Z-Wave Plus KI STZW402WB+ Thermostat (White) for Electric Baseboards and Convectors

I have this installed in the Living Room of my condo, connected to 2 radiant heating panels in our ceiling. It is replacing a Mears M21-DP. Install was pretty easy, just take your time and make sure to identify your line and load sides. Pairing with my SmartThings v2 hub was painless.The device handler for SmartThings does not have native Alexa support but you can search and find code to fix that. It is pretty much copy and paste but it does involve some back-end work.The unit runs flawlessly. It has 3 heat stages rather than 1 so I will be interested to see if that fact will help my heating bills. It does supply power to the heating device even when it is off, I assume this is very low power to keep the unit alive. At the highest heat setting the unit will get warm, this is normal according to the manual.The device does try to display the outdoor temperature, however this seems a bit flawed as it only updates when you change the setting.March 22, 2018 - Stepro has updated their custom device handler for SmartThings, as well as created a custom app, that fixes the outdoor temperature issue.The only downside at this point is that I will hear clicking now and then from the device. The sound is similar to a relay engaging so I am assuming that the internal components are just getting worked in and this is normal.

I've had this in my z-wave network for a few weeks now. It works quite nicely so I'm happy with the unit. I replaced two thermostats; one was easy to install, the other took me a lot of internet searches to figure out; the instructions could have been more helpful, but I guess the sellers probably find it to more legally safe to suggest just spending a few hundred dollars to get your $60 thermostat installed.Looks are where this thing is really lacking. The unit itself is huge, but the display and buttons are this tiny affair off in the corner. If you're going to have the thing take up that much wall space, at least put a large display on it so that it's visible when you aren't right in front of it. As it is, it has the feel of being designed in the 90s. I guess if they wait another few decades the design might be "classic"!If there were any other z-wave thermostats on the market that I could find, I'd probably have bought them based solely on style, but as these were all that I could find and I have no complaints about their functionality. In fact, their feature where you can have two settings (one each for "eco"and "normal" modes) is very handy. I live in California so turn my heat on every other year or so, so I leave them on eco mode at 12C/54F the vast majority of the time and then just switch to normal heating mode when my apartment actually gets cold.

Love it. I've had it for about a week and have zero issues. Set up was a breeze. Took me less than 10 minutes from the time I turned off the breakers, until the time I was sitting on my couch adjusting the temp through the Smartthings app. The setup controls are a little bulky. You definitely need the user guide as it is not at all intuitive. Again though, installation involved connecting two wires and mounting it to the wall. The fact I had to read the user guide to figure out how to change the display to Farenheight and to connect it to my phone is probably being a little picky.I have a very old, drafty house with a boiler to heat the downstairs and an electric line voltage baseboard heater for the upstairs. I have a Nest to control the boiler, and have been looking for something to control the upstairs for a few years. This is the only one I could find that had smart capabilities. It's not a easy on the eyes, or have the bells and whistles of a Nest, but that's probably not a fair comparison. At the end of the day it controls the heat just as well.All in all I'm exptremely please with how easy it was to install and how well it works.

awesome device!!easy installation, Z-Wave setup was a breeze, device is well made, looks good and functions well.it even has variable power modes (seems like low, med high) where it cycles on/off, keeping the heater from going "full on" and blasting too much heat out. i love this, as before the heater would turn on and overheat the room every time. best part is it manages this for you (seems like it's based on set point vs current temp delta size).for V2, I'd love the following-- ability to feed it (via Z-Wave) a remote temp to use in conjunction or instead of the internal sensor-- better reporting for operating status... low/med modes are simply reported as raw heat on/off/on/off/on/off cycles (every minute or so)-- ability to set a completely OFF mode vs just ECOI wrote a custom plugin in my Z-Wave controller (HomeSeer) to sync what my Nest thermostat wants to do over to this device... so now my electric baseboard heater tracks Nest's smart home/away modes and variable temps throughout the day. Finally the forced air furnace and the electric baseboard heater are now on the same page. Yay!

I recently bought 4 Stelpro Z-Wave Plus KI STZW402WB+ thermostats and installed them this past August. Of the 4 only two remain operable. One has simply failed and will no longer turn on. The other, which is more concerning, looks to have a wiring defect that almost caused a house fire. I've attached a picture and if you zoom in you can see where the wire failed under load. The unit worked fine up until December when we had several days of subzero temperatures. The load on the wires must have been heavy during this time but I wouldn't expect a wire for a thermostat to burn up like this. I've tried contacting Stelpro support multiple times and they have been absolutely non-existent. I definitely would not recommend these units.