Gallon of propane has 91,500btu
Add up your propane appliance btu/hourly rating
Water heater
*Atwood 6 gal ---8000btu
*Atwood 10 gal ---10,000btu
*Suburban ----12,000btu
Furnace......20K, 25K etc
Fridge....1200-2200btu
Stove top/Oven
1 burner...9000btu
other 2 burners....5000btu each
Oven 1200-2000btu
Remember BTU Rating is Per Hour of run time
*roughly 20 minutes per hour -----so 3 hrs for 1 hr run time
WE FTd with Two 30# cylinders
Used all appliances on propane......
*Summer time.....usually 4- 5 weeks on ONE 30# cylinder
*Winter time.....couple be week and was every other day when temps were below 0*F
