Quote:
Originally Posted by ron
as I recall , the underground house book circa 1970s says build a 12inx12in tunnel 100 ft long below the frost line and pull the house air through it,that should cool a 1000 sq ft home to 57* winter preheat or summer cooling you can use the same 20in fan and save all the complication of radiators and water,tubing etc.
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The big issue that people have had with earth tubes like that is rodents, insects, mold, mildew and radon, you end up with a lot of basement like surface area that you are pulling air from while a radiator is very easy to keep clean and you don't have to worry as much about rodents moving in or a heavy rain storm causing it to fill up with water.