The best underfloor heating thermostats, compared.
Top pick: Meross MTS205 WiFi thermostat – Highest star line in this set, 4.5 from 605 reviews, for electric floor heating with an app schedule. Best value: KETOTEK manual 16 A floor thermostat – About £14.99 with 4.3 from 831 reviews, a stated 16 A load, and a 3 m probe, with no weekly programme. Updated October 2026.
An underfloor heating thermostat is the wall control for one floor zone. In the UK that is usually a 230 V flush unit. A battery radiator head is a different product. Electric mats and cables need a contact that can carry the load, commonly 16 A, plus a floor probe so the surface cannot run away. Water underfloor heating needs a control that calls an actuator or a wiring centre. A listing that says it is not for water-based heating will not do that job. Heat source, the probe, and the floor-finish limit are set out in the [underfloor heating thermostat buying guide](/hub/thermostats/underfloor-heating-thermostat/sub/underfloor-heating-thermostat-buying-guide). You use it to call heat in that zone and, on an electric mat, to stop the floor surface running away. It is not a radiator valve and it is not a whole-house boiler programmer. Listings often state 16 A, about 3.7 kW at 230 V.
An underfloor heating thermostat is the wall control for one floor zone. In the UK that is usually a 230 V flush unit. A battery radiator head is a different product.
38 products checked · 64 hrs invested · +21,400 readers
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Personal buying guide
Question 1 of 2
What is under the floor?
The Meross MTS205 is a glass-touch Wi-Fi stat for electric floor heating only, at about £49.99, with a 5 to 35 °C range, up to eight periods a day, and Alexa, Google Assistant, and SmartThings without a hub. It is rated 4.5 from 605 reviews, the highest star line in this set, though several of the first 50 reviews are not from the United Kingdom. UK reviewers replaced a failing Warmup 3iE, reused the probe already under the tile, and found the app easier than the old wall unit. Live and neutral are required, and one fitter changed a 35 mm box for 47 mm. A non-UK review calls the built-in air sensor unreliable unless the external sensor is used. The listing does not state a heating-load amp figure. The 5 W line is not that load, the bullet says it is not for water-based heating, and a window-saving percentage on the listing is a claim, not a measured result. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: An electric mat where you want the strongest star line in this set and an app schedule.
Less suitable: Water pipes, a two-wire wall, or anyone who needs a printed 16 A heating-load line.
Specifications
Common questions
Will it run water underfloor heating?
No. The bullet says electric floor heating only, not water-based.
Does the listing claim Alexa?
Yes. Alexa, Google Assistant, and SmartThings, with no hub, on 2.4 GHz. Live and neutral are required.
Is 5 W the heating load?
No. The stored file treats the 5 W line as not a heating-load figure, and it does not state the load in amps.
The KETOTEK M9.716 is a wall programmable stat for electric underfloor heating at about £25.99, with 5+2, 6+1, and 7-day patterns plus a manual hold, and a 3 m probe for air, floor, or both. It is rated 4.4 from 270 reviews, the highest star line among the wired programmers in this set. Reviewers say it was easy to fit and that an offset lets you calibrate the probe. Programming is not described as intuitive, the factory wires are called very short, and a review says it needs a deep back box. The setpoint menu runs to 90 °C, which is not a timber or vinyl limit. Connectivity says Wi-Fi while the bullets have no app, and the wattage field says 2,300 W against a 16 A claim. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: Electric underfloor heating where you want a wired weekly programme and a stated 16 A load, without an app.
Less suitable: A shallow back box, water pipes, or anyone who wants phone control.
Specifications
Common questions
Can each day have its own programme?
The listing offers 5+2, 6+1, and 7-day patterns, plus a manual hold. It does not describe a phone app.
What is the temperature range?
The menu setpoint is 5 to 90 °C. That is the menu range, not a floor-finish target.
Does it have a child lock?
Yes. Child lock is listed with calibration, frost protection, and power-off memory.
