January 15, 2026

Data-Driven HVAC O&M Using Temperature and Humidity Loggers

Temperature and relative humidity (Temp/RH) loggers give facilities managers a clear view of how HVAC systems actually perform over time. Instead of relying on spot checks or occupant complaints, these small, non-invasive devices continuously track indoor conditions, revealing trends that point to comfort issues, scheduling problems, or hidden inefficiencies.
Categories: Heating Season, HVAC
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Heating, Ventilation, and Air Conditioning (HVAC) systems are typically evaluated based on spot checks or when a occupant complaints, which only gives you an instance of the overall performance. Temperature and relative humidity loggers provide a simple way to understand how HVAC systems are actually operating over time. An operator can continuously capture conditions of the mixed air, supply air, return air and outside air temperatures by placing a data logger at these precise locations. Check out our noBAS Building Re-tuning Guide which contains content on Outside Air Control using Outside Air Fraction.

What is a Temp/RH Logger?

A Temperature/Relative humidity logger is a logger which measures air temperature and moisture levels over time in one single device.

This logger helps operators:

  • Wirelessly communicate via Bluetooth to logger
  • Confirm occupants temperature complaints
  • Scheduling problems
  • Reveal temperature swings

Why Facilities Managers should use a Temp/RH logger:

  • Maintain comfort level for all occupants
  • Detect poor humidity control or dehumidification
  • Pinpoint if units are running outside scheduled hours.
  • Fine-tune your HVAC unit to be efficient and reliable

You can check out our equipment library to find a Temp/RH Logger suitable for your application by using the various filters and search functionality.