Secondary Combustion to Reduce Fireplace Emissions

One way to reduce emissions from a wood burning fireplace insert is to utilize another combustion chamber downstream from the fireplace where the logs burn.  This process, called secondary combustion, re-burns the hot gasses at very high temperature in a small chamber just after they exit the fireplace.  In contrast to catalytic converters, secondary combustion does not need routine maintenance to replace spent converters, so operating expenses are lower.  While, emissions are generally slightly higher, many wood burning fireplace inserts using secondary combustion meet EPA phase II standards.

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