This OEM Lennox part

it utilizes a thermally protected

High-Temp Insulation: Durable jacketing resists thermal stress and cracking in high-cycle furnace environments

preventing the ignition sequence

Utica-Dunkirk 42500934 Rollout Shield R-407A This OEM Lennox partMaintain the operational integrity and safety of your heating system with the genuine Utica Dunkirk 42500934 Rollout Shield. Engineered as a critical combustion barrier, this OEM component is designed to withstand the high temperature environments of gas fired boilers. In the event of a flame rollout conditionoften caused by cracked heat exchangers, sooted passages, or blocked flue ventingthis shield serves as the primary mounting and protective