The best alexa thermostats, compared.
Top pick: tado V3+ wireless starter kit – Complete V3+ starter with bridge, receiver, and hot-water programming, and 4.5 from 307 reviews, the highest star line on a full starter here. Best value: KETOTEK boiler thermostat 3 A – About £44.99 with 4.1 from 840 reviews, for a 3 A dry-contact boiler input where live and neutral are already at the wall. Updated October 2026.
An Alexa thermostat is a heating control you can also set from an. It is not a thermometer and not a radiator valve. The jobs are a combi, a second zone, or an electric underfloor mat, and the cable already in the wall matters more than the voice logo. A heating-only kit does not schedule a cylinder. An electric-floor stat does not fire a gas boiler. tado X and tado do not mix. An add-on with no hub or border router in the box will not come online by itself. Heat source, the wires, and whether the hub is in the box are set out in the [Alexa thermostat buying guide](/hub/thermostats/alexa-thermostat/sub/alexa-thermostat-buying-guide). You choose it when the heat source, the cable at the wall, and a hub or border router line up. Quality is the right output, a way online that is either in the box or already at home, and a schedule that still runs in the maker’s app when you stop using voice.
An Alexa thermostat is a heating control you can also set from an. It is not a thermometer and not a radiator valve.
34 products checked · 58 hrs invested · +24,100 readers
Swipe for more
1-2 of 10
Personal buying guide
Question 1 of 2
What are you heating?
The tado V3+ kit is a complete boiler starter with a wireless sensor, receiver and Internet Bridge in the box. At 4.5 stars from 307 amazon.co.uk reviews, it has the highest star line in this comparison and is the top pick on the available listing data. The title includes a hot-water programmer, and Alexa, Siri and Google Assistant support are listed. Reviews suggest the boiler-side work is straightforward only when you already understand the terminals, while a stone-house owner needed a Wi-Fi extender. This older product family does not mix with tado X, so choose the generation before adding zones. The score reflects marketplace data and completeness, not a laboratory test.
Pros
Cons
Best for: A complete V3+ boiler installation needing heating and hot-water programming.
Less suitable: Homes committed to Matter and tado X, or buyers seeking a simple add-on.
Specifications
Common questions
Is this a complete starter?
The included-components line lists the sensor, the wireless receiver, and the Internet Bridge.
Does the title include hot water?
Yes. It says a programmer with hot water control.
What do install reviews warn about?
Several say the boiler end is straightforward only if you already know the terminals, and one stone-house review needed a Wi-Fi extender.
This Hive kit gives a combi boiler app and voice control, with the Nano 3 hub already in the box. Its 4.4-star line from 353 amazon.co.uk reviews is reassuring, and owners often like controlling the heating from a phone once pairing is complete. The receiver supports standard control or OpenTherm where the boiler is compatible. Setup is not always quick: some reviewers describe lengthy hub and receiver resets before the app finds the system. It is also a heating-only kit, so it is the wrong box for a conventional system that needs separate cylinder control. Professional installation is sensible if you are not competent with mains and boiler controls.
Pros
Cons
Best for: Combi owners who want a complete Hive starter kit with its hub included.
Less suitable: Conventional boiler systems with a hot-water cylinder, or homes that already have a Hive hub.
Specifications
Common questions
Does this Hive kit control hot water?
The listing says it controls heating only and is not for a conventional boiler that needs separate heating and hot water control.
Is the hub included?
Yes. The title and the included-components line name the Hive Nano 3 hub.
What do reviews say about setup?
Several UK reviews praise phone and voice control once it is paired. Others describe a long hub and receiver reset before the app would see the unit.
The tado Wireless Smart Thermostat X starter combines a wireless sensor and Receiver X for a boiler or heat pump. The listing gives it 4.4 stars from 286 amazon.co.uk reviews and says no separate hub is required for this starter. It supports relay and OpenTherm control, while hot water is available in the tado app. Alexa integration uses the newer Matter route, but a UK review notes that voice control covers heating rather than hot water. One reviewer also needed a 2.4 GHz-only network during setup. It is a poor upgrade choice for an existing tado V3+ home because the product lines are not compatible.
Pros
Cons
Best for: A new tado installation where Matter and a complete wireless boiler starter are priorities.
Less suitable: Existing tado V3+ homes or anyone expecting Alexa hot-water commands.
Specifications
Common questions
Do I need a separate tado bridge?
The bullets say the wireless receiver connects the boiler and that no extra hub is required.
Can Alexa control hot water?
