How many BTU's of HEAT rise up out of the ground per square foot in the winter ?or... how can i measure it myself?
It is a little known fact, but 60 degree HEAT is under the ground, and it RISES UP out of the
ground. I know, because i used it to "heat" my house last december. My house didn't get colder than
about 60 degrees, even though the outside temperature got down to 35 degrees... and i kept my furnace OFF. I tried to search the internet for information but cant find anyone else who mentions it.