EG-40, 76,000 Output Cast Iron Steam Boiler, Spark Ignition - Series 6 (NG PIDN)), No Tankless Opening

Weil‑McLain EG‑40 – 125 MBH Cast‑Iron Steam/Water Boiler, 84 % AFUE The EG‑40 is a versatile, cast-iron boiler engineered for either steampipe or hydronic applications. With a 125 MBH input and net outputs of approximately 106 MBH (water) or 78 MBH (steam), it delivers 84 % AFUE. It arrives in a factory-assembled block with insulated jacket and horizontal-to-vertical draft hood, ready for chimney venting weil-mclain.com +14 weil-mclain.com +14 afsupply.com +14 . ???? Contractor-Critical Features Factory-Assembled Cast-Iron Sections Boiler rated for 50 PSIG working pressure; includes built-in air separator and extended steel jacket for heat retention weil-mclain.com weil-mclain.com +1 igate.northernplumbing.com +1 . Auto Vent Damper & Ignition System Intermittent electronic ignition with stainless burners and automatic damper enhance efficiency and eliminate heat loss during idle ussupply.com +10 weil-mclain.com +10 oswaldsupply.com +10 . Steam & Water Versatility Configurable for steam (with relief valve, LWCO, pressure gauge, siphon) or hydronic use (with combination gauge, air eliminator) thegranitegroup.com +4 oswaldsupply.com +4 oswaldsupply.com +4 afsupply.com +2 afsupply.com +2 weil-mclain.com +2 . Service Accessibility Front-access panels, plug-in wiring harness, and rollout fuse simplify maintenance; chimney connection remains compact ussupply.com +2 weil-mclain.com +2 weil-mclain.com +2 . Tankless Coil Compatibility Optional left-side coil opening allows integration of on-demand domestic hot water without external tanks afsupply.com . ???? Specification Table Parameter EG‑40 Input 125 MBH DOE Output (Steam) ~78 MBH DOE Output (Water) ~106 MBH AFUE 84 % Pressure Rating 50 PSIG Vent Connection 6″ chimney via draft hood Ignition System Intermittent electronic Weight ~505 lb Warranty (Water/Steam) Heat exchanger: 20 yr / 10 yr; parts: 2 yr ???? Installation & Service Insights Vent Sizing & Draft: Requires a minimum 20‑ft chimney with a 6″ flue. Auto damper reduces standby heat loss supplyhouse.com +8 weil-mclain.com +8 afsupply.com +8 oswaldsupply.com unitedsupplyusa.com +1 weil-mclain.com +1 weil-mclain.com +1 thegranitegroup.com +1 . Steam Use: Includes pressure gauge, relief valve, LWCO, siphon, and cocks — ready for one-pipe steam or gravity return systems supplyhouse.com +4 afsupply.com +4 weil-mclain.com +4 . Hydronic Use: Equipped with air eliminator, combination gauge & relief valve — applicable for hot water systems including radiant layouts. ???? Contractor Summary The EG‑40 is a durable, serviceable boiler engineered for reliability in both steam and water applications. Its high-efficiency gas ignitor and auto damper reduce operating costs, while its universal design offers flexibility across project types. Front-access panels and modular wiring reduce service time, making it a solid option for contract installations in multi-family or light commercial settings.