Indoor horizontal CO2 card

Who it’s for

Facility managers, HVAC engineers, and building managers ask “what is the CO2 level in this space right now?” They need a compact, space-efficient card that fits into multi-room overview dashboards without dominating the layout.

What it does

A sensor reporting co2 = 720 ppm displays the reading in a horizontal card whose label and value sit side by side, color-coded by severity: green for Good (0–600 ppm), orange for Moderate (600–800 ppm), and red for High (above 800 ppm).

• Horizontal layout fits more rooms per row on a multi-zone indoor environment dashboard
• Live CO2 reading in ppm with automatic color coding across three severity bands
• 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 band colors — edit the color of each range in Icon color ranges and Value color ranges.
• To rename the units label — change the Units field in the widget settings if needed.

Tips

• Use the horizontal layout to fit more rooms per row when building a whole-floor or whole-building CO2 overview; pair with the standard card for rooms that frequently hit the High band and warrant closer attention.
• Placing horizontal cards for CO2, temperature, and humidity side by side on the same row lets facility staff quickly identify rooms with combined comfort issues that need HVAC attention.
• For demand-controlled ventilation, a row of horizontal CO2 cards lets operators see at a glance which zones are occupied and driving up CO2 so they can manually boost supply air if the automation is slow to respond.