the S1-026-36561-000 is the manufacturer-designated upgrade and direct replacement for the obsolete 87H64 part number

Different colors represent specific vacuum or pressure ratings

This receptacle is engineered to work with standard plug-in relays such as the R4222

This 24-277V thermostat features advanced self-configuring circuitry

Complete Control Package: Includes both the supply and master A99 thermal sensors

Lennox 84K82 Flue Cover 321894-708 the S1-026-36561-000 is the manufacturer-designatedThe Lennox 84K82 Flue Cover is a critical OEM replacement part designed to maintain the structural integrity and safety of the combustion assembly in specific Lennox gas furnace and package unit models. Constructed from heavy duty metal to withstand the high temperature environment of the flue box, this flue box cover (part number 84K82 or RS41358 008) ensures that combustion byproduct gases are properly contained and directed through the exhaust