There are three basic types of wood stoves that have received certifications under the wood heater program:
- Catalytic wood stoves are equipped with a ceramic or metal honeycomb device, called a combustor or catalyst. The catalyst is coated with a a noble metal such as platinum or palladium that reduces the ignition temperature of the unburned volatile organic compounds, P\particulate matter and carbon monoxide in the exhaust gases prior to their exit into the atmosphere thereby reducing particulate matter emissions. As the components of these gases burn, the temperature inside the catalyst increases to the point at which the ignition of the gases is essentially self sustaining. Wood stoves equipped with catalytic combustors are assigned a default efficiency rating of 72%.
- Pellet stoves are those wood heating appliances fueled by pellets of sawdust, wood products and other biomass materials pressed into manageable shapes and sizes. These stoves have active air flow systems and unique grate design to accommodate this type of fuel. Some pellet stove models are subject to the wood stove regulations, while others are exempt due to a high air to fuel ratio. Pellet stoves are assigned a default efficiency rate of 78%.
- Non catalytic wood stoves are those wood stoves that do not use catalysts but do have emission-reducing technology. Typical emissions-reducing design characteristics for an EPA certified non-catalytic wood stove include baffles and secondary air chambers. Non- catalytic wood stoves are assigned a default efficiency rate of 63%.
What types of EPA-certified wood stoves are available for sale?
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