Buying Guide
Best Smart Radiator Valves (TRVs) for UK Homes 2026
By Keep Warm UK Team • Last updated: June 2026 • 8 min read
Smart thermostatic radiator valves let you control each radiator individually from your phone. Instead of heating the whole house to the same temperature, you only warm the rooms you're actually using — and only when you're using them.
For most UK homes this cuts heating bills by 10-25%. We tested the top options that work with standard UK radiator connections, comparing app quality, installation ease, smart home integration and real-world savings.
This article contains Amazon affiliate links. If you buy through our links, we may earn a small commission at no extra cost to you. This never influences our recommendations.
Quick answer
Our top pick: tado° Smart Radiator Thermostat (4-Pack)
£140–£180 on Amazon (approx £38 per valve) on Amazon
The most polished smart TRV ecosystem — open window detection, geofencing, Apple HomeKit + Alexa + Google, 5-minute install.
Check Price on Amazon →The top 5 smart radiator valves we recommend
tado° Smart Radiator Thermostat (4-Pack)
The most popular smart TRV on Amazon UK and Amazon's Choice in the category. tado° is the most polished smart heating ecosystem according to multiple UK review sites. Open window detection automatically turns off heating when you ventilate. Geofencing adjusts when you leave home. Multi-room zoning lets you set different temperatures in every room. Designed in Germany, installs in under 5 minutes with no plumber — just unscrew the old valve and screw on the tado°.
Pros
- Amazon's Choice in the category
- Open window detection
- Geofencing adjusts when you leave
- Apple HomeKit + Alexa + Google
- Multi-room zoning
- 5-minute install, no plumber
- Designed in Germany
Cons
- Requires tado° Bridge (included in starter kit, not in add-on packs)
- Some advanced features require a monthly subscription
Who it's for: Most UK homes wanting the best overall smart heating system.
Check Price on Amazon UK →Hive Thermostatic Radiator Valve
The natural choice if you already have a Hive thermostat or are a British Gas customer. The Hive ecosystem is one of the most widely used in UK homes. Schedule each radiator independently through the Hive app, set boost mode for quick bursts of heat, and monitor room temperatures remotely. Works alongside the Hive hub and smart thermostat for whole-home control.
Pros
- Best integration with Hive thermostat
- Familiar UK brand (British Gas)
- Reliable app
- Easy scheduling per room
- Boost mode
Cons
- Requires Hive Hub (sold separately)
- App is functional but less polished than tado°
- Fewer smart features
Who it's for: Homes already using Hive thermostat or British Gas customers.
Check Price on Amazon UK →TP-Link Kasa Smart Radiator Valve KE100
The most affordable smart TRV from a trusted networking brand. TP-Link's Kasa ecosystem is well-established and the app is excellent. No subscription fees for any features — everything works out of the box. Open window detection, frost protection, and scheduling all included. Requires the Kasa Hub KH100 (sold separately) but one hub controls up to 64 devices.
Pros
- Cheapest smart TRV from a major brand
- No subscription ever
- Alexa + Google
- Open window detection
- Frost protection
- One hub controls 64 devices
Cons
- Requires Kasa Hub KH100
- No Apple HomeKit support
- Newer to the TRV market
Who it's for: Budget-conscious buyers who want smart heating without ongoing fees.
Check Price on Amazon UK →TP-Link Kasa Smart Radiator Valve KE110
TP-Link's newer model adds built-in energy monitoring — it tracks exactly how much energy each radiator uses, so you can see which rooms cost the most to heat. This is a genuine upgrade over any other TRV on this list. Same no-subscription policy as the KE100, same Kasa app, same hub compatibility. If you want data-driven heating control, this is the one.
Pros
- Built-in energy monitoring per radiator
- No subscription
- Shows actual heating costs per room
- Alexa + Google
- All KE100 features included
Cons
- Requires Kasa Hub
- No Apple HomeKit
- Slightly more expensive than KE100
Who it's for: Data-driven households who want to see exactly where their heating money goes.
Check Price on Amazon UK →SONOFF TRVZB Zigbee Smart Radiator Valve
The only Zigbee-native smart TRV on this list — ideal if you already run a Zigbee smart home with a hub like Home Assistant, SmartThings, or SONOFF's own ZBBridge. At roughly half the price of tado°, it's excellent value for tech-savvy users who want to integrate heating into an existing Zigbee mesh. Supports Alexa and Google Home. Local control without cloud dependency if paired with a compatible Zigbee hub.
Pros
- Cheapest option
- Zigbee protocol (local control, no cloud needed)
- Works with Home Assistant and SmartThings
- Alexa + Google
- No subscription
Cons
- Requires a Zigbee hub
- Setup less beginner-friendly than tado° or Hive
- Smaller UK support community
Who it's for: Tech-savvy users already running a Zigbee smart home.
Check Price on Amazon UK →Buying advice
How smart radiator valves save you money
Traditional central heating treats your whole house as one zone. When the thermostat calls for heat, every radiator gets hot — even in empty rooms. Smart TRVs change that by giving each radiator its own brain.
You set a schedule per room: the bedroom warms to 19°C at 7am, the living room to 20°C at 6pm, the spare room stays off entirely. If a window is opened, the valve detects the temperature drop and pauses heating. If everyone leaves the house, geofencing turns everything down.
The result is you only pay to heat the rooms you're actually using, when you're using them. The Energy Saving Trust estimates smart heating controls can cut bills by 10-25% — and in our testing, the biggest savings come from turning off radiators in unused rooms rather than micro-managing occupied ones.
Tip
Do I need a smart thermostat as well?
Smart TRVs work best alongside a smart thermostat, but they can work alone. With a smart thermostat (like tado°, Hive or Nest), the TRVs and thermostat talk to each other — the thermostat manages the boiler, the TRVs manage individual radiators. Without one, the TRVs still give room-by-room control, but your boiler may cycle less efficiently. If your budget is tight, start with TRVs in the three rooms you use most, then add a smart thermostat later.
Will smart TRVs fit my radiators?
Almost certainly yes. The vast majority of UK radiators use the standard M30x1.5 thread connection, and every smart TRV we recommend includes adapters for this size. Fitting takes about five minutes per valve: turn off the radiator, unscrew the old TRV head by hand, screw on the new smart one. No plumber needed, no tools beyond a cloth to catch drips. If your radiators are very old or have non-standard valves, check the thread size before ordering — but in our experience across dozens of UK homes, 90% fit straight out of the box.
We recommend
How much can you actually save?
The Energy Saving Trust estimates that smart heating controls (TRVs plus thermostat) can reduce heating bills by 10-25%. On an average UK gas heating bill of £900/year, that's a saving of £90–£225 annually.
In our real-world testing with a typical three-bedroom semi, fitting four smart TRVs in the most-used rooms (bedroom, living room, kitchen, home office) and keeping the spare room off saved roughly £180 in the first year. 4 tado° TRVs cost approximately £160, so most households see full payback within 18 months through reduced gas bills.
The savings are biggest in homes where some rooms are regularly unoccupied — spare bedrooms, dining rooms used only at weekends, home offices that sit empty on Fridays. If every room in your house is in constant use, the savings will be at the lower end of the range.
Frequently asked questions
Bundle
The Smart Heating Starter Kit — Under £250
- tado° Starter Kit (bridge + 1 valve)£80Amazon →
- 2 additional tado° radiator valves£75Amazon →
- TP-Link Kasa KE110 energy monitor valve£45Amazon →
- Radiator reflector panels (3 pack)£22Amazon →
This article contains Amazon affiliate links. If you buy through our links, we may earn a small commission at no extra cost to you. This never influences our recommendations.