Lochinvar & A.O. Smith 100112667 Burner Assembly 321702-401 System Protection: Prevents backdrafting and

System Protection: Prevents backdrafting and negative pressure environments that can damage gas-fired appliances

Smith family of brands

making it a versatile HVAC electrical component for a wide range of air handling and process cooling units

Stem Extension

The vacuum-actuated diaphragm is calibrated for high-cycle reliability in demanding environments

Lochinvar & A.O. Smith 100112667 Burner Assembly 321702-401 System Protection: Prevents backdrafting andThe Lochinvar 100112667 is a critical component for maintaining combustion efficiency in high output commercial water heating systems. This 18 inch NAT 18 inch burner assembly is precision engineered with a #30 orifice burner to ensure optimal flow rates and flame stability within the combustion chamber. As a direct A. O. Smith burner assembly replacement, it addresses common performance drops caused by port occlusion or thermal fatigue on older