Dunham-Bush

this component ensures a direct physical and electrical drop-in fit

Whether you are performing a repair or a system upgrade

this kit utilizes Buna-N elastomers

Universal Compatibility: Validated for use with R22 and R410A refrigerants in systems ranging from 1 to 6

Siemens Building Technology QFA3212.EWSN Sensor 328140-751 Dunham-BushThe Siemens QFA3212. EWSN is a high precision room humidity and temperature sensor designed for demanding commercial HVAC and building automation systems. Built for seamless integration with Siemens Terminal Equipment Controllers (TECs) and APOGEE systems, this unit provides critical environmental feedback to ensure optimal indoor air quality. It serves as a direct professional upgrade and replacement for the QFA3212. EWNN, maintaining the same