UDG4-4999 nSpire Touch Programmable Thermostat, with Floor Sensor, Class A GFCI, (White)

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.

We had a professional installer do the work. It was easy to install and the touch screen was easy to program. It has been working well for a few days no problems and it has worked flawlessly. Very happy.. Bill

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.

I had the lesser model, and both work great. Love the preset schedule, and a snap shot of useage/cost to operate. I would recommend this to a friend and will by another one.

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.

While a little more expense than I was hoping to pay, the installation was easy and straight forward, and the product is very intuitive

Works well

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.