Siemens Building Technology QAA22SS.EWNN Sensor 321894-709 As a direct replacement for

As a direct replacement for the legacy WTR20003K part number

replacing degraded fiberboard insulation with this genuine boiler door gasket equivalent restores the unit to its factory thermal profile

This versatile permanent split capacitor motor operates on a standard 115V single-phase electrical supply

ensuring a seamless mechanical fit and consistent electrical ratings

Siemens Building Technology QAA22SS.EWNN Sensor 321894-709 As a direct replacement forFor building automation contractors requiring a tamper proof and flexible environmental monitoring solution, the Siemens QAA22SS. EWNN stands as a professional grade room temperature sensor designed for seamless integration. This "Sensing Only" variant features a blank front with no logo, making it the ideal choice for schools, high traffic commercial spaces, or public corridors where preventing unauthorized setpoint adjustments is mission critical.