Mine is a Suburban 45,000 BTU it does good. I turn it on to heat it up quick then turn on the 2 electric heaters to keep it warm after that if we are hooked to shore power.
45,000 would be way to big of a furnace for your unit though. If your hooked to shore power use some ceramic electric space heaters.
2014 Palomino Columbus 3650TH
435AH 12V VMax Charge Tanks, 520 watt Monocrystilline Solar Array, Morningstar MPPT TS-60 CC,Morningstar Remote,Cotek True Sine Wave Inverter,Cotek Remote Controller,50amp Progressive Hardwire Surge Protector
2015 Dodge 3500 6.7L 4X4
2011 CanAm Commander XT 1000