Indoor humidity card

Who it’s for

Facility managers, HVAC engineers, and building managers ask “is the humidity in this space within the comfortable range for occupants right now?” They monitor relative humidity to protect both occupant health and building fabric from the effects of air that is too dry or too damp.

What it does

A sensor reporting humidity = 45% displays the reading on a color-coded card: orange for Low (0–30%), green for Comfortable (30–60%), and red for High (above 60%).

• Live humidity reading in % with automatic color coding across three comfort bands
• Comfort bands reflect the range associated with occupant comfort and reduced risk of mold or static electricity
• Shows one sensor’s reading per widget; add multiple widgets to monitor different rooms or zones

How to set up

Data keys

Key	Role	Type	Description
humidity	Main value	Timeseries	Relative humidity in %; change the key name to match your device’s telemetry key

The widget ships with a simulated function datasource key labeled Humidity, so it draws random values until you point the datasource at a device and rename the key.

To point it at your own device: open the dashboard in edit mode, open the widget’s Datasources, pick the entity or entity alias, and replace the function key with the key your device reports.

Value ranges

Range (%)	Level	Color
0–30	Low	Orange
30–60	Comfortable	Green
60+	High	Red

How to customize

• To change the comfort thresholds — edit Icon color ranges and Value color ranges; set the same boundaries in both so the icon and the number always agree.
• To change the band colors — edit the color for each comfort level in the widget settings.
• To rename the units label — change the Units field in the widget settings if needed.

Tips

• Humidity below 30% causes dry-eye complaints, increased susceptibility to respiratory infections, and static discharge that can damage sensitive electronics; a persistent Low reading in winter indicates the humidification system needs attention.
• Humidity above 60% promotes mold growth and dust mite proliferation, both of which are common allergen triggers; a sustained High reading in a corner office with poor air circulation warrants an inspection for condensation.
• For HVAC commissioning, compare humidity readings across multiple floors on the same dashboard to identify zones where the humidification or dehumidification capacity is unbalanced.