That is how they work I guess, several posts here and other forums say around 40 or less you need to go with the furnace.
If you want to keep your propane usage down then use a space heater of your choice.
Do you have skirting on?
Is your water and drain hoses insulated and covered?
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
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