Chimney baloons and pillows

Do you have a wall vent ot trickle vent already in the room, if so did closing your chimney is not an issue with what ever closure item you go for..

You have to allow some ventilation in the chimney to avoid condensation problems down the line.
Leo
 
Yes - my understanding what that room ventilation is one thing but ventilation of the chimney flue is another. You need both.
 
The pillow trick works for me, flexible and not entirely sealing. Don't intend lighting a fire ever again! trouble is, I'll probably forget to remove it and suffocate Santa.....
 
Just read through the above posts but still unsure. I have 2 never used fireplaces in my 2 childrens bedrooms. Most mornings they wake up and complain that their throats are dry. We have trickle vents open in their bedroom windows but I'm assuming (perhaps wrongly) that all the moist air is escaping through the open unused chimneys. These fires will never be used and I was thinking of climbing on to the roof and closing the chimneys off at the pots (with a few drill holes for ventilation). Is this a good idea?
 
Why don't you test your hypothesis by getting a hygrometer to check the air humidity before climbing onto the roof!? Seems a bit premature to pin the blame for the sort throats on one specific possibility without more investigation.
 
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