Posted 11/20/2009 11:12 (#931706 - in reply to #931252) Subject: RE: Definitely insulation pays fastest.
For sure insulation pays faster than the most efficient heat sources. And it can be added progressively. So I just put in a 95% efficient furnace that I got in three days instead of a pricey geothermal that may have taken all winter to get installed. I'll add to the insulation later.
Geothermail heat systems
