I need some help/advice. We live in Georgia and we have developed some issues with humidity/mold in our crawlspace. Our furnace is also in our crawlspace, 80% luxaire furnace that runs on propane. We are enclosing/encapsulating the crawlspace which involves a new vapor barrier, insulating the walls, sealing the vents etc. I understand our current furnace can't have air vented in so I will need a new furnace with is a two-way/direct vent, whatever you call it. Here are my questions.
1.)Do used perfectly working furnaces have any resell value, the unit is about 6 years old.
2.)I plan on not sealing the vents since the current unit needs combustible air until it is replaced, I have 11 vents in our crawl space, is this adequate air for the furnace? Could I close the vents in the summer when we are not using heat? Im assuming the blower for the a/c doesnt need combustible air. The home is 1500 sq ft.
3.)After enclosing the crawl would a heat pump be another option also instead of the propane furnace? I don't know jack about heat pumps.
4.)Ballpark what can I look to spend on a 90/95 % efficient furnace/heat pump including installation?
Thanks so much for any help,