Seven Gals in the max capacity of 30 Lb propane tanks, but are generally filled to only 80% of capacity, so probably 5 or 6 hours under load would be about right.
We have dual 40 Lb tanks that again are rated at 10 Gals, but running both ACs can burn through a tank in approx 8 to 9 hours.
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Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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