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The T9 Smart Thermostat works with Smart Room Sensors to help you adjust the temperature from anywhere and stay cozy in the rooms that matter. Place sensors where you want to see each room’s temperature and humidity. Use the multi-room display on the thermostat’s touchscreen — or in the Honeywell Home app — to focus on rooms based on occupancy or a specific schedule you choose. When focusing on multiple rooms, the T9 works toward creating an average temperature, balancing the needs across the whole home.
SAVE MONEY AND ENERGY. Adjust your ENERGY STAR certified thermostat from anywhere with your mobile device, or let your home automatically react to your schedule with Auto Home/Away Scheduling. Save even more by checking with your energy provider about available energy savings rebates to save on your purchase (rebate finder link above). Plus, eligible customers can enroll in their local Utility’s “DEMAND RESPONSE PROGRAM” which can reward you for allowing the utility to slightly adjust your AC or furnace temperature settings when there is high energy demand.
LIVE AND SLEEP SMARTER. Choose the temperature in a specific room, like the bedroom, to be exactly what you want it to be, to help get a better night’s sleep. Or let the Smart Room Sensors automatically detect which rooms people are in and focus comfort where it matters automatically.
AMAZING SENSOR RANGE. The battery powered Smart Room Sensors utilize unique Honeywell Home technology to deliver an efficient signal up to 200 ft range. (Could be further depending on home construction.)
MULTI-ROOM FOCUS. Don’t be forced to choose one room over another, the T9 Smart Thermostat can handle multiple rooms to focus on (requires sensors).
CONTROL IT YOUR WAY. Control the T9 using the Resideo app or through Amazon Alexa, Apple HomeKit, Google Assistant, and more.
COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup. Does NOT work with electric baseboard heat (120-240V). C-Wire required.
DO IT YOURSELF SIMPLE INSTALL. With guided installation setup couldn’t be simpler. The included power adapter is an easy-to-install, low-voltage alternative to a C-wire, so the thermostat is compatible with most homes.
Before purchasing, check to see if this thermostat is compatible with your home and to determine if your home needs a C-wire power adapter.
Works with most heat/cool oil furnace systems. Will not work with heating only oil furnace systems unless a C-Wire is present.
decadeindc –
All of the modern thermostat features you want, nothing unnecessary. Easy to install and operate.
Coming from a 1st generation Nest Learning Thermostat, so that’s my reference point (Google shut off app access, which is the only reason I switched). Installed the T9 myself in about 40 minutes. Would have been faster if I wasn’t super careful about labeling wires (which you should be!). We have a simple single stage gas forced air and traditional central a/c unit that’s about eight years old, so that made things very easy to hook up. The Honeywell T9 had good — and at times great — directions for getting the T9 up and running. Three-screw-hole wiring/mounting plate fit well in my thermostat’s current location, no patching and painting needed.Once powered up, the on-screen directions were decent enough to get a temp and hold it while I programmed the rest of the thermostat. Got WiFi running, then the app (printed directions are a little dated, go search for the First Alert by Resideo app) and connected it natively and to Google Home (which has limited functionality). Went back to the thermostat to set up screen preferences and then to the app to program in a schedule. All told, maybe a couple hours.Things I like: The screen is extremely legible from a distance and you can easily tell when the system is on by color, much like Nest. The T9 exactly matches the design and color of my Honeywell ProA7 security panel, which is a nice bonus. Never thought that would matter to me, but it does look coordinated! After a few hours of new operation, the temp appeared quite accurate judged against a 3rd party thermometer and generally the thermostat works as expected. I do like that I can program in a complex schedule and the thermostat learns how long my equipment takes to reach desired temps WITHOUT all the extra learning-your-behaviors capabilities of the Nest Learning Thermostat. I never used that functionality, maybe you view that omission as a negative than a positive. Vacation mode! The Nest was sorely missing this and it’s good to have finally.Things I don’t like: The thermostat in idle mode just displays the ambient room temperature and (by way of colored background) whether the system is heating or cooling. It does not also display the setpoint and fan status like my old Nest LT. Would really be helpful to show both of those at a glance without having to touch the thermostat or pull out the app. The app itself was a little clunky trying to program. There are groupings of similar days, but no clear way to set one schedule, then simply add similar days of the week. The only way I found to group days is go through each day and set the same schedule I wanted. Only then would days show up grouped. (I CAN edit the grouped days at once.) This might just be the First Alert app. And I do have to say, the Nest app also has its problems with scheduling, which required a lot of thumb dexterity to land on the right temp and time setpoints in its grid system. The remote sensors. These appear to be effective only if you use a lot of them. The sensors take an average of sensors and thermostat temps OR prioritize a sensor or thermostat temp. I guess if the temp doesn’t vary too much in your house, a handful could be ok. One is kind of useless to me because temps diverge too much in the house and we only have one HVAC unit where we should have one for each floor. Makes an average comfortable for no one. Anyway, I’d skip buying the thermostat packaged with just once sensor … buy just the tstat and once you’ve dialed it in, buy sensors if you really want. Seems like a waste of money until both the sensors AND HVAC system can follow people from room to room. Lastly, there are a few features in the Nest app I miss here like time-to-temp adjustability, the drying feature, compensating for direct sunlight, granular fan-on time adjustability, etc.I spent a lot of time comparing the T9 to the Nest Learning Thermostat 4th Gen. (Also considered Ecobee, but didn’t want yet another IoT platform to manage.) In the end, I didn’t need all the human activity learning capability on the Nest and I was also not happy with Google yanking remote connectivity for the 1st (and 2nd!) Gen LT when it was working perfectly fine (also have issues with Google stopping production of Nest Protect, but that’s another story). The T9 has all I want (programmability, good reputation, good compatibility with HVAC systems, robust remote connectivity, learning and adapting to my equipment’s ability to heat and cool my home, easy DIY installation, decent design) and not much that I don’t want. In the end, it could be better and I was still giving the Nest consideration for its better on screen info, beautiful design and screen, app features, and my familiarity with its interface. But I’m glad I went with the T9. It doesn’t feel like overkill. Longevity is the big unknown, and I’ll update this if the T9 doesn’t last as long as expected.
