[bhouston]

I recently upgraded to an EcoBee Premium and it has a lot of overlap with this device:

- Temperature (we have multiple sensors, one per major area of the house)

- Presence (the multiple sensors also record occupancy)

- Humidity

- CO2

- VOx

What is nice is we can use the CO2/VOX to drive our HRV (heat recovery ventilation) to get fresh air from the outside into the house, but we only need to do this on demand, thus saving significant energy as compared to just constant HRV usage.

We can also use the humidity sensor to drive our humidifier.

We can use the occupancy + temperature to guide the AC / furnace.

And we have an external temperature sensor to allow us to smartly use the heat pump versus furnace.

I view this as a little more practical than just recording values - it makes them actionable and automatic.

[sedgjh23]

Just a heads up, the EcoBee doesn’t use a CO2 sensor, it just guesses what the value is. I have the same thermostat and was getting wildly different readings than my more expensive AirThings View Plus. Checked the EcoBee support website[1] and it made a lot more sense.

“Based on the VOC measurement, it can also estimate carbon dioxide (CO2) levels. The sensor doesn’t directly measure CO2 but assesses CO2 levels based on the average correlation between VOCs and CO2 in exhaled human breath.”

[1] https://support.ecobee.com/s/articles/air-quality-sensor-faq...

[bhouston]

Which seems fair, because I live in a normal home with breathing humans and not an industrial setting where VOCs are produced in other ways.

How wildly off were the readings btw? And were you doing things related to VOCs? Which reading was erroneously under reported compared to actual, CO2 or VOC?