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Old 11-15-2010, 07:12 AM   #1
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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?

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Old 11-15-2010, 05:40 PM   #2
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venting oil furnace in Maine


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.

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Old 11-16-2010, 11:06 AM   #3
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venting oil furnace in Maine


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Originally Posted by Francie View Post
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
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Old 11-16-2010, 02:48 PM   #4
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venting oil furnace in Maine


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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