While it provides excellent mechanical retention and basic debris protection

Precision Control: Acts as the central master control unit

How many dampers can be connected to each zone

and R fuses

This prevents dangerous exhaust leaks and saves significant labor time during the swap

Siemens Building Technology QFM2171 THPU32HP7Y While it provides excellent mechanicalThe Siemens Building Technology QFM2171 is a high performance duct relative humidity and temperature sensor designed for integration into commercial HVAC systems. This Q Series duct sensor utilizes a 4 20mA output signal for both RH and temperature, providing stable and precise data transmission even over long wire runs. Engineered for 5% accuracy, the QFM2171 is ideal for BAS (Building Automation Systems) that require reliable monitoring of supply,