*TEASER WARNING*
I have a couple old window AC units sitting in the garage, and this forum has really got me thinking about putting them to use.
When I get a chance (among the many projects I intend to tackle) there is a spot in the garage wall that I can easily knock out and put one of the units in backwards. I'm just curious how much heat a little 6,000 BTU window AC unit can actually put out when the outside temp here in Michigan is in the 20's, or if it will even work at all. I figure the garage is a good enough place to start, as I do go out there and work from time to time. At least I can experiment without cutting holes in the house or ductwork.
I'll give it a shot as soon as I can and keep you all posted.