The unit operates in full condensing mode at all times, while a state-of-the-art temperature mixing system protects the boiler’s primary heat exchanger. The condensing secondary heat exchanger is constructed from solid stainless steel and is designed to operate at the boiler’s full flow rate. The low-mass, gasketless primary heat exchanger has solid cast iron headers and finned copper (or optional cupronickel) tubing for superior heat transfer, resistance to scaling and protection against thermal shock. The Fusion’s heat exchanger was designed using the most efficient and dependable heat transfer materials available today. The full modulation firing system continuously varies the energy input to precisely match heating load without overfiring or wasting fuel. Unlike most condensing products available today which publish the highest efficiencies at the lowest inputs, the Fusion is capable of attaining efficiencies as high as 99% at Full Input! Always select a heater equal to or larger than the requirement.For 2☏ (-17☌) rise per hour: Increase BTUH input by 100%.For 1½☏ (-17☌) rise per hour: Increase BTUH input by 50%.RBI’s commercial pool heaters are built to outlast the competition – year after year. Available in on/off, 2-stage, 4-stage and full-modulation with reduced footprints, all RBI near-condensing boilers are constructed for simple boiler installation and maintenance.

RBI Near-Condensingĭelivering efficiencies up to 88%, RBI’s selection of near-condensing copper finned boiler models are built for strength and reliability, tackling the toughest challenges of the commercial boiler market. But RBI’s series of condensing, gas-fired boilers ensures that efficiency this high is now within reach. With efficiency levels reaching 99%, it’s easy to assume that you are simply dreaming.

Greater installation flexibility is provided by left or right gas connections and left and right water connections.

RBI’s commercial water heaters are the only units on the market that come standard with bronze headers across the entire product line. RBI All Products Brochure Reliable Construction RBI boiler models are available to fit any commercial application, from atmospheric to fan-assisted sealed combustion in a wide 100,000 to 4,000,000 BTU capacity range. RBI provides the most complete line of finned copper tube boilers and water heaters available today.

Rbi boiler serial number nomenclature