Carrier 920121 BCE Enhanced VVT Thermostat Duct Airflow Bypass Controller is a thermostat-controlled duct airflow bypass module used in Carrier HVAC systems. Identified by model 920121 BCE and featuring Enhanced VVT, it regulates bypass airflow in the ductwork in response to thermostat commands. It is designed to be installed within the duct system to support Carrier equipment in managing airflow distribution.
