RBI is showing the next generation of its 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, says the company. Features include four-pass design, gasketless heat exchanger with bronze headers, and fittings that prevent rust and corrosion, the manufacturer says.

RBI, a Mestek Company, 260 North Elm Street, Westfield, MA 01085; 413-568-9571; www.rbiwaterheaters.com.