Best Smart TRVs UK 2026: Room-by-Room Heating Control

Why Smart TRVs Save More Than You Think

Here's how most UK homes work: the boiler fires up, and every radiator in the house heats to the same temperature. The spare bedroom nobody's in. The guest bathroom. The dining room you use twice a week. All heated to the same level, all day, every day.

That's a colossal waste of energy. Smart TRVs fix it by letting you set different temperatures for every room and schedule each one independently. Bedrooms warm up at 10pm and cool down when you leave in the morning. The home office heats only on weekdays. Spare rooms stay at 14°C instead of 21°C.

The typical saving is 15–25% on heating bills. For an average UK household spending £800–1,000 a year on gas, that's £120–250 back in your pocket. With a heat pump, this matters even more. Every unnecessary degree of heating directly increases your electricity consumption. Heat pumps are most efficient when they're not working harder than they need to, and TRVs make sure that's the case.

The payback on a set of 4–5 TRVs? Typically 1.5–3 years, depending on your house size and how wasteful your current heating is. After that, it's pure savings.

The Ecosystem Problem (Read This Before You Buy Anything)

This is the single most important thing to understand about smart TRVs, and it trips up more people than anything else: smart TRVs are not standalone devices. They need a hub or thermostat from the same brand to work. You're buying into a system, not just a valve.

• tado° TRVs → need a tado° Smart Thermostat or tado° Internet Bridge
• Drayton Wiser TRVs → need a Wiser Hub (comes with the thermostat kit)
• Hive TRVs → need a Hive Hub (comes with Hive Active Heating)
• Honeywell Evohome TRVs → need an Evohome Controller (sold separately, ~£200–250)
• Aqara E1 TRVs → need an Aqara Hub or Apple HomeKit setup
• Meross TRVs → need a Meross Hub (included in the starter kit)

If you already have a smart thermostat, buy TRVs from the same brand. If you're starting from scratch, read our thermostat guide first; the thermostat is the brain of the system, and the TRVs are the muscle.

Don't buy tado° TRVs hoping they'll work with your Hive thermostat. They won't. Don't buy Wiser TRVs expecting them to talk to your Nest. They can't. Meross is the most flexible here (it works with HomeKit, Alexa, Google, and SmartThings), but you still need the Meross Hub to connect the TRVs.

Our Picks: 6 Smart TRVs Compared

Best Overall: tado° Smart Radiator Thermostat

Price: £50–70 per valve | Ecosystem: tado° | Battery life: ~2 years (2x AA)

The tado° is the smart TRV that everyone else is measured against, and for good reason. The app is the best in the business: clean, fast, genuinely pleasant to use. Per-room scheduling is intuitive: drag time blocks around a calendar, set target temperatures, done. Open window detection automatically drops the heating when it senses a sudden temperature fall (saves you from heating the street when you air out a room). Geofencing uses your phone's location to turn heating down when everyone's out and back up when you're heading home.

Installation is dead simple. Unscrew your old TRV head (it's hand-tight, no tools needed) and screw the tado° on in its place. The box includes adapters for all common UK valve bodies. Ten minutes per radiator, and you're not touching any water or pipes.

The catch? Two things. First, you need a tado° thermostat or Internet Bridge (£100–150 for the starter kit). Second, tado° charges £3/month for "Auto-Assist", which is geofencing and open window detection working automatically rather than sending you a notification to do it manually. It's annoying. The core scheduling and per-room control work without the subscription, but you'll want Auto-Assist eventually, and paying monthly for a feature that should be free is a legitimate gripe.

That said, if you're willing to live with the subscription (or just ignore the automatic features and tap notifications instead), the tado° TRV is the most refined, most reliable smart valve you can buy.

Pros:

• Best app and user experience of any smart TRV
• Open window detection and geofencing
• Wide compatibility with UK radiator valve bodies
• Reliable, accurate temperature control

Cons:

• Most expensive per valve
• Needs tado° ecosystem (thermostat or bridge)
• £3/month subscription for Auto-Assist features

Best Value: Drayton Wiser Smart TRV

Price: £35–45 per valve | Ecosystem: Drayton Wiser | Battery life: ~2 years (2x AA)

The Wiser is the TRV I'd recommend to most people, and the reason is simple: it's significantly cheaper per valve than tado° and there's no subscription fee, ever. When you're buying 5–8 valves for a whole house, that price difference adds up fast. You could save £100+ versus kitting out the same house with tado°.

Per-room scheduling works exactly as you'd expect. Set different temperatures for different times of day in every room. Boost mode bumps a room up by a couple of degrees for an hour when you want extra warmth. Away mode drops everything to a setback temperature when the house is empty. The Wiser app isn't quite as polished as tado° (it's functional rather than beautiful), but it does everything you need without fuss.

Drayton is a well-known UK heating brand (they've been making TRVs and thermostats for decades), and the Wiser hub integrates properly with your boiler rather than just controlling TRV heads. That means it can turn the boiler on and off intelligently, not just open and close valves.

The one thing Wiser lacks compared to tado° is on-valve open window detection. The system can detect open windows through the hub's temperature data, but it's not as instant or responsive as tado°'s per-valve detection. For most people, that's not a dealbreaker.

