Indoor CO2 card with background

Who it’s for

Facility managers, HVAC engineers, and building managers ask “can I see the CO2 status for every monitored room at a glance, without reading individual numbers?” The background-color variant is designed for building management dashboards where a single colored card must communicate ventilation adequacy from across a control room.

What it does

A sensor reporting co2 = 720 ppm displays the reading on a card whose entire background fills with the severity color: green for Good (0–600 ppm), orange for Moderate (600–800 ppm), and red for High (above 800 ppm).

• Full-card background color makes CO2 status readable across a room without reading the number
• Live CO2 reading in ppm
• Shows one sensor’s reading per widget; tile multiple widgets to monitor all rooms at a glance

How to set up

Data keys

Key	Role	Type	Description
co2	Main value	Timeseries	CO2 concentration in ppm; change the key name to match your device’s telemetry key

The widget ships with a simulated function datasource key labeled CO2 level, 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 (ppm)	Level	Color
0–600	Good	Green
600–800	Moderate	Orange
800+	High	Red

How to customize

• To change the severity 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 background colors — edit the background color for each severity level in the widget settings.
• To rename the units label — change the Units field in the widget settings if needed.

Tips

• On a facilities management display with one card per meeting room, the background color lets the duty manager spot an over-occupied space instantly without scanning individual readings.
• Use consistent severity colors across all indoor air quality widgets: green is safe, red needs attention.
• For demand-controlled ventilation systems, pair this card with HVAC status widgets so operators can confirm that a red CO2 card triggers a corresponding increase in supply air volume.