The Rheem-Ruud SPIDERfire® line of condensing-type commercial water heaters offers a wide range of Btu inputs, all with thermal efficiencies from 92-95 percent, resulting in a higher recovery rate, particularly during periods of heavy usage. According to the manufacturer, the heart of the unit is its innovative, patented heat-exchange system: a series of connected, elongated tubes immersed in the water tank and through which heat is transferred to the water by gases from the combustion process. The most powerful unit in the series, with an input of 350,000 Btuh, can deliver 460 gallons of water per hour at a 100°F rise. Lower-input models ranging from 130,000-300,000 Btuh are also available. All six units come equipped with a 100-gallon storage tank and can operate on either natural gas or LP. They can be installed as a two-pipe, power direct-vented unit (for environments where negative air pressure or IAQ is a concern) or single-pipe, power-vented product. The Advanced System Sentinel™ Diagnostic System enables installers and service technicians to monitor key functions and components.

Rheem Water Heating Div., 101 Bell Rd., Montgomery, AL 36117; 334-260-1500;

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