How to measure outdoor humidity in HVAC applications

Buildings and Indoor Air Quality
Industrial Measurements


Humidity measurements are used in many control strategies to reduce energy consumption in building automation and control systems. What difference does the selection and installation of outdoor humidity sensors cause in HVAC applications?



Evaporative cooling and economizers are widely used and also required by some standards. However, not all humidity sensors are suitable for this type of measurement. The drift of the sensor, as well as measurement errors caused by a less than ideal installation, can reduce the potential energy savings significantly.

Join us in a free 45-minute Vaisala webinar to learn:

  • Ways to save energy by using evaporative cooling and free cooling
  • Selecting a suitable outdoor humidity sensor
  • Error sources that can reduce or eliminate energy savings​​​

If you have already attended or registered for this webinar, please click here. Otherwise, please watch the recorded webinar by filling the form.


While you’re at it, sign up below to view the previous related webinars:

How to choose the right humidity parameter for humidity control in HVAC systems — watch now

Paradigm shift in building ventilation: Future requirements for Demand Controlled Ventilation and Indoor Air Quality — watch now

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Anu Kätkä


The webinar is hosted by Anu Kätkä, who represents Global Product Management at Vaisala Industrial Measurements. She has extensive experience in building automation and management systems as well as metering and monitoring solutions. 

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