Dominator Series domestic hot water heaters and hydronic heating boilers use a sealed combustion chamber, special alloy burners, multispeed blowers, and a staging control. They are capable of firing up to four stages; the staging control matches the fuel input to the system load for the highest efficiency. Features include stainless steel burners, bronze headers, low-voltage controls, an LED diagnostic panel, Category I venting, multiple venting options, small footprint, 84% efficiency, low NOx (less than 30 ppm) and fewer blowers and gas valves to achieve staged firing.

RBI, a Mestek Co., 260 N. Elm St., Westfield, MA 01085; 413-568-9571 (905-670-5782 in Canada); www.rbiwaterheaters.com (website).

eProduct #187