Off of woodstock web site.
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Q. How do I know when my catalytic combustor needs to be replaced?
A. It’s pretty straightforward. You will notice two things: (1) your stove will produce less heat, and (2) the smoke coming out the chimney will be noticeably darker, and will have some “woodsmoke odor”. When your catalyst is working properly, it produces lots of heat. As it wears out the decline in heat output will be noticeable. And when the catalyst is working properly, the “smoke” is almost all carbon dioxide and water vapor, so it appears to be white, or light grey.
As the combustor’s performance declines over time, the smoke will appear noticeably darker.
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If the catalytic combustor didnt decline over time then why replace the unit ?
If I had the test equipment here my older stoves would prove that they preform as good or better than OEM .
I would agree that an older stove with a
NEW catalytic combustor you should get great performace , but i would not agree that after 2+ years the catalytic combustor performace is as listed to when the stove was fitted with a new catalytic combustor.
Cars and trucks do the same thing , the catalytic combustor works as it should when new but over time it looses its performace and goes downhill from use and needs replacing.
A 2+ year old catalytic combustor is not allowing the same low emissions levels as when new and the catalytic combustor / wood stove should not be expected to obtain the same g/ph as when new.
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Also off of woodstock web site.
The catalytic combustor in your stove will have to be replaced every 4-5 years. Its replacement cost (about $100) is a small price to pay for the increased efficiency, clean-burning, and peace-of-mind it offers. And, it’s much easier to replace a catalyst than a warped firebox.