I do agree the 175 is too big, so my decision is between the 125k or the 150k. The 125k is 99,600 output, so approximately 38 btu sq/ft, 150k is 124,500 output, around 48 btu sq/ft. Really don’t want to be on the small side if and when the 16x10 garage door is opened. I thinking the 150 would...