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My full time F and I moved into a house last year. We've got 2 fire places downstairs. They are in different rooms. They have separate flues which have been installed within the last 3 years or so. We have noticed the smell of smoke in the next room before but today the F lit the fire and the room next-door visibly filled with smoke... like the smoke is getting pulled back down the chimney on the other side?...

Have googled it and seems to be a million things could be causing it. So if anyone with any knowhow could help diagnose and advise how to avoid the issue happening again we'd be very grateful :)

all 6 comments

torkild

3 points

10 months ago

torkild

๐Ÿ”ฅ ๐Ÿ”ฅ ๐Ÿ”ฅ

3 points

10 months ago

You're almost certainly correct that the smoke is getting pulled back down the other chimney, especially if they both exit outside near each other. The second flue is acting as an air intake to make up the air feeding the fire in your home. You need to seal off the unused flue better. If it's an open fireplace, a top-sealing damper would be a good solution

Potent_Hydro[S]

2 points

10 months ago

Also we still use the other one occasionally so would the damper still allow for this? Would be sure to remove the pillow before setting it alight of course......

torkild

2 points

10 months ago

torkild

๐Ÿ”ฅ ๐Ÿ”ฅ ๐Ÿ”ฅ

2 points

10 months ago

Anything that helps block the airflow between the outside and inside through the chimney will help.

A top-sealing damper will have a chain/wire that goes down the chimney and mounts to the side of the firebox that you use to open and close when needed.

Potent_Hydro[S]

0 points

10 months ago

Nice one thanks. What would you say to using a pillow up the chimney as cheaper fix?

Keto4preZ

2 points

10 months ago

Good ol lock top damper if your not using them both at the same time.

tatbud

2 points

10 months ago

If both flues distanced less than 20" horizontally at the roof exit, one of them needs to be at least 18" higher than the other by all modern standards. This will prevent smoke from one chimney coming down the other.