Network Thermostat X7-WIFI

CO2 sensors are used to control ventilation systems and monitor indoor air quality. They can be stand-alone sensors or integrated into thermostats or air quality monitoring platforms.

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Technology Basics Application Guidance Energy & Cost Impacts

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Network Thermostat X7-WIFI

Thermostat with integrated CO2 sensor for long term monitoring and demand control ventilation.

Hub Highlights:

CO2 value displayed on device. Graph of CO2 values over time available on cloud-based interface.
Connects to Network Thermostat building automation system.
Excellent performance on Hub CO2 accuracy testing protocols
Includes CO2, temperature, and humidity sensors. Uses automatic background calibration.

Last Edited on: 9/8/2025

Sensor Type	Photoacoustic Manufacturer: Sensirion
Power Input	20-30 VAC, 24 VDC
Outputs	Wifi to cloud-based interface
Altitude Correction Method	Unknown
Measurement Range	400-2,000 ppm
Reported Accuracy	± 40 ppm
CO2 Display	On device and web (account required)
Uses Automatic Background Calibration (ABC)	Yes

Date of Test (including warm-up period if device uses automatic background calibration)	August 11-28, 2025
Sample Size	4
Error of CO2 measurement @1100 ppm (average) (ppm)	14
Error of CO2 measurement @ 1100 ppm (standard deviation) (ppm)	12
Accuracy Category	less than ±75ppm
Noise of CO2 measurement @1100 ppm (Average) (ppm)	3
CO2 Full results	See Box Plot
Operating Power for Sensor (watts)	0.88
Operating Power for Gateway (watts)	NA
Operating Power for Sensor + Gateway (watts)	0.88
Operating Power Category	less than ±1 W
Maximum Number of Sensors per Gateway	NA

Data Collection

Sample Size

Data Source: Staff at the UC Davis Western Cooling Efficiency Center

User interface

1. Can the sensor display the CO2 level to occupants? If yes describe.

Yes - Sensor screen displays live CO2 readings. Up to 90 days of historical CO2 data can be displayed graphically on Network Thermostat CloudConnect website, account required.

User interface

2. Can the sensor display a visual indicator to occupants that the CO2 level has exceeded a programmed threshold? If yes, describe (what does the indicator look like, what the default thresholds are, and can the threshold be changed).

Yes - Screen displays a flashing exclamation point icon when CO2 exceeds the high threshold (1100 ppm by default). The threshold is configurable on device and on CloudConnect webpage.

Reporting capabilities

3. Can the sensor alert facilities (such as an email, text, or call phone application) when the CO2 level has exceeded a programmed threshold? If yes, describe (what does the indicator look like and can the threshold be changed).

Yes - Email and text alerts can be configured on CloudConnect webpage. Alert threshold can be changed.

Integration capabilities

4. Can the CO2 sensor interface with a building automation system (BAS) or demand control ventilation (DCV) system controller? If yes, describe if integration capabilities are vendor specific.

Yes - Network Thermostat CloudConnect BAS

Integration capabilities

5. If sensor can interface with a BAS or DCV system controller, is additional hardware required?

Reporting capabilities, Integration capabilities

6. How can the CO2 sensor data be logged? If proprietary software, describe (what type of account is needed, what logging intervals are available, what does it look like, and describe its capabilities including data download capabilities).

Data logged every 1-10 minutes and displayed graphically, to nearest 50 ppm, on CloudConnect webpage. Up to 90 days of data can be displayed. Data can only be downloaded with higher level subscription plans.

Installation

7. Does the sensor require specialized software for installation? If yes, describe.

Yes - Requires proprietary webpage.

Installation

8. Does the sensor require specialized training for installation? If yes, describe.

Operation

9. Does the sensor require on-going maintenance? If yes, describe.

Operation

10. Does the sensor require service contracts for ongoing data access? If yes, describe.

Yes - Sensor comes with one month of free access to CloudConnect, but after user must purchase yearly subscription to maintain access. Three plans available, from $9.95/year to $14.95/year

Miscellaneous

11. Are there any other notes about the user experience?

CO2 sensor installed in device as swappable CO2 module. Two CO2 modules available, one with a higher accuracy specification.