The title includes hot water via the app. A UK review says Matter voice control covers heating only, not hot water.
Will it work with tado V3+?
The listing says tado X products are not compatible with tado V3+ or older.
The KETOTEK KTF0155A is a 16 A controller for electric underfloor heating, not a boiler thermostat. It includes a 2.5 m floor probe and supports six programme periods in the Smart Life app. Alexa can change the temperature or switch the heating on and off, while the weekly programme remains in the app. The 4.3-star line from 1,067 amazon.co.uk reviews gives it the largest review sample in this comparison. It needs 2.4 GHz Wi-Fi and mains wiring, so it is not a direct replacement for every existing wall control. Choose it only after checking the mat load, sensor arrangement and back-box wiring.
Pros
Cons
Best for: Electric underfloor heating where a floor probe and app schedule are required.
Less suitable: Boilers, wet underfloor systems or a battery-powered two-wire replacement.
Specifications
Common questions
Will it run a gas boiler?
No. The listing is for electric underfloor heating, with a 16 A output and a floor probe in the box.
Does Alexa do the weekly programme?
The listing says Alexa or Google Assistant can set temperature or on/off. Programming stays in the Smart Life app.
Which Wi-Fi does it need?
The bullets say 2.4 GHz, not 5 GHz.
The wired tado Smart Thermostat X is an add-on for a suitable existing system, not a complete starter kit. It supports relay and OpenTherm control where a wired thermostat is already fitted, and the listing names Thread and Matter. The 4.2-star line is based on 212 amazon.co.uk reviews. You still need a Bridge X or another Thread border router, neither of which is included. One UK buyer reports that four engineers could not make it work with their boiler, although other reviewers describe an easy second-zone swap. It also cannot join a tado V3+ system, so confirm both the boiler interface and tado generation before ordering.
Pros
Cons
Best for: Adding a wired zone to an established tado X or compatible Matter setup.
Less suitable: A first thermostat purchase or any existing tado V3+ installation.
Specifications
Common questions
Is this a starter kit?
No. The listing says it needs a Bridge X or another Thread border router, and that hardware is not in the included-components line.
Will it add to a tado V3+ house?
The listing says tado X products are not compatible with tado V3+ or older.
What went wrong for one UK buyer?
One review says four engineers could not get it working on their boiler and they returned it. Other reviews describe a simple second-zone swap.
This Hive package targets combi and multizone use but deliberately leaves the Hive hub out of the box. That can avoid paying for duplicate hardware if your home already has a compatible hub. The listing shows 4.2 stars from 195 amazon.co.uk reviews and names OpenTherm, while the attribute block lists Zigbee rather than Wi-Fi. Crucially, that block does not name Alexa, so the voice-control promise from the separate with-hub ASIN should not be transferred to this listing. Reviews are mixed on pairing: one owner ran the receiver link without an app, while another could not pair it. Treat it as an expansion or replacement purchase after checking your existing Hive setup.
Pros
Cons
Best for: An existing Hive household that needs the relevant thermostat and receiver without another hub.
Less suitable: A first Hive purchase or anyone relying on this ASIN for a documented Alexa claim.
Specifications
Common questions
Is a Hive hub in the box?
No. The title says no Hive hub is included.
Does this page list Alexa?
The attribute block does not name Alexa. Do not assume the with-hub kit’s voice line applies to this ASIN.
Can it run without the app?
One review says the radio link to the receiver was enough and they did not buy a hub. Another could not pair it at all.
The KETOTEK KTF0155C is a low-cost boiler thermostat with a volt-free dry contact rated to 3 A. It has 4.1 stars from 840 amazon.co.uk reviews, giving this best value pick a much broader review base than most budget rivals here. Smart Life handles six-period schedules, while Alexa can change temperature or switch heating on and off. The important limitation is wiring: it needs live and neutral and explicitly cannot replace a two-wire or battery-only thermostat. It also uses 2.4 GHz Wi-Fi. For the right boiler input and available mains supply it offers useful control for about £44.99, but it is not interchangeable with the similarly priced KETOTEK electric-floor model.
Pros
Cons
Best for: A compatible boiler with a 3 A dry-contact input and mains available at the wall.
Less suitable: Electric underfloor heating, battery-only positions or two-wire installations.
Specifications
Common questions
Can it replace a two-wire thermostat?
The listing says no. It needs a live and a neutral, and it cannot replace a two-wire or battery-only thermostat.
How does it switch the boiler?
