does not matter what the temp is outside, as long as the sun is shining we get virtually free heat. This can save quite a bit of money every year and it will add value to your home.This green house serves as insulation from the heat in the house leaving. In effect the greenhouse reduces the amount of exterior house in contact with the harsh winter cold.Even at night when no Sun is accumulating in the greenhouse, the greenhouse is acting as an “air blanket” for that section of exterior wall/window/door.