[jsb5717]

Last Summer, when it was 100 degrees or more, I started noticing that very hot air was belching into the coach from the return vents under the stairs…not helpful. I recently opened up the basement wall to take a look. The entire coach is set up to breathe far too easily. There were 2 large holes through the floor into the underbelly, tank area. Through those were plumbing and ducts (to keep that area from freezing in the winter). There were also 2 holes in the wall behind our hutch in the living space into this utility space. There was also space above the basement wall between the floor joists so that the utility space could also breathe into the storage space. All of that allowed for a free flow of air. It was clear that the return vents weren’t really true return vents since the furnace could burn available air from various sources…rendering the furnace even less efficient. I set about to seal every hole…which I did. Rigid foam to insulate and seal the wall behind the hutch…no more holes there. Pieces of rigid foam and spray foam to seal the gaping holes into the underbelly. Rigid foam pieces along the top of the storage wall. Now the only air that the furnace can breathe has to come from the coach so the furnace is a lot more efficient. I’m also hoping that there will be no more belching of hot air into the coach from underneath. Haven’t had hot weather yet so can’t tell yet but it’s got to be an improvement