Not sure what compartment heaters are. ? As far as I know (as mentioned) there is a 2" or so flex duct off the furnace that simply sticks down into the front tank area. It will only keep the tanks and lines from freezing if the propane furnace is on. If you have electric heated tanks, the heaters will prevent them from freezing, but will do next to nothing for the fresh water pipes.
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2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch. 5 step glow steps
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS
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