Smell of wood smoke in duct work.

Kwhelan

New Member
Mar 21, 2020
5
Newfoundland
Hey, looking for some advice. Currently have a new Benjamin fs140 wood /oil hot air combo installed in a new home. First time using the wood stove and it smells of wood smoke coming out of the registers. I have had the oil burning about 2 months and so the new smell is gone and there is no smell of fumes while the oil is burning. Any thoughts on what this problem could be? Thanks
 

woodey

Burning Hunk
Feb 8, 2018
134
ST. Lawrence Valley N.Y.
Were there strong winds at the time you smelled the smoke? Had the same issue a few weeks ago it was a simple fix with my set up.
 
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Kwhelan

New Member
Mar 21, 2020
5
Newfoundland
No just a light wind. I wonder would it be possible for smoke to get sucked in the house from outside. I let the fire go out, then relite it and the smell became stronger again
 

brenndatomu

Minister of Fire
Aug 21, 2013
4,816
NE Ohio
What are your chimney specs? Could be the chimney is ok for the forced draft oil burner, but not ideal for the potentially lower flue temps of the wood side...low draft can cause smoke smell in the house.
How old is the house? Is it very airtight? A "too tight" house can cause smoke into the house due to the natural draft wood side not being able to get enough makeup air...try cracking a basement window open next time...see if that affects it...
 

woodey

Burning Hunk
Feb 8, 2018
134
ST. Lawrence Valley N.Y.
Sorry, I misread your post as my issue was a slight creosote smell (not smoke) on a very windy night. Called Lamppa and problem solved easily by slightly increasing draft via Baro. damper.
 

brenndatomu

Minister of Fire
Aug 21, 2013
4,816
NE Ohio

Kwhelan

New Member
Mar 21, 2020
5
Newfoundland
What are your chimney specs? Could be the chimney is ok for the forced draft oil burner, but not ideal for the potentially lower flue temps of the wood side...low draft can cause smoke smell in the house.
How old is the house? Is it very airtight? A "too tight" house can cause smoke into the house due to the natural draft wood side not being able to get enough makeup air...try cracking a basement window open next time...see if that affects it...
The house is a new build, in the finishing stages. Chimney specs are 7 inch, that’s what it calls for. I can open my furnace door while the fire is burning and no smoke will come through the door. For some reason when I go up stairs I smell burnt wood smoke. Has to be coming through the registers I figure and getting recirculating in the house.
 

brenndatomu

Minister of Fire
Aug 21, 2013
4,816
NE Ohio
Has to be coming through the registers I figure and getting recirculating in the house.
Is the furnace new? If it is old, it could be there is a hole rotted in the firebox and/or heat exchanger...that will give you a smoke smell in the house easily.
Even if it is new, could be there is a gasket out of place, or weld that was not done correctly...it happens.
 

begreen

Mooderator
Staff member
Nov 18, 2005
81,921
South Puget Sound, WA
Is the furnace in a basement? In a tight new house this could be a negative pressure zone. Does the furnace have an independent fresh air supply? Is there any smoke smell in the basement?
 

Kwhelan

New Member
Mar 21, 2020
5
Newfoundland
Is the furnace in a basement? In a tight new house this could be a negative pressure zone. Does the furnace have an independent fresh air supply? Is there any smoke smell in the basement?
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There is a return air in the basement and upstairs. Furnace is in the basement. No smell in the furnace room say just the upstairs and rooms in the basement.
 

brenndatomu

Minister of Fire
Aug 21, 2013
4,816
NE Ohio
Chimney specs are 7 inch, that’s what it calls for
Right...I saw that...but what is the overall height, is it masonry, square or round flue, lined, with insulation? Or SS class A?
 

RockyMtnGriz

Member
Apr 19, 2019
44
SW Montana
New door gaskets tend to need a couple of snugging-ups before they are reliable. Depending on the return air setup, a wisp of smoke from the door could be sucked into the return air and not be very noticeable near the stove.