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I am installing a Breckwell G29I gas fireplace in an existing fireplace previously used to burn wood. I need to squeeze the 4" aluminum flex liner through a small flue damper space. It seem to only open about 3". How much compression is possible/allow
Posted by Elite Deals - Chris M. on 24 October 2013 03:29 PM

Our Answer:

Although it is always better to remove the damper throat to gain better access for vent pipe installation, aluminum liners can usually be compressed up to one inch to fit through the damper throat. Because of the fact that you are already at this limitation, I highly recommend considering removal of the damper. Otherwise, you will need to be extremely careful when feeding the liner through the damper area, as it can unravel if placed under too much stress.

In Response to Question:

I am installing a Breckwell G29I gas fireplace in an existing fireplace previously used to burn wood. I need to squeeze the 4" aluminum flex liner through a small flue damper space. It seem to only open about 3". How much compression is possible/allowable?

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