Dry contacts with no voltage, max 3 A. The listing says to confirm the boiler accepts that before you buy.
What is Alexa limited to?
Temperature or on/off. The bullets say programming stays in the Smart Life app.
The meross MTS215B is a mains thermostat aimed at combi boilers and wet underfloor heating. Its compact 86 mm face and programmable control suit a fixed wall installation, and the listing names Matter and Wi-Fi connectivity. Reviewers have used the meross skill with Alexa, though the available product data does not document hot-water control. The 4.0-star line comes from 416 amazon.co.uk reviews. Two UK reviews report failed display segments, including one failure within a week and another within eight months, although one buyer received a replacement. Check the terminals and available mains supply rather than assuming it can replace a battery wall stat.
Pros
Cons
Best for: Mains-powered combi or wet underfloor installations where the wiring matches.
Less suitable: Battery-only two-wire replacements or buyers who need documented cylinder control.
Specifications
Common questions
What heating does the title cover?
The title says a combi boiler and wet underfloor heating. It does not say electric mat heating.
Is Matter listed?
The connectivity protocol attribute says Matter and Wi-Fi.
What failed in reviews?
Two UK reviews report a display segment that stopped working, one within a week and one within eight months. One of those buyers got a replacement from support.
This Beok model is one of the few listings here that explicitly describes a two-wire combi thermostat. It offers app scheduling and names Alexa in the title, while a USB-C cable provides an alternative to battery power. The listing shows 4.0 stars from 90 amazon.co.uk reviews. Battery endurance is the main concern: reviewers report anything from roughly a week to six weeks depending on the cells. One review says the heating defaults to on when the batteries run out, which makes regular checks important. It can be useful where no neutral reaches the old thermostat position, but boiler compatibility still needs confirming before purchase.
Pros
Cons
Best for: A compatible combi installation with only two control wires at the thermostat.
Less suitable: Anyone wanting long unattended battery life or documented hot-water control.
Specifications
Common questions
Is it for a two-wire stat cable?
The title says a 2-wire thermostat for a combi boiler.
How long do the batteries last?
UK reviews in the file describe about a week, about a month, and about six weeks, depending on the cells. Two reviewers powered the USB-C port instead.
What if the batteries die?
One reviewer says the default is heating on all the time if the cells run out.
This Beok package includes a wireless thermostat and mains receiver for a combi boiler or water-fed underfloor system. Alexa and Google Assistant are listed, with up to six daily temperatures set through Tuya or Smart Life on 2.4 GHz Wi-Fi. Battery or USB-C power gives the room unit more placement flexibility than a fixed mains stat. However, the evidence base is thin: the listing shows 3.5 stars from only 10 amazon.co.uk reviews. One UK reviewer reports that the transmitter and receiver lost their link. The included receiver makes it more complete than an add-on, but the limited review record warrants caution.
Pros
Cons
Best for: A budget wireless combi or wet-floor setup where the receiver specification matches.
Less suitable: Buyers who want a well-established review record or OpenTherm documentation.
Specifications
Common questions
What is in the box?
Thermostat, receiver, stand, manual, screws, a USB-C cable, and a jumper.
How solid is the review sample?
The listing shows 3.5 from 10 reviews. One UK review reports the transmitter and receiver losing their link.
Does it name Alexa?
The bullets say Alexa or Google Assistant, with schedules in Tuya or Smart Life, on 2.4 GHz Wi-Fi.
Shelf prices, stars, and review counts are the amazon.co.uk figures stored for these ten listings. They are not a live reload on 17 October 2026. The number on each card is the stored 0–100 figure for this set, which here is the star line times 20. It is not a laboratory test and not a measured gas saving. Listing limits and review faults stay in the written assessment. The weights below are the buying checks used to read the set.
Heat source and output
25%Combi heating only, heating plus hot water, wet underfloor, electric underfloor, or a second zone. A heating-only Hive kit does not schedule a cylinder. An electric-floor stat does not fire a gas boiler.
Wires at the wall
25%Two-wire volt-free, live and neutral, or a floor probe. The KETOTEK KTF0155C says it cannot replace a two-wire or battery-only thermostat. The Beok two-wire model is the one titled for that cable.
Hub or border router
20%In the box, already at home, or missing. Hive 852109 and the wired tado X add-on do not include that piece. tado X and tado V3+ do not mix.
Alexa route and schedule
15%Hive skill, Smart Life or Tuya, or Matter on tado X. tado says Matter does not control domestic hot water. Schedules stay in the maker’s app. Voice is not assumed to work without broadband.
