MR> --- on the topic of "Furnace fan?"

MR> JE> Mike, down here we do not have to worry about creosote build
MR> JE> up, oil burning or the like. We do NOT use OIL or coal - We
MR> JE> use natural gas as does a very large percentage of the USA
MR> JE> now days.

MR> JE> Therefore not many blanket statements as to flues/chimneys
MR> JE> etc. can apply to heating or cooling systems. Wood
MR> JE> burning fireplaces yes, but central heating - no. Even many
MR> JE> of our so called fireplaces have artificial ceramic logs
MR> JE> that are heated by natural gas!

MR>It's true and in the case of gas you would more likely be trying to
MR>avoid water condensation causing corrosion. However, IIRC some gas
MR>furnaces are so efficient that the exhaust can be safely vented using
MR>a clothes drier flexible hose but that's just hearsay.
   1
Condensation definitely was a problem with the older gas
furnaces which used a constantly lit gas flame pilot light.
For quite a number of years now the furnaces use an
electronic spark pilot light thus a very minimum of
condensation.

So far as the flexible hose is concerned I haven't heard
anything like that. Since virtually all of our gas furnaces
vent through the roof and the normal city codes call for a
double walled vent pipe - tisn't so here at present.

Jay

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