DenSanAZ –
Super easy install, works great!
(this review is long but detailed – hope it helps someone)I hesitate to review this thermostat too soon, as I bought a Honeywell RTH9585WF1004 ($200) 14 months ago, gave it a good review, then 13 months later it completely lost any accuracy of the actual temperature – and why I now have the T9. I also hesitated to continue with Honeywell, as the past 2 wi-fi thermostats from Honeywell were horrible (TH9320WF, returned within one month, and the RTH9585, worked for 13 months) – but I didn’t like the other brands available. The T9 is brand new, and the remote sensors sounded awesome for my house – 2 story, 1 AC unit, terrible air circulation, temp varies between floors/rooms.INSTALL: I removed the inaccurate Honeywell RTH9585, and installed the T9 according to the very basic install instructions. I had one issue with installation which was my own fault – set the wrong type of HVAC unit in Setup, so the AC wouldn’t turn on – then I caught my mistake. I’m still not entirely sure I have the correct type selected, as the T9 indicates my heat pump is 2-stage and I don’t believe it is…I’ll find out in Nov when I need heat in Arizona.SMART ROOM SENSORS: Bought a total of 4 Smart Room Sensors, 2 for upstairs (one in M Bed) and 2 for down. After installing the Base unit, went to Settings and simply followed the unit’s displayed procedure for installing/naming the Smart Room Sensors (place one sensor, return to the Base, name it, then go on to the next sensor).SCHEDULING: This section was really easy setting up a “5+2” day schedule which allows for multiple Away/Stay cycles (vs the usual 2 On/Off, On/Off cycles on previous thermostats). It was also really easy choosing which Sensors to use in the programming. Example: WAKE time, I’m in the Loft on the computer, so that’s the Sensor that the Temperature is based on. AWAY time is mid afternoon (Peak Pricing) so the temp is set higher. HOME is at evening (when Peak Pricing ends), I’m always downstairs in the Kitchen or Family Room, so the Temperature is based on those 2 Sensors, SLEEP at night the Temperature is based on the Sensor in the M Bed. More cycles can be added – I’m not sure if they can be named differently. I have the sensors set for times, but they can be used as motion detectors to detect Activity, making them active. If multiple sensors (that you selected) detect activity, the temperature is based on the average of the Active sensors. I don’t know what happens if a sensor senses brief activity (like grabbing something from the kitchen then leaving that room, example) or what happens once one goes to bed, thus there is NO activity. For me, using set times is better. Geofencing is also an option but not one I need/use. It detects (via your cellphone) when you’re in/out of range and adjusts the temp based on that. (how it works with a family, I don’t know) I’m honestly not gone for more than several hours at a time, plus I have a zoo so can’t let the house get too warm/cold.HONEYWELL HOME APP (Android): After a week using the Schedule I’d set, it needed a bit of tweaking with some temp changes and changes in renaming/moving a Sensor. I had already installed the Honeywell Home App on my phone but hadn’t really messed with it – so I did my “tweaking” of the T9 programming through the App, not the Base unit. It was a bit confusing at first (it’s not super intuitive) but, once I got the layout of the App, I was able to make temp changes, move a Sensor, rename a Sensor, adjust some minor details. Using the App (once I got the hang of it) was easier to program the T9 than using the Base unit – I was able to do it sitting down in another room vs standing, hunched over at the Base unit. The App can’t be used for the Initial Setup of the Base unit, obviously.CONS: 1) Wi-Fi is supposed to be 2.4Gh or 5Gh. I tried to set the Base to my 5Gh signal…it found the signal but would not connect to it – I got an error message and told to contact Honeywell Support. I didn’t want to mess with that (I’ve read it needs a Firmware update – I just haven’t checked if that’s true) so it’s set to the 2.4Gh signal. Honestly, don’t know what diff it makes, why would a thermostat need a faster signal? Only reason I can think of is that my phone is set to the 5Gh and the T9 to 2.4Gh – BUT I was still able to reprogram the Base using the App, so I don’t know.2) The instruction manual is very basic; it gives very brief install instructions, the pictures of the wiring could be a little bigger/clearer. There are no instructions for installing/setting up the Sensors (the Sensor box has a very brief install/program/pairing