They just looked in the crawl space and said 'they can handle a 3 ton, but no bigger'. No testing involved. Nobody mentioned a manual j calculation. I think they said I had a 6" going into the bathroom.
K, I did the manual j (guestimated best I could) how do I interperate the results? I've got a heat gain # and a heat loss #. Which # do I use and what do I divide it by to get the tonage I should use?