Re: Smoke from fireplace in basement
Sounds like the abandoned flue isn't totally closed off in the basement which is where the smoke is coming from.
Now, there needs to be a reason for the smoke from the fireplace entering that abandoned flue in the first place. Either the problem is at the top of the chimney where the abandoned flue is supposedly closed off ---- or ---- there is a leak between the fireplace and the abandoned flues somewhere inside the chimney.
That would be my guess.
"" an ounce of perception -- a pound of obscure "