Honeywell T9 Smart Thermostat

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Hi All, does anyone have any experience integrating the Honeywell T9 Smart Thermostat into Hubitat? Just wondering the compatibility is as well as general thoughts on how good this thermostat is.

I'm looking for new thermostat that has the following:

  • Integrates with Hubitat
  • Has smart phone remote access
  • Has room sensors

FYI I'm leaving ecobee since today they forced out their new eco+ climate change software...sorry but I'm looking for a good thermostat, not big brother shaming me for using AC.

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With Rule Machine (or Hubitat integrations that run automations, such as Node-RED), it is possible to use external temperature sensors to control any Hubitat-paired thermostat.

I have a Honeywell T6 z-wave pro. There's a built-in Hubitat driver for it as well as an advanced driver written by @bcopeland. My thermostat is in a bad location, so I use temperature readings from 9 Hubitat-paired temperature sensors to control it. 8 of these 9 sensors also provide relative humidity readings, and I make use of that value to ensure the RH remains around 55% while I'm at home.

I can control my setup via the Hubitat mobile app, and via Alexa, using a virtual dimmer and a few rules.

I've attached some graphs (generated using Node-RED) that indicate the average temperature in my house during Sleep and Home modes). This is data collected over the last 24 hours. There's also a graph that has readings from each of the individual temperature sensors over the same time-period.

The little momentary blips in the average temperature graph are an artefact of zeroing out the "averaging algorithm" every 2 hours or when mode changes.

BTW, I should add - my home is WAY more comfortable now than when I had an ecobee3 with 6 room sensors.

Here's some more stats:

  • Sleep mode target is 71F, and the average is 70.9F. (low average is 69.4F, high average is 71.1F)
  • Home mode target 73F, average is 72.8F. (low average is 71.8F, high average is 73.4F)

Also, I should mention - the average runtime on the heat-pump during each cooling cycle is 25 minutes and 56 seconds. So there's no short-cycling ......

Edit: One more thing. I bias the averaging such that during sleep mode, the temperature average is calculated using 4 sensors in the bedrooms and one in the living room. Whereas in Home and Away mode, all the sensors are used.

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@aaiyar How did you get all of the data for that graph?

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Looks like a node-red dashboard to me, based on the text font and color. Is super easy to funnel the data into a chart object in node-red.

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@TemptingTime

@JasonJoel is correct.

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Aaiyar,
Do you have multiple thermostats? Each considered a zone? All feeding data into the actual heating cooling system?
I also have ecobee3's and would like a smoother integration into Hubitat.

Do you mind if I pick your brain on your process?
Thanks - Erick

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Single zone, single thermostat. Just lots of zigbee sensors.

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Thank you very much Aaiyar for the informative response and I was wondering if the normal temp sensors in my hubitat system could be leveraged so glad to hear of confirmation on that.

While you're running the T6, any idea if the hubititat's drivers and phone app will support the T9?

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Aaiyar, I think I was confusing the T6 for another thermostat...the T6 looks very promising and am going to have to dig into it further tomorrow, thx

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The T9 is a cloud-dependent WiFi thermostat. There is no built-in Hubitat app/driver that supports any cloud thermostats (except the ecobee). My T6 is the z-wave version of the T6, and AFAIK, there is no z-wave or zigbee version of the T9.

There is a community driver for Honeywell TotalConnect thermostats written by @csteele. It might work with the T9. Here's the GitHub link:

My personal preference is to minimize cloud-dependent components for essential functions like HVAC.

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Aaiyar, I've been reading through the T6 manual and was wondering if you could answer a couple questions about its operation?

  • Can you temporarily override the current schedule on the thermostat unit itself withoug need of a PC or phone? For example I know you would program the daily schedule from your PC via hubitat but I'm wondering if my wife wants to warm it up a degree or 2 for a couple hours, can she just walk up to the wall unit and do that from there?

  • Can you schedule certain times to be associated with specific remote sensors? For example, run the daytime when home hours based on the thermostats thermometer but at night when at home set the temp to a sensor in the master bedroom?

Thanks again for any help!

Adam

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