****. That was on the road? I saw a truck a few years ago rusted out in the same spot. I swear the only thing holding it together where fuel, brake lines and such.
So far so good. The stat is designed to minimize temperature swings so sometimes the unit only runs for 5 minutes. Just long enough to exchange the floor water. The heat is even and quiet. And propane use seems acceptable.....so far. I have to remember im heating 1500 square feet more with 15 foot ceiling and 3 garage doors.
I don't recall if you have them, but a few ceiling fans running @ low speed would probably help too. I've worked hanging pipe in warehouses where it was cool @ the floor level and quite warm at the ceiling. Awesome place you built!