The A/C issue is the most critical as heat is instant and there are several alternatives for space heating-electric radiant-recirulating hot water-electric blanket-fireplaces and now I understand heat pumps....which is A/C in reverse down to what?...50 degrees?....There are NO 4 season trailers made to my knowledge [because of lack of insulation]....and most salespersons say the same thing....though some have an upgrade insulation package....which might be an advantage...I'd have to have it looked at. There are some things that a person can do the upgrade existing insulation-which takes some planning and a little money which will make a big differance in the HVAC issue. I'd rather build it correctly than retro it later....I've done my house over the last few years and I'm tired of drywall dust etc-buts it's done now so I'm expermenting on/with the Airstream currently....geof
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