The Meross MTS215 is the Matter electric-floor stat at about £50.99, rated 4.4 from 87 reviews, many of them not from the United Kingdom. It schedules up to eight periods a day, needs live and neutral on 2.4 GHz, and the bullets name Matter, Apple Home, Siri, Alexa, Google, Home Assistant, and SmartThings with no hub. Reviewers report a Matter join to Home Assistant without the Meross cloud. One UK title says it is not reliable. Pairing fails if the app model is entered with a space in the model name, or if the phone is on 5 GHz. A review says native HomeKit support is gone and Matter remains, and Matter exposes fewer settings than the Meross app. The specification line does not state a load in amps. The bullet excludes water-based heating. A savings percentage on the listing is a claim, not a test. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: An electric floor where Matter or Home Assistant matters more than the highest star count.
Less suitable: Water pipes, a stated 16 A load, or anyone who still expects native HomeKit.
Specifications
Common questions
Does the listing name Matter?
Yes. The bullets name Matter, Apple Home, Siri, Alexa, Google, Home Assistant, and SmartThings, with no hub.
Is it for water underfloor heating?
No. The bullet says electric floor heating, not water-based. Live and neutral are required, on 2.4 GHz.
What load does the specification line state?
None. The stored file does not state a load in amps. A Swedish review mentions existing 16 A floor heating. That is not a specification line.
The KETOTEK KTF0155A is a flush Wi-Fi stat at about £44.99 that programmes 5+2, 6+1, and 7-day patterns, six periods, and a holiday mode in Smart Life or Tuya, with Alexa and Google Assistant on 2.4 GHz. The listing claims 16 A, a child lock, and an open-window pause when the room temperature drops. The stored 4.3 from 1,067 reviews is the same line and the same review names as the KTF0163A file, so it is not a second sample. Reviewers praise weekday schedules in the app and swaps onto an existing probe. The display light leaks at the sides at night, and one back plate had no pattress screw holes. Wi-Fi pairing failed for one buyer, who was left on manual only. A floor probe is not on the included-components line for this ASIN. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: An electric floor where you want Smart Life and Alexa at about £44.99 and you accept the shared review file.
Less suitable: A buyer counting 1,067 reviews as proof of this white unit alone, or anyone who needs a probe confirmed in the box.
Specifications
Common questions
Does the listing claim Alexa?
Yes. Voice control is Alexa and Google Assistant, with programming in Smart Life or Tuya on 2.4 GHz.
Is there a holiday mode?
Yes. The schedule includes manual mode and holiday mode as well as the weekly patterns.
Is the 4.3 from 1,067 a separate sample from KTF0163A?
No. The stored file says the review text and that star line also appear on the KTF0163A listing.
The KETOTEK KTF0163A is the black 16 A Wi-Fi stat at about £49.99, with live and neutral required, a 2.5 m NTC 10 kΩ probe in the box, and the same Smart Life, Alexa, and 2.4 GHz schedule as the white KTF0155A. The 4.3 from 1,067 line is shared with that other file, including the opening UK names, so the count is not an independent second sample. Reviewers say the app was easier than an old wall programmer and that they often kept the existing probe. The body is called deep, with a 45 mm box or a spacer wanted, and side light leaks at night. Wi-Fi failed when the password had special characters or the hub changed band. One order had a dead unit, and a high-pitched whistle put one reviewer off using it in a bedroom. The heat source on the listing stays electric. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: Electric underfloor heating where you want a named 10 kΩ probe, a 16 A claim, and a deep back box.
Less suitable: A bedroom if the whistle bothers you, a shallow box, or water pipes.
Specifications
Common questions
Which Wi-Fi band does the listing require?
2.4 GHz only. The bullet says it does not support 5 GHz, and live plus neutral are required.
What probe is in the box?
A 2.5 m NTC 10 kΩ external probe, with two screws and a manual.
Is the star line independent of KTF0155A?
No. The stored file says the same 4.3 from 1,067 line and the same review names appear on the KTF0155A listing.
This KETOTEK dial switches electric underfloor heating from a rotary setpoint of 5 to 40 °C, using a 3 m floor probe as a high limit, at about £14.99 with a claimed 16 A load. It is rated 4.3 from 831 reviews, the largest review file in this set that is not shared across two ASINs. Reviewers who had just left a complicated programmer call it simple, and several say the existing floor sensor worked. The supplied screws are called too large against 3.5 mm UK screws. One user had to leave it on maximum before the floor heated, and an earlier unit failed. There is no weekly timer, water heating is not claimed, and live and neutral are required. The attribute block says Wi-Fi, while the bullets describe a mechanical knob with no app. The floor-limit menu is 25 to 55 °C, and the listing also says the probe keeps the floor from exceeding 50 °C. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: Electric underfloor heating where you want a dial, a stated 16 A load, and a long review history.
