I IngridErik Guest Dec 13, 2009 #1 do I need for furnace.? Also 80% or 95% which should I get, or does it matter. I don't care about the tax credit, I want to lower gas bill over winter time...
do I need for furnace.? Also 80% or 95% which should I get, or does it matter. I don't care about the tax credit, I want to lower gas bill over winter time...