The Carrier 48GS660002 Aluminum Heat Exchanger is a high-quality replacement component designed to efficiently transfer heat in compatible Carrier furnaces and packaged HVAC heating systems. Constructed from durable aluminum, it works by transferring heat generated during combustion to the circulating air while keeping combustion gases safely isolated from the indoor airflow. This ess... https://www.partshnc.com/aluminum-heat-exchanger-carrier-48gs660002