Gas Boiler EVG 155 High Efficiency Condensing 155 MBH 5 to 1 Modulating Stainless Steel Heat Exchanger WM-383900006

The Gas Boiler EVG 155 High Efficiency Condensing 155 MBH 5 to 1 Modulating Stainless Steel Heat Exchanger (WM-383900006) provides a 155,000 BTU input, approximately 144,000 BTU output, and a 95 percent AFUE, delivering reliable energy-efficient performance for residential and light commercial hydronic applications. Its stainless steel fire-tube heat exchanger supports true condensing operation at low return-water temperatures, while the 5 to 1 turndown modulation maintains smooth, balanced heating with reduced cycling. The boiler operates on 120 volt single-phase power and includes integrated temperature and pressure sensors, ignition control, onboard diagnostics and compatibility with multi-boiler sequencing. Venting is supported through 3 inch PVC, CPVC or polypropylene in direct-vent or non-direct-vent configurations depending on allowable vent length. System connections include 1 inch supply and return tappings, a 1/2 inch gas inlet, and a properly sized condensate drain for high-efficiency operation. Technicians benefit from the compact cabinet design, service-friendly component layout, primary-secondary piping compatibility and durable stainless steel exchanger construction that ensures long-term reliability in modern hydronic heating systems.