Selling my 3 year old BioMass 40. This is the combo unit with the attached back up propane burner. This unit new is $7800 plus tax http://www.newhorizoncorp.com/products/wood-boilers/biomass-combo-boiler/ Will sell for $6,000. Must pick up. I am located in Central NY in the Syracuse area. Call 315-877-7222 for more info.