Lennox 12W78 Drain Pan 318172-701 consistent operation in residential and

consistent operation in residential and light commercial environments

it maintains critical airflow performance and static pressure integrity within residential and light commercial air handlers and furnaces

The assembly features durable construction to handle the thermal cycles of a high-efficiency condensing furnace

Does this model require an external equalizer line

Lennox 12W78 Drain Pan 318172-701 consistent operation in residential andThe Lennox 12W78 is a heavy duty vertical drain pan engineered for superior condensate management in high efficiency upflow configurations. This genuine OEM replacement part is specifically designed to fit 12 inch and 15 inch diameter Lennox commercial air handlers and select residential condensing units. Built from non corrosive, high impact materials, the 12W78 prevents moisture accumulation that can lead to structural damage or secondary heat