Using these factory-authorized components eliminates the risk of bypass air leaks or moisture damage

Code Compliance: Facilitates the proper installation of vent piping as required by ANSI Z21

The 16U86 is the verified direct replacement for 77W35

In my experience

this orifice is specifically sized for natural gas applications

Lennox Y0392 Lamp Holder 326010-701 Using these factory-authorized components eliminatesThe Lennox Y0392 Lamp Holder is an OEM grade replacement component engineered for high performance Healthy Climate Germicidal UV Light assemblies. As a critical point for electrical continuity and physical support, this UVC replacement lamp holder ensures the precise alignment of 16 inch lamps, such as the Y0390 replacement bulb, within the HVAC airstream. Its robust construction is designed to withstand the continuous UVC exposure common in Lennox