ASTM E 2618

1.1 This test method applies to wood-fired or automatically fed biomass burning hydronic heating appliances, which the manufacturer specifies for outdoor installation or in structures not normally occupied by humans. These appliances transfer heat to the indoor environment through circulation of a liquid heat exchange media such as water or a water-antifreeze mixture. 1.2 The test method simulates hand loading of seasoned cordwood or fueling with a specified biomass fuel and measures particulate emissions and delivered heating efficiency at specified heat output rates based on the appliances rated heating capacity. 1.3 Particulate emissions are measured by the dilution tunnel method as specified in Test Method E 2515. Delivered efficiency is measured by determining the heat output through measurement of the flow rate and temperature change of water circulated through a heat exchanger external to the appliance and determining the input from the mass of dry fuel and its higher heating value. Delivered efficiency does not attempt to account for pipeline loss. 1.4 Products covered by this test method include both pressurized and non-pressurized heating appliances intended to be fired with wood or automatically fed biomass fuels. These products are hydronic heating appliances which the manufacturer specifies for outdoor installation or in structures not normally occupied by humans. They are often connected to an indoor heat exchanger by insulated pipes buried in the ground and normally include a pump to circulate heated liquid. They are used to heat structures such as homes, barns, and greenhouses and can heat domestic hot water, spas, or swimming pools. 1.5 Distinguishing features of products covered by this standard include: 1.5.1 Manufacturers specify outdoor installation or installation in structures not normally occupied by humans. 1.5.2 A firebox with an access door for hand loading of fuel or a hopper and automate ....(abbreviated)