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AERCO International: Condensing Boiler

September 10, 2007
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The Benchmark 3.0 low-NOx (BMK 3.0LN) condensing boiler now supports dual-fuel (natural gas or propane) applications, increasing system design options for facility owners and managers. With a 15:1 turndown over an operating range of 200,000 to 3 million Btuh, the boiler matches fluctuating loads to minimize boiler cycling and eliminate temperature overshoot. The boiler achieves very high thermal efficiencies when it’s firing at its lowest rates, so the BMK 3.0LN is most efficient during part-load operations, which characterize most of the heating season, said the company. The boiler achieves 99.4 percent efficiency at its lowest firing rate, and is more efficient at 100 percent input than other boilers with similar capacity, according to the manufacturer. The unit is designed with a low-NOx burner and will consistently measure less than 30 parts per million of NOx corrected to 3 percent excess oxygen at all firing rates. In addition to having a constant set point, indoor/outdoor reset schedule or 4-20 mA signal, one or more boilers can be integrated via a Modbus communications protocol to the manufacturer’s multiple boiler management system (BMS) or facility-wide energy management or building automation system.

AERCO International, 159 Paris Ave., Northvale, NJ 07647; 800-526-0288 or 201-768-2400; 201-768-7789 (fax); info@aerco.com; www.aerco.com

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