Lennox 43L21 Turbulatory Assembly R-134A Internal Safety Interlock: Prevents the

Internal Safety Interlock: Prevents the burner from firing until the damper plate is in the fully open position

the 664063R is vital for contractors performing refrigerant metering device replacement to restore factory-standard cooling efficiency

High Water Capacity: Superior moisture adsorption prevents ice formation at the expansion valve

Versatile Application: Configurable for supply/exhaust

Lennox 43L21 Turbulatory Assembly R-134A Internal Safety Interlock: Prevents theThe Lennox 43L21 Turbulator Assembly is a critical OEM replacement part designed to optimize thermal performance within the heat exchanger of Lennox gas furnaces and unit heaters. Engineered from heat resistant Pyrolite, this 8 inch by 1. 8 inch technical component is strategically placed within the heat exchanger tubes to disrupt laminar flow. By inducing a consistent swirling pattern in the flue gases, the turbulator assembly effectively eliminates