- Brand: WarmlyYours
- Model Name: nSpire
- Item Dimensions LxWxH: 3.25 x 3.5 x 6 inches
- Special Feature: Programmable
- Color: White
- VERSATILE: The touchscreen thermostat is programmable with up to 6 separate temperature events per day. The floor sensor allow your system to cycle on and off and continuously adjust to save on energy costs.
- MORE CONTROL: This dual voltage (120V/240V) thermostat puts the control where it belongs, at your fingertips. Includes floor sensor. 3.5” Touchscreen Energy Log for tracking use.
- BENEFITS: Features “child-lock” function, works with hardwired WarmlyYours radiant panels. 3-year warranty Built-in self-testing GFCI
- 3-YEAR WARRANTY: WarmlyYours stands by all their products and offers a 3 year warranty on all control products.



















SMH –
Great thermostat that’s very intuitive (unlike most) with a well thought out design. The one thing that may be useful for those consider the product is that the display goes into a screen saving mode, and the display becomes a dark grey/black. I purchased the display assuming it would always have a white background, which worked well for the theme of the bathroom of all white. Unfortunately, there were no other photos provided when purchased to know this. See photos included in review to see what it looks like “on” and while in screen saving mode. While this is a minor quibble for my specific situation, it may be useful to know for those considering who are looking for an all white background, and at the time of writing I was only able to find this product that aesthetically matched what I was looking for. Overall is a great product and I would purchase again.
SloopJohnB –
This Radiant Floor Touch Screen Programmable Thermostat with GFCI, Includes Floor Sensor Model # UDG4-4999 was easily installed to replace the failed OJ Microline thermostat (10+ years old). I didn’t even have to remove the under ceramic tile sensor (it was supposed to be installed in a plastic tube but I’d hate to have to find out!), just unhook the six wires (two load, two line, and two sensor) and hook them up to the new thermostat.The new touch screen thermostat is intuitively easy to program as well, and you can calibrate it to the actual floor temperature. I used an infrared thermometer and adjusted the wall thermostat to read the same as the floor surface temperature.
Tom Wilson –
Here is the good and bad.My old thermostat didn’t have a large screen like this. Programming was not at all intuitive, nor was it wireless. The UWG4-4999 has a nice large touchscreen (3 1/2″), shows you the date, time, current floor temp and floor temp set point in large, easy to read numbers. It can be controlled by an app on your smart phone, at the screen or on a PC from anywhere, anytime (by logging into an account you set up).I’m really quite proficient at setting things up – intuitively or if decent instructions are provided. The instructions with this were good, but didn’t include some critical steps. I emailed the manufacturer with questions and they said they were only the manufacturer and didn’t support consumers. The manufacturer is in Denmark. It wasn’t until later I discovered a sticker on the box with a distributor phone number, Warmly Yours, that had sold the item through Amazon.Here was the issue with the lack of instructions. I installed the thermostat in the wall and powered it up. I started going though the set up steps and then it asked me for a distributor ID. I could not find a mention of a distributor ID in the instructions, on the original carton from the manufacturer, or on the sticker from the reseller in the U.S., Warmly Yours. I did notice an 800 number on the sticker and called Warmly Yours. They answered the phone right away (24/7 support) and were able to provide me with the distributor ID. For those purchasing the unit, the ID you will need is 10266.The instructions also didn’t tell you how to set up the app or what the name of the APP was. I downloaded the APP (called Microline – I had to guess the name in the App Store), installed it and fired it up on my smart phone. The first screen asked for my email and a password. Nowhere on the screen did it say New User Setup. At that point, I emailed the manufacturer and that is when they told me they don’t provide assistance to consumers.As I learned from Chris at Warmly Yours, setting up the app is a a three step process. You first go to your unit on the wall that is running and go to the overflow icon in the upper right (three horizontal bars), then select WiFI/Weather from the Menu and it will ask you for your email and to choose a WIFI in your house as well as the password. You are sent a confirmatory email which runs through the manufacturers server in Denmark. You respond to the email they send you and set up a password. Once this is confirmed, you go back to your thermostat and enter the email and password which is not that easy to enter on the touch screen panel. You also enter your zip code (US) so that the unit can display weather graphically in your area.I have another (different) thermostat in another room and the floor is warm at 82. I have this one set to 90 and its not yet warm on the feet after a couple of days, although the cold was taken out of the floor. The floor temp is 78-82. I don’t how long it takes to warm up a bathroom with ceramic tile. I am going to let this go for five days, and if it doesn’t increase, call the U.S. distributor, Warmly Yours with questions.The customer service from Warmly Yours (U.S. based reseller) is A+ in my opinion. I had to call them twice and they answered the phone quickly and were knowledgeable about the product. Thanks Chris.
M. Mueller –
The previous owners of our house had radiant heating installed underneath tile in one section of one floor. The system is well over 10 years old, and the legacy thermostat was a major pain to use and not intuitive at all. I had long wanted to replace the existing thermostat and was keeping an eye on this unit. Surprisingly, it was over $50 cheaper here on Amazon than on the OEM website, so I jumped on it.The unit itself is well made, and the OEM has videos posted on their site that explains the upgrade process which SEEMED very easy/straightforward. Since the legacy installed floor is 10+ years old and from a previous owner’s tenure, we had zero documentation on the system.The only fly in the ointment came during setup after I had physically installed the unit. First, the programmer asks for the maximum power output for the floor. I wasn’t anticipating this data requirement, and after some research it APPEARS the OEM limits the floor mats to 1800W on 120V, so that’s the value I entered. Second, the system wants the resistance of the temperature probe. It comes with one, but I was wiring into the existing, legacy probe. Again, there is zero documentation to go on, but went with the default 10 ohm setting. Couldn’t even find the probe specs on the OEM website. I guess I chose well, because the system is working flawlessly at the moment.Programming is now a breeze, changing settings (for travel, etc.), and monitoring energy usage is simple and very straightforward. I am VERY happy with the upgrade. I did not opt for the WiFi-enabled unit, since it’s such a small area of the house and the utility of this function would be extremely limited, not worth the upcharge. Hopefully, this unit will outlast our tenure in this house.
JacktheRipper –
The Amazon package arrived in good shape, but the first thing I noticed was that the box inside had been opened, and the thermostat was not labelled as a Warmly Yours nSpire unit. It seemed to be an OEM version. No instructions, and no little package of screws either. I went ahead and installed it, and it works much better that the original Honeywell unit that failed during a power outage event.A couple of points to know about:(1) Buried on the second screen of the setup menu is a feature designed to protect laminated wood flooring. If enabled, and it was on mine, it limits the temp to 82 Deg F, even if you set the thermostat higher. I turned it off since I have a ceramic tile floor.(2) I measured the floor temp with an IR temp sensor, and found it ran much hotter than what the thermostat was reading. I needed a nine degree calibration offset to make them agree. Could be just my sensor, or it could be that I have a 12K Ohm sensor, and I had set the thermostat for a 10K Ohm sensor–I don’t know.
adam –
Stopped working within a year and half and the company is horrible to deal with. Strongly do not reccomend!
Joseph Tucker –
Looks nice and seems to work well. not the best looking warm floor unit I’ve used, but good for the $
VadimB –
We have 2 of these. One we have purchased from Amazon years ago and had to return bc it did not work with a slave unit properly. This one works standalone and appears to be fine. A star was taken off bc with the previous unit I had to call tech support = and that took an effort, since the product is by a european company which could not help me with the problematic unit. An identical unit purchased locally worked with the slave relay without issues.