RBI has introduced the next generation of sealed combustion, direct vent, Futera Series boilers-the Futera III. With full modulation and 3:1 turndown, the Futera III Series supplies the precise amount of heat necessary to maintain desired building temperature by matching heating demand without over-firing and wasting energy. The new Futera III features a variety of quality components, including a rugged, four-pass design, gasketless heat exchanger with bronze headers and fittings that prevent rust and corrosion for the life of the boiler. Finned tubes are industrial-grade copper, with fins and tube walls formed as one for maximum heat transfer. RBI.