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Recessed installations require standard oval venting or specific recessed venting accessories per the manufacturer’s technical guide
operational parameters
Rugged Build Quality: Constructed with heat-resistant materials and a nickel-plated sensing bulb for long-term durability in high-heat zones
preventing equipment damage and ensuring HVAC system safety
Precision Balancing: Factory-balanced to reduce harmonic noise and prevent premature bearing failure in the furnace blower motor
Lennox 21W66 Gasket 321894-709 Recessed installations require standard ovalThe 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