Less suitable: A weekly schedule, an app, water pipes, or a two-wire battery-stat replacement.
Specifications
Common questions
Does it control water heating?
Water heating is not claimed. The listing limits it to electric underfloor heating.
Does it need a neutral?
Yes. It is not for two-wire or battery stats.
Is there a weekly timer?
No. Control is on, off, and a rotary setpoint. Reviews say it is the wrong unit if you want a timer.
The KETOTEK KTF0172A is the dearest Wi-Fi unit in this file at about £57.99, rated 4.3 from 90 reviews, with live and neutral required and a 3,680 W wattage line rather than a stated amp figure. It offers 5+2, 6+1, and 7-day schedules with up to six periods, holiday mode, Smart Life or Tuya, Alexa, and an open-window pause, plus a built-in sensor and an external floor sensor. Some buyers paired Smart Life quickly and used it as an Aube TH232 replacement that later used a 10 kΩ probe. Tuya’s English strings are called clumsy. One programme sat at 5 °C and would not follow on and off periods, and another unit would not join Smart Life. It cannot replace a battery thermostat, and 2.4 GHz is not spelled out on this listing the way it is on the other KETOTEK Wi-Fi rows. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: Electric underfloor heating where you want Smart Life and a 3,680 W line, and you already have live and neutral.
Less suitable: A battery or two-wire stat, a tight budget, or anyone who needs the amp figure printed on the listing.
Specifications
Common questions
Can it replace a battery thermostat?
No. The stored listing says neutral and live are required, and it cannot replace a battery-powered thermostat.
Does the listing claim Alexa?
Yes. Smart Life or Tuya, plus Alexa or Google voice commands, with a child lock and an open-window pause.
Is the load given in amps?
No. The wattage line says 3,680 W. The stored file does not record an amp figure.
The KETOTEK M6 runs a weekly programme in 5+2, 6+1, or 7-day, or a manual hold, for electric heating or an on/off water-valve actuator, at about £24.99. The menu setpoint is 5 to 90 °C, which is a menu range rather than a floor-finish target, and the pack includes a 3 m probe so you can use air, floor, or both. It is rated 4.2 from 271 reviews. UK reviewers used it as a direct replacement and said it fitted an existing box. The recurring complaint is the paper manual: instructions are called lousy, and programming is described as a nightmare until the pattern is learnt. Child lock, frost protection, calibration, and power-off memory are in the feature list, and there is no app. The wattage field says 3,000 W beside a 16 A bullet, so the load is not a single clean number. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: A wired weekly programme for electric heating, or a call to an on/off water actuator.
Less suitable: App control, or anyone who needs one unambiguous load figure and a clear floor-finish number.
Specifications
Common questions
Can it call a water actuator?
The bullet says electric heating devices or an on/off valve actuator for water-based heating.
Is it a Wi-Fi stat?
No. The stored listing says wired, with no app.
Does it have a child lock?
Yes. Child lock is in the feature list, with calibration, frost protection, and power-off memory.
The DEWIN TRFM-1024 is a manual dial for electric floor heating at about £10.79, with a setpoint of 5 to 40 °C and an LED that lights while heating is on. Live and neutral are required, so it will not replace a two-wire or battery thermostat. The amazon.co.uk line is 4.1 from 16 reviews, but only one stored review is marked United Kingdom, and that review describes fan control on a standard pattress rather than a floor zone. A review said the unit worked once fitted, while another found the supplied probe less flexible than the sensor already in the wall. That existing probe could not be reused because the impedance did not match. The wattage line says 3,600 W. The attribute block also says Wi-Fi, yet the bullets describe a hand dial with no programme. Treat the Wi-Fi line as a listing clash, not as an app you can install. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: A cheap manual control for electric floor heating where you will fit the supplied probe.
Less suitable: Anyone who wants a weekly programme, a confirmed app, or to keep a probe of unknown resistance.
Specifications
Common questions
Does the listing say it is programmable?
No. The listing records a manual dial with no weekly programme.
Does it need a neutral?
Yes. The bullets require live and neutral, and they say it is not a two-wire or battery-stat replacement.
