Greenwood Technologies Phone Number 800-959-9184Address Line 1 13427 NE 20th StTown / City SeattleCounty / District WAPostcode 98005Category Biomass, EquipmentThe Greenwood Boiler is the next generation of wood boiler at 85% efficient, it burns not only the wood, but the smoke coming from a typical fire. It ties to any heating system and may heat an entire home and provide all your domestic hot water.