always verify that your fan’s operational speed does not exceed the maximum rim speed of 6

Whether you are addressing a failing diaphragm or upgrading an older pneumatic assembly

whereas the older version was strictly for R22 using mineral oil

Built with a rugged carbon steel housing

Direct OEM Match: Built to the exact specifications of part number 43G3801

Siemens Building Technology QAA2235.EWSN Sensor mario always verify that your fan’sThe Siemens QAA2235. EWSN is a precision room temperature sensor engineered for seamless integration into commercial Building Automation Systems (BAS). Utilizing a 100k Ohm thermistor active output, this unit provides highly stable and linear temperature feedback to HVAC controllers, ensuring tight deadband management and optimized energy efficiency. Designed specifically for indoor comfort monitoring, it operates across a standard range of 32F to