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 £42.99 to about £164.99. A thin review sample stays visible in the score.
Start with the heat source, then the cable at the wall, then whether a hub or border router is already in the house. A star rating does not tell you those three. The ten listings below are amazon.co.uk pages, with the prices and review counts stored for this comparison, not a live reload on 17 October 2026. Schedules stay in the maker’s app. Voice control is not a substitute for broadband, and it is not a measured gas saving for your home.
An Alexa thermostat, as UK shoppers search for it, is a heating control you can also change from an Echo. It is not a room thermometer and not a smart radiator valve. You choose it when the heat source, the cable at the wall, and a hub or border router line up. Quality is the right output, a way online that is either in the box or already at home, and a schedule that still runs in the maker’s app when you stop using voice. This comparison is ten amazon.co.uk listings, not a laboratory test.
The Hive kit with the Nano 3 hub controls heating only. It is the wrong box for a conventional system that needs separate cylinder control. Read the hot-water line on the ASIN you are buying. The tado V3+ title includes a hot-water programmer. On tado X, hot water in the app is not the same as an Alexa hot-water command.
Hive 852109 leaves the hub out of the box. The wired tado X add-on needs a Bridge X or another Thread border router, and that hardware is not included. tado X and tado V3+ do not mix. A starter is the Hive Nano 3 kit, the tado X wireless receiver kit, or the tado V3+ kit with its Internet Bridge.
The KETOTEK KTF0155C says it needs a live and a neutral and cannot replace a two-wire or battery-only thermostat. The Beok model titled for a 2-wire combi is the listing aimed at that cable. Its reviews focus on battery life, and one review says heating stays on if the cells run out.
Decide the job before the brand. A combi can be heating only or heating plus hot water. A conventional system with a cylinder is a different control. Wet underfloor and electric underfloor are different outputs. The KETOTEK KTF0155A is the electric-floor listing here: max 16 A, a 2.5 m probe in the box, about £44.99, and 4.3 from 1,067 reviews. It does not fire a gas boiler. The boiler KETOTEK at the same shelf price is a 3 A dry contact and needs a live and a neutral.
A starter puts the way online in the box. An add-on assumes you already have it. Hive voice uses the Hive skill. Smart Life and Tuya cover the KETOTEK stats and the wireless Beok, and the weekly programme stays in the app while Alexa changes temperature or switches heating on and off. tado X uses Matter. tado says Matter does not control domestic hot water, and the old tado skill does not run tado X. The Hive ASIN without a hub does not name Alexa in its attribute block.
Three typical situations, each with a recommendation from this comparison.
You want an Echo boost and an app schedule, and the cylinder or the combi hot-water channel has to be programmed too. The tado V3+ starter includes the sensor, the wireless receiver, and the Internet Bridge, at about £57.50. Call a Gas Safe engineer if the receiver work opens the boiler.
You are replacing a floor controller, and the probe and the amp rating decide the fit. The KETOTEK KTF0155A is a 16 A electric-floor stat with a 2.5 m probe, at about £44.99. It needs 2.4 GHz Wi-Fi and mains wiring. It does not fire a gas boiler.
The wall already has a live and a neutral, and the boiler accepts a volt-free contact up to 3 A. The KETOTEK KTF0155C is the best value at about £44.99, with 4.1 from 840 reviews. It cannot replace a two-wire or battery-only thermostat.
The top pick is the tado V3+ wireless starter kit, at about £57.50, for a boiler that needs a receiver, an Internet Bridge, and hot-water programming in one box. It has 4.5 from 307 reviews, the highest star line on a full starter in this set. The best value is the KETOTEK KTF0155C, at about £44.99, with 4.1 from 840 reviews, when the boiler accepts a 3 A dry contact and the wall already has a live and a neutral. It cannot replace a two-wire or battery-only thermostat. A heating-only Hive kit, an electric-floor stat, and a tado X add-on with no border router are different jobs. The card score is the stored star conversion, not a laboratory test.
tado V3+ wireless starter kit
Complete V3+ starter with bridge, receiver, and hot-water programming, and 4.5 from 307 reviews, the highest star line on a full starter here.
KETOTEK boiler thermostat 3 A
About £44.99 with 4.1 from 840 reviews, for a 3 A dry-contact boiler input where live and neutral are already at the wall.
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 Gas Safe, Boiler Plus in England, and notifiable electrical work. Listings are the amazon.co.uk captures for these ten ASINs, not a live reload on 17 October 2026. 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.
