The report gives results of the operation of two wood stoves in the laboratory with simultaneous on-line chemical analysis of the gases entering the secondary combustion zone and those leaving the stove. (NOTE: Self-initiating secondary combustion in wood stoves is encouraged by designs that introduce additional heated air and turbulence to the primary combustion products. This can be very effective in reducing CO and hydrocarbon emissions at high burning rates. At low burning rates, the effectiveness is limited by low temperatures, inadequate mixing, and thermal quenching by the primary air which bypasses the wood.) Stove modifications providing increased temperatures and improved mixing in the secondary combustion zone in a small box stove resulted in minor improvements in secondary burning. The continued burning of CO in the secondary zone was not greatly affected. In a large side-draft stove, with effective secondary burning at high burning rates, the secondary burning at low rates was not effective at any air flow distribution available to the operator.

Caption title. "May 1984." "EPA-600/7-84-061." Microform.