Where Does a Catalytic Combustor Fit in a Wood Burning Stove?

A catalytic combuster reduces pollution emitted by a wood stove.

Modern wood stoves use a number of innovative technologies to make them more efficient. The catalytic combustor reduces pollutants emitted by burning wood and is one of the important parts of many modern wood stoves.

Operation

Burning wood emits gases that are burned a high temperature. However, a wood stove does not always burn hot enough to consume these gases. The catalytic combustor works by using a catalyst that reacts with the gases to lower their combustion temperature. This reaction causes more of the gases to burn, which reduces the amount of smoke and other pollutants emitted from the stove.

Location

Catalytic combustors are located above the firebox and before the stovepipe. Many stoves have a separate compartment above the firebox to house the combustor. The exact location of the combustor will vary depending on the model and design of the wood stove. Combustors have an unusual honeycomb design that simplifies their identification.

Replacement

Catalytic combustors use noble metals that react with the smoke. These metals will deteriorate over time and require replacement. Stove owners should consult the owner's manual for their stove for the recommended replacement interval. A general guideline is to replace combustors at least every six years.

References

• U.S. Department of Energy: EERE, Energy Savers, Your Home, Wood and Pellet Heating
• Woodheat.org: All About Wood Stoves