The Lennox 71W27 Air Inlet Collar is an HVAC component designed to provide a secure connection for the air intake system in compatible Lennox heating equipment. It directs incoming air into the unit, supporting proper airflow for efficient combustion and system operation. This collar helps maintain a properly fitted air intake connection, reducing the risk of air leakage and installat... https://www.partshnc.com/71w27-lennox-air-inlet-collar