Propane Question
Does anyone know how long a #20 Propane tank will run a 20,000 BTU heater continuously?
Forum Discussion
happy2rv wrote:
A 20K BTU furnace should use approximately 1/4 gallon of propane per continuous use hour. A 20# propane tank is 4.5 gallons, if filled to capacity. So, that should be 18 hours if my math is correct.
However, it is worth noting that 20# tanks, i.e. common grill tanks are not always filled to 20#. This is especially true if you use exchange tanks. Exchange tanks are almost always filled to somewhere around 15#.
Every time I had my empty 20# tank filled, it took 5 gallons to fill, our 30# tanks will take 7 to 7.2 gallons to fill when empty.
