Pellet Stoves vs. Wood Stoves: Which is Greener?
Image credit: ritingon @ Flickr
Pellet stoves vs. wood stoves: By the numbers
40 to 60: Grams of smoke per hour emitted by older, uncertified stoves.
2 to 5: Grams of smoke per hour emitted by newer, EPA-certified stoves.
Less than 1: Grams of smoke per hour emitted by pellet stoves.
Carbon dioxide emissions
0.035: Pounds of CO2 emitted per kilowatt-hour generated by burning pellets.
0.00612: Pounds of CO2 emitted per kilowatt-hour generated by burning wood.
6 - 7: Average miles per gallon (pdf) in a diesel tractor-trailer truck.
22: Pounds of CO2 emitted per gallon of diesel burned.
20: Average payload (pdf), in tons, for heavy truck shipping in the U.S.
1.11: Pounds of CO2 emitted per ton of shipping weight per gallon of diesel.
Energy and heating values
13.6: Million BTUs per ton (pdf) of pellets.
15.3: Million BTUs per cord (pdf) of wood.
11.3: Million BTUs of heating value per ton of pellets, at 83 percent efficiency.
10.7: Million BTUs of heating value per cord of wood, at 70 percent efficiency.
1.5: Cords of wood equivalent to one ton of wood pellets.
147000: BTUs per gallon of diesel fuel.
6.8: Gallons of diesel fuel per 1 million BTU.
92.48: Gallons of diesel fuel per 13.6 million BTU.
Miscellaneous fun numbers
4.5: Feet above the forest floor, on the uphill side of the tree, where diameter at breast height is measured.
6.5: Million cubic yards of waste diverted from landfills and converted to home heating in the form of pellets in 1993-94.