Added information: Federal program ends at the end of 2010
efm Sales Company announces the re-designation of the efm DF520 Coal Stoker Boiler and the AF150 Coal Stoker Furnace to DF520 Multi-fuel Boiler and AF150 Multi-fuel Furnace. The new names for the venerable efm boiler and furnace are a result of testing that will allow current and future owners to burn biomass fuels in their units in addition to coal.
As a result of this change, efm is offering all customers who have purchased a DF520 or AF150 since January 1, 2009, certification that their boiler or furnace is Qualified Property in accordance with Title 26, Section 25 of the United States Code, Internal Revenue Service, and eligible for a $1500.00 tax credit. Owners who take the tax credit on their returns do not have to send the certificate to the IRS, but they should retain it with their tax records.
Specific instructions on how to successfully burn biomass fuels will also be provided with the certificate and to all interested customers. A thermal efficiency of over 75% has been demonstrated in the units with biomass fuels meeting the requirements for the Federal Stimulus related energy program.
No modifications to existing DF520 and AF150 units are required other than to change feed and air settings. Changing from burning biomass to coal and back is simple and easy.
Anyone interested in a demonstration of burning biomass fuel or coal, or to obtain a certificate for a unit purchased since January 1, 2009, please contact the efm Sales Office.
Instructions for Burning biomass Fuel in the efm DF520 Multi-fuel and the AF150 Multi-fuel Furnace:
The biomass fuel that has proved best for use in the efm DF520 and AF150 is a mix of dried corn and wood pellets. A mix of 30% corn and 70% pellets is recommended. The initial feed setting should be 10 teeth of feed and an air setting of 2 or 3. There is very light smoke emitted from the chimney. The fire burns cleaner at an air setting of 3, but is slightly less efficient than a setting of 2. Mixtures of 40% corn/60% pellets also burn well, but require slightly more air and therefore will be slightly less efficient. 50% corn/50% pellets also burn in the stoker.
50% corn/50% coal mixes have been used successfully in the past. There are plans for future testing for mixing other grains with pellets, such as the waste products from a granary operation.