Richard DeWolf’s Portland-based company, Versatile Wood Products, specializes in the restoration and remodel of historical doors, windows and cabinetry. In the course of a single year, that work produces a significant amount of wood waste and sawdust, to the tune of about 100 total tons per year. DeWolf wanted to find a sustainable way to get rid of those excess materials. So he teamed up with another Portland firm, Wisewood Energy, to design and install a biomass boiler system that takes what would have been dumped in a landfill and turns it into fuel to heat Versatile Wood Products’ 40,000-square-foot facility in North Portland. …The system is expected to conserve 11,600 therms of natural gas and 8,600 kilowatt-hours of electricity annually.