Your furnace is totally 12v DC, just like the lights and radio, other than using propane for making heat.
But you'll need someway to recharge the batteries, since the furnace fan is the biggest power hog in the RV.
A single battery can be emptied in 6-8 hours, if it runs a lot.
So you'll need shore power or a generator to recharge the batteries.
And don't expect that just driving will totally recharge a fully depleted battery.
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Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
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