Ours has worked well into the upper 30's but it won't do a good job on the living area no matter what because the heat is coming from the ceiling causing the cold air to pool on the floor where you're sitting. We use a small electric heater for that. If it's going to be below freezing we don't use it anyway because we need the furnace to protect the pipes and tanks.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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