instruction). That’s all described (fairly well) on the Base units display.3) The Honeywell site has no more instructions than what’s in the box. There are some VERY short (~2min) videos on how-to for a few basic things but I didn’t watch them. An Online User/Help Forum would be a great addition, I’m sure most people have the same basic questions and some need more detailed instructions – forums are super helpful. It’s possible they do have a Forum somewhere but I didn’t see one or a link.4) Alexa is supposed to work with the T9…and it does (once you add the Skill through Alexa – make sure to remove the app/skill for older thermostats) but it’s rather confusing. The Alexa App did a search for new items and it found the T9 Base, as well as the 4 Sensors. I can use really basic commands BUT you have to use the name you gave to the Base and/or Sensors…I said, “Alexa, raise the temperature 1 degree” and it replied, “I found multiple items…”. I haven’t explored it enough to know whether I can say, “Raise the temperature of Kitchen 1 degree” or so on for the other Sensors – and again, Honeywell has NO online instructions for using Alexa or other voice apps. On the other hand, for now I have the programming/scheduling JUST right for all rooms and various times of day, so I’ve not needed to change it since my tweak.5) The price is a bit high. Over $300 for the T9 and 4 Sensors (especially since I spent $200 last year for the previous Honeywell unit). So far, having the house a LOT more comfortable and NOT having to be changing the thermostat setting throughout the day, it seems to be worth the money.6) The sensors are applied using double-sided tape. This is both a pro and a con. Even after cleaning the wall where one sensor was going, the sensor fell off the wall 5′ to the tile floor. The tape is nice for not having to use screws and in that I decided to move one of the sensors, but I’d feel better using a screw.PROS: 1) It’s only been 2 weeks, but the T9 is working great and it’s nice having various rooms of the house at slightly different temps at different times.2) Easy installation. For my HVAC unit (12 yo heat pump) the wiring was simple enough and I already have the C-wire. The T9 does come with an adapter for homes without a C-wire, I don’t know how easy it is to use.3) The Setup was actually very easy to use (aside from the 5Gh Wi-Fi not working).4) The Honeywell Home App is also easy to use, once one understands the interface.5) Multiple Home/Away cycles. I’m generally home all day so I don’t need more than the usual 2 On/Off, On/Off cycles but I’m sure the additional cycles are convenient for some households.Final thoughts: I’ve read several other reviews complaining of needed firmware update and a hassle of needing to use 2 Wi-Fi phones to do the update. I couldn’t get the 5Gh to function, but the 2.4Gh works just fine. I guess some people have their Wi-Fi set up so there aren’t 2 separate signals? I’m not sure – but I might find out someday if I ever decide I really want the 5Gh signal. I’ve also read people complaining about the App not working. I’ve had no issue at all with the app. Also, I’ve seen people state that if the power goes out, the entire T9 configuration and schedule is lost. I haven’t had power issues, I just hope that’s not the case. One would think that the settings are saved either at Honeywell Cloud or on the phone, if not the unit itself (though it doesn’t use batteries). I hated the previous Honeywell Wi-Fi thermostat, but it never lost it’s programming so I can’t comment. In my experience so far, even though the included instructions were very basic, the setup for the T9 was straightforward and easy to comprehend using the Base unit’s displayed instructions. I only hope that I didn’t spend $300+ on a Honeywell Thermostat that will only last 13 months, as my last $200 unit did. So far, I love it.
Joseph Nardi –
Super thermostat that has remote sensors for different rooms that allow priority temperature control.
Shabin rasheed –
In the catalogue it is mention that thermostat will work only on 24 V
Cynthia Garza –
Es bueno y fácil de usar, manejo todo desde la app en el celular
Vernon C. –
BUYER BEWARE! THIS ITEM NOT SUITABLE FOR USE IN UK!!! This product is designed for use with US electrical systems only, so should NOT be sold in UK! Also, despite returning this item several week ago, I am till waiting for a refund and have now taken up with Amazon Customers Service. YOU HAVE BEEN WARNED! Would like to rate as negative, but have to give at least one star to get this review published!
Stacon –
Very happy with product, it works as expected and was easy to install.