Modern wood-burning stoves certified by the U.S. Environmental Protection Agency are 50 percent more energy efficient than those manufactured before 1990 and consume one-third less wood for the same generated heat. Modern wood burning stoves release 70 percent less particle pollution, both inside the home and outside.
A wood-burning stove is only certified by the EPA if it meets the particulate emissions limit of 4.1 grams per hour for catalytic wood heaters and 7.5 grams per hour for non-catalytic wood heaters. The stove with the lowest emission rate is 0.87 grams per hour, which is the Optima PS1, manufactured by Archgard Industries, Ltd. It has a heat output between 10,196 and 29,581 Btu per hour.
Burning dry firewood increases the efficiency of a wood stove. Check annually for any cracks in the chimney inside and outside as dangerous smoke can leak into the home.