Lennox 21W66 Gasket 321894-709 Rugged Build Quality: Constructed with

Rugged Build Quality: Constructed with heat-resistant materials and a nickel-plated sensing bulb for long-term durability in high-heat zones

Precision Balancing: Factory-balanced to reduce harmonic noise and prevent premature bearing failure in the furnace blower motor

preventing equipment damage and ensuring HVAC system safety

When an external safety limit (ECO) opens

Recessed installations require standard oval venting or specific recessed venting accessories per the manufacturer’s technical guide

Lennox 21W66 Gasket 321894-709 Rugged Build Quality: Constructed withThe Lennox 21W66 Gasket is a critical OEM replacement component engineered specifically for induced draft assembly sealing in high efficiency residential and commercial heating units. As a veteran tech knows, a compromised seal at the inducer motor lead to pressure switch trips and flue gas leakage. This draft inducer blower gasket (cross referenced as LB 106197) is designed to withstand high temperature combustion environments while maintaining a