The Superior Radiant CE021 Air Pressure Switch is a safety control component designed to monitor air pressure within compatible HVAC heating equipment. It operates by sensing changes in pressure and switching electrical contacts when the preset pressure level is reached, helping verify proper airflow and combustion operation. This switch is commonly used in radiant heating systems, fu... https://www.partshnc.com/ce021-superior-radiant-air-switch-55-wc-wbrkt