Sequoyah E3400 EPA Phase 1 Approved Wood Gasification Down Draft Outdoor Furnace. Heats up to 320,000 BTUs or 10,000 sq. feet. Holds 250 gals of water. Over 400 ft of insulated Flexsul-Seal (exhaust travel) included. Everything you need is included in the sale, circulating pumps, heat exchanger, etc. Bought in 08. Still lots of life left. Call Lew with any questions or to set up a time to see it.