Another issue that I'm having a hard time with (and seems to be the rage with energy auditors) is a sealed crawl space under the house. No foundation vents and then a air "conditioning" system. And I don't mean cooling, but a humidity control and/or air exchanger. Anyone run one of these and have an opinion?
We haven't done it yet but are thinking about it. We currently have a crawlspace w/ batt insulation in the rim and poly over the dirt floor. We're considering spray foam in the rim and "industrial" batts on the walls with the poly tucked under the bottom (and probably taped at the seams/overlaps.) Basically you're continuing your conditioned space down about 4'. We do have a couple of finned sections of hotwater baseboard in the crawlspace already. We haven't had moisture issues here in Chugiak with the current set-up but we might need some sort of a vent/exchanger if we change.
