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-   -   Fireplace insert flue closure air-tightness (http://www.diychatroom.com/f17/fireplace-insert-flue-closure-air-tightness-34160/)

fishmanflats 12-21-2008 11:35 AM

Fireplace insert flue closure air-tightness
 
I have a fireplace insert (NG), the insert is sealed and has a separate cold air intake and exhaust line. It was installed summer 2007. The contractor said that they used rockwool in the flue/damper. I was checking the house for airleaks and i noticed that air is moving into the fireplace. Is this a safety issue or did the contractor not fully seal the flue/damper? If not, can I or should I install more rockwool?

Thanks in advance,
Mike

yuri 12-21-2008 12:17 PM

The rockwool may be used to fill the gap around the liner and has nothing to do with draft. In really cold weather those chimneys can ice up so I recommend my customers run them once a day. It can get a downdraft due to the chimney getting cold and losing any natural updraft. Try run it and keep the chimney warm or you may develop pilot outage problems.

fishmanflats 12-21-2008 12:29 PM

combustion box
 
The combustion box is completely sealed unit. I seem to have a natural updraft from the room. The top of the chimney has a cap for the intake and exhaust. It seems the contractor failed to secure the cap, my guess. Should i be expecting the updraft? I have a Kozy Heat Jackson XL.

thanks

yuri 12-21-2008 12:44 PM

Hot air rises, so if the cap is not sealed properly then you will get an updraft/leak. Call him back and be nice about it or he may get cranky and not do a good job.

beenthere 12-21-2008 04:32 PM

Quote:

Originally Posted by yuri (Post 200916)
Hot air rises, so if the cap is not sealed properly then you will get an updraft/leak. Call him back and be nice about it or he may get cranky and not do a good job.

Sounds like he already didn't do the best job. :)

yuri 12-21-2008 06:20 PM

I don't do good work for people who yell at me. If they are reasonable, yes. Mistakes do happen.

beenthere 12-21-2008 07:11 PM

I still do good work.

It just takes a bit longer.

And there is absolutely no price break on anything.

yuri 12-21-2008 07:19 PM

Amen.


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