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Francie 11-15-2010 08:12 AM

venting oil furnace in Maine
 
hi
I currently have a power vent attached to my oil furnace. It has not worked well for years so now I want to exhaust through a metal chimney. Will it work just as well to go out the side, using the power vent opening and than a 90 elbow and up? I have been told that it must go up 4' for any surface within 10'. Do I have to use insulated pipe? I live in mid-coast Maine. My furnace room is in a single story ell attached to a two story house. Thank you PS.Any suggestions for an economical source for the pipe?

wombosi 11-15-2010 06:40 PM

yes, you'll be fine to go out and then up, though the "out" must be pitched upward slightly.

you'll need double wall metalbestos piping. in my area the cheapest i've found is about $150 for a 4' section.

measure out the height carefully and go to a plumbing/heating supply house. factor in 3-4' past the roof line.
the pipes twist together to connect.
you'll need a minimum of 2" air clearance to all combustibles.

call up your building department for exact code requirements on this. technically it requires a permit.

good luck.

Ron6519 11-16-2010 12:06 PM

Quote:

Originally Posted by Francie (Post 534541)
hi
I currently have a power vent attached to my oil furnace. It has not worked well for years so now I want to exhaust through a metal chimney. Will it work just as well to go out the side, using the power vent opening and than a 90 elbow and up? I have been told that it must go up 4' for any surface within 10'. Do I have to use insulated pipe? I live in mid-coast Maine. My furnace room is in a single story ell attached to a two story house. Thank you PS.Any suggestions for an economical source for the pipe?

I'd find out why it wasn't wasn't working correctly before I changed the recommended venting course. These are not generally designed to fail. It could be a component or an improper install.
I'd have a competant service tech check it out.
Ron

wombosi 11-16-2010 03:48 PM

i was speaking with an heating tech the other day on a house i'm working on. took down a chimney and was wondering i could direct vent the oil fired boiler.
the guy said there is a way with these "power vents," but that they're so inherently crappy and always breaking, that basically no one uses them.

so i think the OP wanting to switch to an actual chimney is a better bet.
just my opinion, relayed second hand.


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