Designed for precise thermal response

Rugged Construction: Built to withstand high-cycle applications in centralized plant steam or chilled water systems

ensuring full coil clearance in high-humidity conditions

it provides a seamless fit-and-forget solution for building automation and residential hydronic controls

Lochinvar & A.O. Smith 100093991 Burner Assembly 321894-708 Designed for precise thermal responseThe Lochinvar & A. O. Smith 100093991 Burner Assembly is a critical OEM component designed for high efficiency commercial boilers and water heaters. Engineered specifically for natural gas water heater repair, this assembly ensures precise fuel to air ratios and stable flame patterns. This NAT FINAL BURNER ASSY is a direct replacement part used across several Lochinvar Knight and A. O. Smith Cyclone models, maintaining the original equipments