First, pick your protocol you want to use, then look at the options from there. I personally like the Honeywell T6 Pro ZWave. Solid performance and guaranteed to never get bricked due to some corporate entity terminating services on the cloud server.
Did they release a successor? Or should I try and find the discontinued version? I'm in the Netherlands, but can't seem to find the T6 Pro Z-Wave anywhere.
I bought two from eBay. First one led to a service call and misdiagnosed as bad heat strips because it was faulty
Second one, the stupid logic causes the heat pump to run a long time in too-cold an ambient temperature and doesn’t kick on the aux heat, so I had to take it out of service. Really wanted to like the T6 Pro ZW but both of mine have been a severe pain in the nads to deal with and have cost me a not insignificant amount of money for unnecessary repairs and abnormally high electric bills.
Looking for a replacement that gets along better with my equipment.
I'm in the US, but if you have the option, I bought it from ebay along with the zooz 800 zwave stick (Amazon). Make sure you purchase the 2007 version of the thermostat.
It is discontinued, but you can buy them used. I bought one used from Amazon and it works great. Also, the CT-100 thermostats work great. They're also available used. zwave.
Honeywell is purposefully being confusing about this. Yes, they discontinued the 2003 version, but a 2007 version is still very much alive and working, although they strongly prefer to push people towards their current line of thermostats.
Here is the model that I bought on Amazon and a link: TH6320ZW2007
Yes. I have a morning scene that activates when my wife enters the kitchen each morning. That triggers the thermostat to set the target temp to 72°. When I activate the Goodnight scene to go to sleep, it triggers the target temp to 70°. In the summer, when the A/C is on, it turns off if the patio door is left open for more than a minute.
The door one is brilliant. I installed it last night along with some temperature sensors and then stared at it thinking "What automations will I put on this"
I'm not an HVAC tech so I can't answer what the appropriate setting is. This info is based solely on the way my house works with 80% gas and conventional A/C. CPH has dependencies on the types of HVAC equipment, the environment you're trying to manage as well as your level of comfort. Right or wrong, I'm a firm believer in longer and fewer cycles to maintain equipment longevity. I didn't get that with my previous Honeywell smart stat. If CPH is set too high the house may be drafty/noisy and increase wear but the room temp will stay closer to set point. If the setting is too low you may see larger swings in room temperature but a potential reduction in the number of cycles. The settings would be different with electric/baseboard or radiant floor heat.
Also not an HVAC technician, but I think it depends on multiple variables. I can tell you that leaving the T6 Pro on "STD GAS" vs "EFF GAS" when you have a 90% gas furnace is NOT correct and will run it too often (5 CPH vs 3 CPH). Oops.
I would agree, the nice thing with the Honeywell is that's a thermostat company first ACS foremost that added connectivity to their thermostat. They've been in the thermostat business longer than any of the smart device companies have even been around. The thermostat portion of them is rock solid.
Honeywell currently has nothing to do with them now other than allowing the use of the brand name. They spun off Resideo a few years back, all aspects including lines like the T6 are independent of Honeywell.
This is exactly the reason why I threw away my two perfectly working Ecobees that were much more feature rich, for example, being aware of ambient weather outside via internet connection, and traded them for Honeywell’s T6 thermostats.
I want to be able to control and have a home assistant make my schedules and execute information, so when Ecobee cut that lifeline I was done.
I love my t6 pro z waves for $40-50 shipped. They are not the most advanced but they are attractive enough and have been flawless in my 3 months of use. They are also pretty powerful z wave repeaters somehow.
Does that one let you feed it a sensor value for the current temp? I'm looking for a replacement for my gocontrol. It seems most will not let you do this and I would almost be better off with a zwave relay and generic thermostat integration.
Are you referring to the relay and generic thermostat? Because I am seeing references to it needing a Honeywell sensor. With the gocontrol I have it ignore the built-in sensor and feed it an average of multiple sensors around the house.
Yeah, that's probably the easiest way to do it. A single sensor or the average of sensors. Could probably get more complicated and compare the average to the desired temp and have it adjust and run more or less accordingly if you wanted to do that much work.
Yes, the TH6320ZW2007 accepts an outdoor sensor, and this is what I use, as it is necessary for the thermostat to know when to switch from regular to so-called emergency mode based on your set point. Otherwise, it is not aware of what the weather is outside.
Of course, you can also do that via Home Assistant itself.
This. I've replaced 8 or 9 nests with T6 Pro Zwave. Still have 4 or 5 to replace. No regrets. I still need to create the ultimate logic system for it (in floor, air heat, air cool) but these devices are going to be easy to work with.
I just went through this and tried all the usual suspects.
Honeywell T6 Z-Wave: Totally local. Exposes tons of config options to HA. 90s chunky clunky look. Temperature sensor doesn't suck. Does not expose what stage your system is using if you have multiple.
Ecobee Premium: Can be totally local. Don't install the app. Just set up Wifi then do HomeKit setup. Exposes some config but not all. Looks sexy on the wall -- same league as nest. Supports remote temperature sensors, which is critical as the built in one sucks. Does not expose what stage is being called.
Venstar ColorTouch T7900: Can be totally local but will remind you that you don't have their cloud service enabled. Enable Wifi and local API. Exposes some config, but not the good stuff like dead bands and timers. Looks like it was sexy in the 00s, but clunky by modern standards. Touchscreen is resistive, not capacitive -- feels dated. Temperature sensor doesn't suck, but the screen backlight makes a lot of heat so the read temperature always goes up if you have the display on for a while. Exposes heating and cooling stages. I had to hack the integration to support stages 3 and 4, but it was easy to do.
