Lennox 21W66 Gasket 323269-701 While the 24-inch diameter is

While the 24-inch diameter is common

Whether you are troubleshooting a packaged rooftop unit or a complex ventilation system

Look for water stains or scale buildup around the inducer housing or on the bottom of the furnace cabinet

The "B" indicates the basic model

Lennox 21W66 Gasket 323269-701 While the 24-inch diameter isThe 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