That?s a good point, though it does make me curious. Is the btu rating for an RV furnace based on total heat output, or only on the heat that is provided to the interior of the RV? A lot of the total heat seems to go out the exhaust vent.sadixon49 said:Keep in mind the standard RV furnace in my 26' class C is 31000 btu. I'm not sure how far even 6K btu would go.
Old Blevins said:Is the btu rating for an RV furnace based on total heat output, or only on the heat that is provided to the interior of the RV? A lot of the total heat seems to go out the exhaust vent.
AStravelers said:While the forced air heater puts 30,000BTU to the inside of the RV, it also blows another 30,000-45,000BTU of wasted heat to the outside, along with the exhaust gas. All that heat is wasted.
I generally assumed (and it is bad to ass-u-me) the furnace BTU rating was the heat output to the inside of the RV. Also figured it is the same for whole house sticks & bricks forced air furnace.Lou Schneider said:The BTU rating of a gas appliance applies to the BTU input, the amount of fuel it uses. The BTU ratings are different for different types of fuels so using BTU as a consumption rating makes it easy to compare operating costs across different fuel types......................
Propane delivers about 91,000 BTUs per gallon, so a 30,000 BTU furnace will consume about 1/3 gallon per operating hour.
Again, gas appliances are rated according to how many BTUs they draw from the tank, not their heat output.
A 30,000 BTU furnace will consume 30,000 BTU from the propane tank (1/3 gallon per hour). If it is 50% efficient it will deliver 15,000 BTU to the inside of the rig and dump 15,000 BTU outside through the exhaust.
Another point of comparison: electricity delivers 3414 BTU per kilowatt-hour. A 1500 watt room heater consumes 1.5 Kw and practically all of the energy goes to create heat (there is no exhaust) so it delivers about 5100 BTU per hour into the room.
AStravelers said:I generally assumed (and it is bad to ass-u-me) the furnace BTU rating was the heat output to the inside of the RV. Also figured it is the same for whole house sticks & bricks forced air furnace.
I tried looking for a reference to verify that the BTU ratings for these furnaces are for the gas consumption, and not the heat output to the RV/house, but have not had any luck finding a reference, rather than an opinion.
Does anyone have a reference to verify the BTU output.
AStravelers said:I tried looking for a reference to verify that the BTU ratings for these furnaces are for the gas consumption, and not the heat output to the RV/house, but have not had any luck finding a reference, rather than an opinion.
Does anyone have a reference to verify the BTU output.