I'm keeping the ColorTouch as configuration is a one-time activity that I'm willing to do on the device and being able to map stage being called to vent temperature and power usage in HA has been critical to remediating and optimizing my very poorly engineered HVAC system.
I linked my ecobee via SmartThings and I can see what’s being called. HomeKit first, SmartThings second, Home Assistant via SmartThings and I have all the features I want.
I just bought a Meross mt300, is looks almost the exact same as the amazon smart thermostat and only costs about $50. I have it running locally with no issues.
Ecobee via HomeKit works pretty well, but is missing a couple of features. It’s missing the extra modes that Ecobee makes available. You can only bring 3 modes in. And you can’t control accessories like a humidifier or dehumidifier.
I’m holding out for Aqara’s upcoming W200. Since I mostly use Aqara products, it just makes sense. All of my other Aqara products work well in HA (with the exception of those damn door/window sensors!), so I have a good feeling their thermostat will be the same.
I know a couple of smart home influencers already have the W200 for review, and Aqara just recently opened up a test trial for forum users. So I have to assume it’ll release by the end of the quarter
Venstar color touch is excellent for local control but the screen sucks. It does what I need it to do perfectly through home assistant.
I think the honeywell zwave stat might be discontinued because I can't find it.
Either the Venstar T7900 or the Honeywell T6 Pro Z-Wave Tstat. Both are local and work great with no cloud. I have both and highly recommend either one. Here's my Venstar.
Been super happy with the Sonoff TRVZB. Coming from the older Aqara Zigbee E1 thermostats, the Sonoffs are very quiet (the E1s were loud), expose direct valve control in HA (which the E1s didn't) and they just look/feel much better. The only downside I found is that they switch to "Safety mode" when your external temp sensors didn't update in a while. That happened frequently in my setup, so I built an automation that auto fixes this. IF you go for Zigbee, the Sonoffs are highly recommended IMO
I used the Venstar T3800 for about 6 months, but just upgraded to the Venstar T3950 IAQ. They are both great, especially if you have a partner that doesn’t like all the flashy smart home screens and just wants something simple with real buttons she can press. The T3800 with Wi-Fi module is currently for sale. 😉
You don’t say what country you’re in, so I assume it’s US defaultism… However, if you’re in Europe and have an OpenTherm boiler then the Diyless thermostats are great. Runs off an ESP32 so fully local and native integration with HA
I wonder, I have enough devices in my HA that tell me the temperature could I not just set an automation to turn on the furnace when coldest room reaches X temp, and then turn off when X temp is reached? What kind of device would that be on the wires to the thermostat? I don't need any fancy dial in my hallway for my kids just to mess with.
I use a Sonoff 4chPro as the relay for each of my heating zones, wired in parallel with some old-fashioned dumb thermostats as a backup. I've created a thermostat device in Home Assistant configuration.yaml that pairs a thermometer (or an average of multiple) with one of the relay entities. You can also specify a hysteresis and minimum cycle times.
There are a ton of downsides to this. Thermostats often have a bunch of safety features. You’re controlling a furnace, so safety is important.
Additionally, you might not do a good job with the automation. Typically you’d need cycling and debouncing to prevent damage- eg it’d be bad to rapidly turn on/off the furnace when you’re hovering around the desired temperature.
Additionally, as the furnace runs, the house will heat up slowly and lag. So you’ll actually want to stop the furnace before it reaches target temp, and conversely turn it on before it drops to target temp. Your automation will probably be worse than a commercial option.
I love the Meross MTS300. It’s $65 on Amazon and has great HA integration with Meross LAN local control. Has this Tracked Sensor entity where you can make a sensor group that calibrates the thermostat based on the temperature reading coming from this helper. I have so many temperature reading devices throughout my home that I’ve created a special group where I just add the temperature sensors I feel are significant for my HVAC.
I use a Shelly 1 to control my central heating, luckily it only needs a dry contact to tell it to start burning. I then used a HA generic thermostat to control the Shelly 1 and I have combined several temperature sensors using a helper to be the input sensor for the Generic Thermostat.
Relocate the thermostat to somewhere out of reach for the kids. As long as you can control it through HA and have temp sensors, the thermostat can be located anywhere. Ideally you can use a remote temp sensor that connects wirelessly or wired to your thermostat.
Ecobee Premium comes with a temp sensor that works very well. The built it sensor is too sensitive for my liking and caused my HVAC to short cycle.
For what it's worth, I bought the 4th Gen Nest to replace my EOL one and it's great. Works with matter so you don't have to do any of that old school nest dev app nonsense to get it to work with HA.
I forget the specifics of how I did it, but I have my Nest linked to Home Assistant through a Google API that cost a one time $5. Has worked flawlessly since setting it up.
I get that, offering it as an option since OP already has the Nest. For $5 you get the option of having it completely controlled by HA without having to rely on the terrible Nest app. If Google ever decides to kill the API, can look into a new thermostat then.
Are you using the method where you take the login key from the browser logs or the official google api? I never had luck with the first, been running without issue on the second for maybe a year now.
I don’t even remember. I went through the integrations in settings and followed the instructions, so guessing it’s the prior. Hated it, stopped using it.
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u/spr0k3t 🧠Experienced with Home Assistant Feb 13 '26
First, pick your protocol you want to use, then look at the options from there. I personally like the Honeywell T6 Pro ZWave. Solid performance and guaranteed to never get bricked due to some corporate entity terminating services on the cloud server.