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Harmoni thermostats are one of the most efficient underfloor heating control ranges with energy saving features, simple setup and ease of use, as well as advanced functionality. Harmoni thermostats are beautifully designed and will look good in any room. Choose between the Harmoni 25 digital thermostat or the 100+ with Wi-Fi option, which can be used in conjunction with the Harmoni App.

Product reviews

4.7100% Positive (3 reviews)

Ratings based on data collected by third party reviewing platform.


Trusted Customer
16 December 2021 09:11

DEVIreg Touch Thermostat - Pure White

Excellent thermostat and quick delivery

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Excellent service and quick delivery.


Luis Lopes Correia
8 December 2021 10:05

DEVIreg Touch Thermostat - Pure White

Excellent price and quick delivery.

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Happy with the quality and delivery time.

We are incredibly grateful that you took the time out to leave us a 5-Star review.


Gary Holland
31 January 2021 08:14

Harmoni HT100 Digital Thermostat

Unit appears to be ok and operational. The build quality is perhaps not the best as the unit I received doesn’t fully 'snap' in to the 2 ball-bearing locking arms on the wall bracket to mount the unit totally secure to the wall. One arm appears to engage and secure 1 side of the unit but the other side appears slightly loose. Discussing with Heater Shop they have provided feedback to the manufacturers on this.

Programming the unit is a bit confusing if you want to use it only as a heated floor thermostat controlled only from a floor mounted sensor. To their credit Heater Shop followed up on this with the manufacturers as well.

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Unit arrived quickly but I had some issues with the unit (thermostat) and raised a ticket through their website. Ticket was followed up a bit slower than I would have hoped but once they responded and we discussed they followed up very quickly on all the ssetup/technical points I raised.