RV LP Furnace Efficiency?
I'm trying to find the actual efficiency rating of our Suburban RV furnace... but so far have found no published specifications. Anyone have the real world efficiency rating of the typical RV LP fu...
Forum Discussion
JaxDad wrote:beemerphile1 wrote:sidney wrote:
...Anyone have the real world efficiency rating of the typical RV LP furnace. I'm guessing 70 to 75%....
Why guess? Do the math. Look at the label on YOUR furnace. Divide the output BTU by the input BTU.
That only gives you the combustion efficiency, it does not account for the heat exchangers efficiency.
A typical RV furnace is only ~70% efficient.
I disagree. stated BTU output on a furnace is the BTU output through the heat exchanger. E.G. the BTU of the air coming out of the heat exchanger. BTU input is the BTU of propane or NG going into the burner.
combustion efficiency on a gas furnace is very close to 100%, like most any external combustion vapor fueled appliance.
