Thermostats

Updated: October 2026Hub-Seite

Thermostats covers frost thermostat, radiator thermostat, room thermostat, smart home thermostat, smart radiator valve and thermostat socket. Each comparison says what that product is for, and which checks still apply when the listings change.

Once you have the product type, the comparison is where the current listings live. Shelf prices and makers stay there.

Comparisons

Alexa thermostat

Boiler, wires and hub in the box

Compare 10 Alexa thermostats on amazon.co.uk, from about £42.99 to £164.99. Match the boiler, the wires and the hub, then see the top pick and best value.

Comparison guides

Danfoss thermostat

RA head, Eco or wall stat

Compare seven Danfoss thermostats on amazon.co.uk, from about £16.99 to £280. Match the valve or the wall job, then see the top pick and the best value.

Comparison guides

Frost thermostat

Plug-in, wired boiler or greenhouse

Compare five frost thermostats on amazon.co.uk, from about £13.58 to £25.99. Match a plug-in heater, a wired boiler stat or a greenhouse, then see the top pick and best value.

Comparison guides

Heimeier thermostat

Valve thread and head scale

Compare 8 Heimeier thermostats on amazon.co.uk, from about £14.51 to £64.15. Match the valve thread, then see which listing is the top pick and best value.

Comparison guides

Oventrop thermostat

M30 thread, clamp or Unibox

Compare nine Oventrop thermostats on amazon.co.uk, from about £11 to £130.75. Match the valve thread or clamp, then see the top pick and best value.

Comparison guides

Radiator thermostat

Head, valve set or smart TRV

Compare 12 radiator thermostats on amazon.co.uk, from about £4.00 to £159.08. Match a head, a valve set or a smart head, then see the top pick and best value.

Comparison guides

Room thermostat

Dial, wireless kit and receiver

Compare four room thermostats on amazon.co.uk, from about £13.99 to £129.99. Match the wires and the receiver, then see the top pick and the best value.

Comparison guides

Smart home thermostat

Hub, OpenTherm and hot water

Compare 8 smart home thermostats on amazon.co.uk, from about £29.91 to £164.99. Match the hub, boiler and hot water, then see the top pick and best value.

Comparison guides

Smart radiator valve

Hub generation and boiler call

Compare seven smart radiator valves on amazon.co.uk, from about £22.30 to £207.15. Match the hub and the boiler, then see the top pick and the best value.

Comparison guides

Thermostat socket

13 A load, probe and timer modes

Compare 12 thermostat sockets on amazon.co.uk, from about £11.99 to £39.99. See the top pick, the best value, and which 13 A load line to trust first.

Comparison guides

Underfloor heating thermostat

Electric mat, probe and floor limit

Compare 11 underfloor heating thermostats on amazon.co.uk, from about £10.79 to £57.99. Match electric or water heating, then see the top pick and best value.

Comparison guides

Wi-Fi room thermostat

Boiler interface and box contents

Compare 7 Wi-Fi room thermostats on amazon.co.uk, from about £32.99 to £156.44. Match the boiler, the wires and the box, then see the top pick and best value.

Comparison guides

Guides

View all articles →

These guides cover when a room stat is past repair, why many smart thermostats need 2.4 GHz Wi-Fi, and what Boiler Plus asks for in England when a gas boiler is replaced.

Diagnosis6 min read

Alexa control hot water heating: what voice can do

You ask the speaker for hot water before a shower, and either the radiators tick on or nothing in the airing cupboard changes. The search behind that

October 2026Read

Rules7 min read

Boiler plus smart thermostat: England's extra rule

You are replacing a gas boiler in England, and the quote says the job is not finished unless you add a smart thermostat. Sometimes the line is shorter

October 2026Read

Maintenance6 min read

Thermostat frost protection holiday mode: a low limit

You are at the front door with a suitcase, the January forecast is below freezing, and the heating app is offering Off. That button looks like the way

October 2026Read

Common questions about thermostats

What is the difference between a room thermostat and a TRV?

A room thermostat calls the boiler or pump for the whole zone it serves. A thermostatic radiator valve only throttles one radiator. Approved Document L expects a room stat or programmer plus TRVs on the other radiators. The room with the wall stat usually keeps a manual valve so the boiler can still shut off.

Can tado X join an existing tado V3+ home?

No. tado X and tado V3+ are separate generations in the comparisons here. Bridge X, Wireless Receiver X and X heads do not mix with a V3+ Internet Bridge or V3+ heads. Pick one line before you buy a starter kit or a spare head.

Why do many Wi-Fi thermostats ask for 2.4 GHz?

Many wall stats and plugs state 2.4 GHz only. A phone on 5 GHz during setup may never see the device. Splitting the band on the router, or a temporary 2.4 GHz SSID, is the usual fix when pairing fails and the boiler wiring is already correct.

What does Boiler Plus require in England?

From 6 April 2018, a new gas boiler in an existing English home needs time and temperature control plus automation or optimisation. That is a legal pattern for the install, not a badge on an amazon.co.uk box. Voice control or Alexa on the listing does not prove compliance by itself.

When is a thermostat socket the right product?

Use a plug-in thermostat socket for a greenhouse heater, reptile mat, fan or temporary cooler. It switches one appliance through a probe. It does not fire a gas boiler. Plan around a 13 A BS 1363 limit even when a bullet claims 16 A, and keep the probe in the air you want to control.

How do Danfoss RA and M30 heads differ?

Danfoss RA click and RAS liquid heads mount on Danfoss valve bodies. An M30×1.5 head fits many other TRV bodies when the thread matches. Read the old head before you order. A radiator head does not replace a wall stat on the boiler side.

Does a smart radiator valve start the boiler on its own?

A smart TRV can close one radiator, but the boiler still needs a room stat, programmer or brand gateway that is allowed to demand heat. Several listings in the smart radiator valve comparison need Hive Hub, Bridge X or a Zigbee coordinator in the house. A head alone is not a full heating system.

Electric or water: which underfloor thermostat fits?

Electric mats need a stat that can carry the load and use a floor sensor so the surface cannot overrun. Water underfloor needs an actuator or wiring-centre call. Meross MTS205 and MTS215 rows in the comparison are electric-only. Match the heat source on the listing before you trust a schedule.