No, a stage LP furnace isn't more efficient in the lower stages.
And they do have 2 stage oil furnaces.
Very interesting and, to a layman, counterintuitive.
One would think that operating at a lower stage would be more efficient in addition to possible comfort benefits.
Originally Posted by beenthere
I must look into the multi stage oil furnaces. Got any favorites or recommendations? Thanks-
In teh lower stage they provide more comfort.
But, if the house needs 40,000 BTU's it need 40,000 BTUs weather in first or second stage. So it burns as much and some times more fuel in first stage.
But makes the house feel much more comfortable.
Thermopride, Lifetime limited warranty on the heat exchanger. Built like a tank, and weighs half as much as one.
oil and heat pump..
Never saw a furnance that the nozzle couldnt be changed here in oregon...
Depending on electricity rates, the heat pump could be the best solution for 80% of your heating, with oil [ it never explodes like LP] for those below 20 nites with 40 MPH winds.....
you can compare fuels easily with calculator at:
I called Williamson, who made my furnace, and was told "no nozzles changes". (more)
I reason per the tech guy I talked to is that a lower than the std 1 gal per hour nozzle will cause the combustion chamber to run too cool and form condensation that will eventually kill it. He was quite certain on this.
Originally Posted by fixitguy
Funny you should mention propane being explosive. Just saw in article in my local paper that this happened recently. Whether due to a leak or stupidity is not yet known.