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the 421-664 provides a direct-fit solution that maintains the OEM performance standards of Webster burner ignition systems
Increased Headroom: The 50VA rating provides superior capacity over standard 40VA transformers
a failing exhaust motor often triggers pressure switch lockouts or furnace inducer motor noise
simplifying field swaps and reducing downtime
Lochinvar & A.O. Smith 100111591 Burner 340155-7026 the 421-664 provides a direct-fitThe Lochinvar & A. O. Smith 100111591 is a high performance 14 inch burner assembly specifically engineered for commercial and residential natural gas (NG) water heaters and boilers. This OEM water heater burner features a factory calibrated #39 orifice to ensure precise gas to air mixing, facilitating optimal combustion efficiency and reducing pollutant output. Built to the rigorous standards of Lochinvar and A. O. Smith, this final burner assembly
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