Usually different orifices.

--
Christopher A. Young
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..


"Jimw" wrote in message
...
I'm looking to replace an old oil furnace on a rural
property with a
propane furnace. I intend to do it myself. Since the
property is
just a hunting cottage I am not looking to spend a lot. I
am actually
looking for a used furnace if I can get one. My question is
whether
gas furnaces are specifically made for natural gas or
propane, or are
they all the same and just need a different orfice(s)
intalled to
match the type of gas used? Anyone know?

Thanks

Jimw