How is it rated on amazon.co.uk?
The listing shows 4.1 out of 5 from 16 reviews, at about £10.79 in this file. Only one of the stored reviews is marked United Kingdom, and that review is about fan control.
The Denash is a black push-button LED thermostat at about £18.37 whose title claims 16 A and a smart controller for electric underfloor heating. Four amazon.co.uk reviews give it 3.7, and three of those are a single line. Reviewers call it easy to install, but one UK review says it is not as advertised, is not a smart device, and does not connect to the internet, against a Wi-Fi attribute. The box line lists the thermostat only, while a bullet claims internal and external sensors and an overheating defence with no temperature figure. The supply text in the title does not give a clear voltage attribute. A child lock is described on the rear panel. With four reviews and a contradicted smart claim, this is a thin file to trust for a buried mat. The score is the stored star conversion, not a laboratory test.
Pros
Cons
Best for: A buyer who wants a push-button LED body and will ignore the smart title after the review that says it does not connect.
Less suitable: Anyone buying it as a Wi-Fi stat, or anyone who needs a probe confirmed in the box.
Specifications
Common questions
Does it connect to the internet?
The attribute block says Wi-Fi. A UK review says it is not a smart device and does not connect.
Is a floor probe in the box?
The included-components line lists the thermostat only. A bullet claims internal and external sensors.
Does it have a child lock?
Yes. The bullet describes a child lock on the rear panel.
The GLOGLOW is listed as a non-programmable electric floor thermostat at about £13.58, with a claimed 16 A and 3,600 W, a setpoint of 5 to 40 °C, and a floor-limit range of 25 to 55 °C. The bullets describe a 2.9 m outer sensor, IP20, and an English manual, and the listing says it is not suitable for North America. The stored file has no customer-review line, so there is no star rating and no UK comment on whether the probe fitted a real mat. The protocol field says Wi-Fi, while the title says non-programmable and the bullets never describe an app. The sales rank sits under programmable thermostats, which does not match a unit with no weekly pattern. Neutral is not stated, so you cannot tell from this file whether a two-wire wall will accept it. Until reviews exist, the 16 A claim and the floor-limit menu are catalogue lines only. The card score is 0 because there is no review line to convert.
Pros
Cons
Best for: A buyer who wants a non-programmable electric-floor stat on paper and will wait for reviews before trusting the 16 A line.
Less suitable: Anyone who needs UK review evidence, a weekly programme, or a clear neutral requirement.
Specifications
Common questions
Can it run a weekly programme?
No. The title says non-programmable and the schedule is none.
What load does the listing claim?
16 A and 3,600 W, with a 2.9 m outer sensor and a floor-limit range of 25 to 55 °C.
Is there an amazon.co.uk review score?
No. The stored file has no customer-review line for this ASIN.
Shelf prices, stars, and review counts are the amazon.co.uk figures stored for these eleven listings, captured on 15 October 2026. They are not a live reload. The number on each card is the stored 0–100 figure for this set, which here is the star line times 20. A listing with no review line scores 0. It is not a laboratory test and not a measured energy saving. Listing limits and review faults stay in the written assessment. The weights below are the buying checks used to read the set. There is no separate scoring sheet for this comparison.
Heat source
25%Electric mat or cable versus warm-water pipes. Meross MTS205 and MTS215 bullets say electric floor heating, not water-based. The KETOTEK M6 says electric devices or an on/off water actuator.
Load
20%Where the listing states 16 A, keep the mat under that, or have an electrician switch the load with a contactor. The 5 W line on the Meross MTS205 is not the heating load.
Floor probe
20%Electric systems should not run on the air sensor alone. Match ohms at 25 °C. 10 kΩ is common. 6.8, 12, 15, and 33 kΩ also exist. Reuse a buried probe only if the resistance matches.
Wiring and floor limit
20%Live and neutral, back-box depth, and 2.4 GHz where the listing states a band. Design comfort is often 29 °C at the surface. Timber, vinyl, and laminate makers often want 27 °C. A menu to 90 °C is not a target. IP20, where stated, is a dry room.
Reviews and shelf price
15%Stars and review volume from the amazon.co.uk line, with the captured shelf price kept beside them. This set runs from about £10.79 to about £57.99. A shared review file and a missing review line stay visible.
