Does any one have experience with the CAB50? i was looking it over and seemed like a good built unit but looks are not always what they seem. My house is single story with 2x4 walls built in 77' with newer pella windows. 944sqf main floor and same in basement. i would like to install it down in the family room. i have the origanal boiler from 77 so its very propane hungry. Basement is getting insofast 2.0 insulation and drywall in a few weeks, plus sill plate is getting spray foamed.