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Abstract
A test method for determining carbon monoxide (CO) and paniculate matter (PM) emissions from masonry heaters is described and results of tests on two masonry heaters are presented. The method specifies fueling protocol and laboratory measurement procedures for determination of both emission factors (g/kg) and rates (g/hr). The fuel load size and fueling intervals are dependent upon the firebox volume of the masonry heater.
The test method starts with a room temperature masonry heater and involves five firings to achieve burn rates in two ranges, where the burn rate is defined as the dry mass of the fuel load divided by the time between loadings. Emission samples are extracted from a dilution tunnel with a set flow rate and configuration. Particulate matter sampling is similar to U.S. EPA Method 5G for woodstoves, and CO concentration is measured by a nondispersive infrared (NDIR) gas analyzer. The emissions results for each firing are weighted according to EPA Method 28 to obtain the overall emission totals for the test.