Start with the heat source, then the load and the probe, then the floor finish. A star rating does not tell you those three. The eleven listings below are amazon.co.uk pages, with prices and review counts captured on 15 October 2026, not a live reload. A menu that runs to 90 °C is not a surface target. Voice control is not a measured saving for your home.
An underfloor heating thermostat is the wall control for one floor zone. In the UK that almost always means a 230 V flush unit. A battery radiator head is a different product. You use it to call heat in that zone and, on an electric mat, to stop the floor surface running away. It is not a radiator valve and it is not a whole-house boiler programmer. Electric mats and cables need a contact that can carry the load. Listings in this set often state 16 A, about 3.7 kW at 230 V.
Meross MTS205 and MTS215 bullets say electric floor heating, not water-based. They will not call a manifold actuator. The KETOTEK M6 is the listing in this set that names an on/off valve actuator for water-based heating. Read that line on the ASIN you are buying.
Electric floors should not run on the air sensor alone. Match ohms at 25 °C before you reuse a buried probe. 10 kΩ is common. A DEWIN review could not reuse the existing sensor because the impedance differed. The KTF0163A box names a 2.5 m NTC 10 kΩ probe. The KTF0155A included-components line does not.
The KETOTEK M6 and M9.716 menus run to 90 °C. That is the menu range. Design comfort is often 29 °C at the surface, and timber, vinyl, and laminate makers often want 27 °C. A smart title is not a connection either: a Denash UK review says that unit does not connect.
Decide the job before the brand. An electric mat needs a contact that can carry the load. Where the listing states 16 A, keep the mat under that, or have an electrician switch the load with a contactor. About 3.7 kW at 230 V is the rule of thumb behind 16 A. The Meross MTS205 does not state a heating load in amps. Its 5 W line is not that load.
Match the probe before you trust a schedule. 10 kΩ at 25 °C is common. 6.8, 12, 15, and 33 kΩ also exist. The KTF0163A includes a 2.5 m NTC 10 kΩ probe and needs a deep box. Set the floor limit for the finish: often 29 °C at the surface in occupied rooms, and often 27 °C on timber, vinyl, and laminate. A menu to 90 °C is not that target. Wi-Fi models that state a band want 2.4 GHz. The KTF0163A says it does not support 5 GHz.
Three typical situations, each with a recommendation from this comparison.
You are swapping a failed electric-floor head and you want an app schedule. The Meross MTS205 is the top pick at about £49.99, with 4.5 from 605 reviews. It is electric floor heating only, and it needs live and neutral. The listing does not state a heating load in amps.
You want on, off, and a rotary setpoint, and you do not need a weekly programme. The KETOTEK manual 16 A floor thermostat is the best value at about £14.99, with 4.3 from 831 reviews, IP20, live and neutral, and a 3 m probe. Water heating is not claimed.
The floor is water pipes, so you need a control that calls an on/off actuator. In this set that listing is the KETOTEK M6, at about £24.99, with 4.2 from 271 reviews. Meross bullets say electric floor heating, not water-based. The paper manual on the M6 is a known complaint.
The top pick is the Meross MTS205, at about £49.99, for electric floor heating where you want an app schedule and the highest star line in this set. It has 4.5 from 605 reviews. The listing does not state a heating load in amps, and the bullet says it is not for water-based heating. The best value is the KETOTEK manual 16 A floor thermostat, at about £14.99, with 4.3 from 831 reviews, when you want a dial, a stated 16 A load, and a 3 m probe, and you do not need a weekly programme. A water-pipe zone needs a listing that calls an actuator. In this set that is the KETOTEK M6. The card score is the stored star conversion, not a laboratory test.
Meross MTS205 WiFi thermostat
Highest star line in this set, 4.5 from 605 reviews, for electric floor heating with an app schedule.
KETOTEK manual 16 A floor thermostat
About £14.99 with 4.3 from 831 reviews, a stated 16 A load, and a 3 m probe, with no weekly programme.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources for notifiable electrical work, floor-surface limits, and electric floor heating. Listings are the amazon.co.uk captures for these eleven ASINs on 15 October 2026, not a live reload. Prices on amazon.co.uk move.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars, and review counts come from those listings. We did not run a laboratory test. The scores rank a listing inside this set only.
