assuming i get an install from someone that obeys correct procedures, is it reasonable to assume some heat would work its way into the kitchen (that what the enclosed porch leads to) if i left the door open? all my finished space is ducted/vented for gas forced air. the porch isn't ducted/vented, or anything else. just a big porch i enclosed with framing, siding, and floor, wall, and ceiling insulation. i'd like to be able to relocate my washer/dryer stack to out there, and leave the door open in the pennsylvania winter for a "free ride" (i've got 5 wooded acres). thanks