Federal Tax Credits for Energy Efficiency
Tax credits are available at 30% of the cost, up to $1,500, in 2009 & 2010 (for existing homes only)
There is a federal tax credit for biomass fuel stoves (used for heat or water heating) " placed in service" in 2009 and 2010 for 30% of the cost (including installation) up to $1,500. The stoves must have a thermal efficiency rating of at least 75% as measured using a lower heating value.
The law defines "biomass fuel" as any plant-derived fuel available on a renewable or recurring basis, including agricultural crops and trees, wood and wood waste and residues (including wood pellets), plant (including aquatic plants), grasses, residues, and fibers.
More information available at Energy Star's website