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supporting overall chiller efficiency and operational stability
installation involves handling pressurized refrigerant and requires a recovery machine
Built with a durable brass body and high-quality NBR seals (Buna-N)
it is not intended for steam applications
Siemens Building Technology QFM81.21 Hygrostat 323055-751 supporting overall chiller efficiency andThe Siemens Building Technology QFM81. 21 is a commercial grade duct hygrostat designed for precision relative humidity control in HVAC systems. Engineered for both monitoring and regulation, this device features a stabilized sensing strip that ensures superior linearity and long term stability, even in high humidity environments or air contaminated with dust. Unlike baseline models, the QFM81. 21 utilizes an internal setpoint adjuster to prevent
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