AERCO’s AM series of boilers and water heaters features high-efficiency, condensing hydronic technology. The series has efficiencies up to 98% to reduce energy consumption and help achieve lower cost of ownership. Offering turndown of up to 20:1, the series minimizes cycling and allows the units to exactly match loads to eliminate over-firing. Each independent module has its own gas valve, blower, burner and combustion controls and safeties. All units feature premixed burners designed with a fiber mesh for high-efficiency combustion and low-pollutant levels of 15 ppm NOx and 15 ppm CO.