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Old 02-27-12, 07:36 AM   #23
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Originally Posted by Plantman View Post
Are there any ways to improve efficiency of zero-clearance fireplaces? I have one in the house I bought and would rather improve its efficiency than replace with a wood stove. It has a fan for the heat box and I have connected it to outside air, including an inline fan. I have also made the glass doors more airtight by applying high temp caulk to the folding edges of the glass so they seal when closed, and added door gasket material to the outer edges of the door. I still don't always get good combustion and would like to improve it.
What is the problem with the combustion? Are all the flames going up the flue, or is there a lot of smoke coming from the chimney?

We need specifics!
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