Lennox 21W66 Gasket 321894-709 determined by looking at the

determined by looking at the discharge side of the air

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

replacing damaged or aged covers without modification

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

preventing equipment damage and ensuring HVAC system safety

Lennox 21W66 Gasket 321894-709 determined by looking at theThe 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