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Old 01-01-2010, 12:33 PM   #1
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Smoke coming out of fireplace


I've got a majestic fireplace/flu installed, but am noticing a considerable smoke smell in the house/cabin. A flashlight beam above the fireplace did show wafting smoke coming out the front face of the fireplace.

Checked the flu, and it was wide open.

Any ideas?
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Old 01-01-2010, 12:57 PM   #2
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Smoke coming out of fireplace


Is this all the time or just occasionally?

Is it cold outside? where are you? dd you 'warm up the flue' before lighting the fire?

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Old 01-01-2010, 01:15 PM   #3
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Smoke coming out of fireplace


is this new construction with all masonry or insert. sometimes what is called the smoke shelf inside the firebox is not deep/tall enough and any change in outside temp or wind will make the smoke roll to the inside. I know of no fix for this. Has this always been?
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Old 01-02-2010, 06:04 AM   #4
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Smoke coming out of fireplace


There are a number of reasons that this could be happening.
1. Air starvation. If opening a door or window helps, this could be one of the causes.
2. The size of the flue in relation to the fireplace opening.
3. The design of the throat and the flue.
4. If the lining is leaking cold air into it.
5. If the flue terminates where wind could cause a downdraught.
Ideally you need an on site inspection. You don't want any leakage of carbon monoxide, even slight ones.
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Old 01-02-2010, 06:13 AM   #5
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Smoke coming out of fireplace


Chimney at least 2' above nearest house roofline.
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Old 01-02-2010, 06:32 AM   #6
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Smoke coming out of fireplace


Stewart45 gave you the things to look for.
Often the problem is caused by the furnace/return air causing negative air pressure in the room.

Do you have forced air heating? Does the problem occur only when the furnace is on?

Keep us posted--You might have to call in a pro if the solution is not obvious.--MIKE--
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Old 01-02-2010, 12:46 PM   #7
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Smoke coming out of fireplace


Try burning kindling and light wood at first to warm up the flue, and put the heavy stuff on the side to dry out. There needs to a hot updraft in order for the smoke to be pulled out(this includes air getting in).

You might want to compare the dimensions to those standardised ones, to see if it is built correctly.

I'd also recommend a $60 CO/Gas alarm, which is much cheaper than the alternative.
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Old 01-03-2010, 04:38 PM   #8
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Smoke coming out of fireplace


Just based on the photo, where it appears the top of the opening is in line with the height of the wall switches. Fireplaces have very specific dimensional requirements which are mandatory for proper (i.e. smoke free)operation.

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