Lennox 71M80 Concentric Kit 326058-756 the A2123404 offers precise compatibility

the A2123404 offers precise compatibility with hot water boiler systems where fluid velocity is critical for heat transfer performance

this OEM component features a 17-second warmup period

Replacement motors should not be selected by horsepower and voltage alone

but serial number verification is recommended for 100% accuracy

Using this on a 2-element unit may lead to improper staging and safety faults

Lennox 71M80 Concentric Kit 326058-756 the A2123404 offers precise compatibilityThe Lennox 71M80 Concentric Kit is a professional grade 1 1 2" Concentric Vent Kit designed to streamline high efficiency furnace venting by combining intake and exhaust into a single roof or sidewall penetration. Engineered specifically for compatibility with Lennox HVAC systems, including elite models like the SLP99 and EL297 series, this OEM concentric termination kit utilizes a dual pipe design to isolate flue gases from fresh combustion air.