The report gives results of a 2-year study in Vermont and New York, monitoring woodstove performance. The objective of the study was to determine the effectiveness of catalytic and non-catalytic low-emission woodstove technology in reducing wood use, creosote accumulation, and particulate emissions. Averaged results indicate that the low-emission non-catalytic stoves and catalytic stoves had lower creosote accumulation, wood use, and particulate emissions than conventional technology stoves, although the range of values was quite large. The reductions in particulate emissions by the catalytic and low-emission stoves were not as great as could be expected based on laboratory tests.