Pros:

• Cheapest per valve from a major UK brand
• No subscription fees: everything works out of the box
• Good multi-room scheduling and boost mode
• Established UK brand with proper boiler integration

Cons:

• App is less polished than tado°
• Needs Wiser hub/thermostat kit
• No on-valve open window detection

Best Budget: Meross Smart TRV Starter Kit

Price: £50 (hub + 1 TRV + 6 adapters) | Ecosystem: Meross (WiFi hub) | Battery life: ~1.5 years (2x AA)

The Meross Starter Kit is the cheapest way into smart heating on this list. For £50 you get the Meross Hub, one smart TRV, and six adapters to fit most UK radiator valves. Additional TRVs cost around £40 each, and the hub supports up to 16 devices, so there's room to grow.

What makes Meross stand out is compatibility. It's the only smart TRV here that works with Apple HomeKit, Amazon Alexa, Google Home, and Samsung SmartThings. If you've got a mixed smart home rather than being locked into one ecosystem, that flexibility is genuinely useful. The app supports 7-day scheduling, open-window detection, and multi-room control.

With 298 reviews at 4.0 stars, it's well proven. Reviewers consistently praise the easy installation (about 15 minutes per valve) and the HomeKit integration. The main complaints are about the app being less polished than tado° or Wiser, and occasional connectivity drops.

For a whole-house smart heating system with the slickest app, tado° or Wiser are still the picks. But if you want the cheapest entry point and the broadest smart home compatibility, Meross is hard to beat.

Pros:

• Cheapest starter kit (£50 for hub + 1 TRV)
• Works with HomeKit, Alexa, Google, and SmartThings
• Hub supports up to 16 devices
• Open-window detection
• 298 reviews, 4.0 stars

Cons:

• Hub required (included in starter kit, but add-on TRVs need it)
• Add-on TRVs ~£40 each (not the cheapest per-valve)
• App not as polished as tado° or Wiser

Best for Hive Users: Hive Radiator Valve

Price: £45–55 per valve | Ecosystem: Hive | Battery life: ~2 years (2x AA)

If you've already got Hive Active Heating (thermostat, hub, maybe some smart plugs or lights), adding Hive TRVs is a no-brainer. They slot straight into your existing ecosystem and show up in the same app you're already using. Per-room scheduling, boost mode, and the whole setup integrates with your Hive thermostat for proper boiler control.

Hive's big advantage is simplicity and support. The app is clean and easy, designed for people who aren't tech enthusiasts. And because Hive is backed by British Gas, you've got a major company behind the product: phone support, online help, even in-home installation if you want it. For non-techy households or anyone who just wants it to work without fiddling, that's genuinely valuable.

Open window detection works by spotting sudden temperature drops and adjusting accordingly. Scheduling is straightforward: set your times and temperatures per room, and the system handles the rest.

The reason Hive doesn't top the list: it's mid-price (more expensive than Wiser, similar to tado°) but the feature set sits below both. You don't get tado°'s geofencing polish or Wiser's value-for-money. It's a solid product, not a standout one, and that's fine if you're already in the Hive world.

Pros:

• Seamless integration with existing Hive ecosystem
• British Gas backing: good support for non-techy users
• Simple, clean app
• Open window detection

Cons:

• Mid-price without standout features
• Needs Hive Hub (comes with Active Heating kit)
• Fewer advanced features than tado° or Wiser

Best for Large Homes: Honeywell Evohome TRV

Price: £45–60 per valve | Ecosystem: Evohome | Battery life: ~2 years (2x AA)

The Evohome system has been around for years, and it shows, in a good way. This is the most mature, most battle-tested multi-zone heating system available. It supports up to 12 independent heating zones, which is more than any other system on this list. If you've got a large house with lots of rooms, or you want genuinely granular control across multiple floors, Evohome handles it without breaking a sweat.

It's also the system that professional heating engineers know best. If you ask an installer about smart zoning, there's a good chance they'll recommend Evohome; it's been the industry standard for multi-zone retrofit heating for years. The controller itself is a touchscreen unit that sits on a table or mounts on a wall, and it can operate independently of the app if your internet goes down.

The downsides are real, though. The controller is expensive: £200–250 just for the base unit, before you buy a single TRV. The app feels dated compared to tado° and Wiser. And the initial setup is more complex than the competition; it's designed with professional installation in mind, not necessarily DIY. If you're comfortable with tech, you can absolutely do it yourself, but expect to spend a Saturday on it rather than an hour.

For a 2-bed flat, Evohome is overkill. For a 5-bed detached with multiple heating zones and 10+ radiators to control, it's the right tool for the job.

Pros:

• Up to 12 independent zones: the most of any system
• Mature, reliable product with years of proven use
• Installer favourite: widely supported by heating engineers
• Works without internet via the touchscreen controller

Cons:

• Expensive controller (~£200–250) before buying TRVs
• Dated app interface
• More complex setup: better suited to professional installation

Best Looking: Aqara Radiator Thermostat E1

Price: £30–40 per valve | Ecosystem: Aqara / Apple HomeKit | Battery life: ~1.5 years (2x AA)

Let's be honest: most smart TRVs look like chunky plastic lumps stuck to the side of your radiator. The Aqara E1 is the exception. It's compact, minimal, and genuinely good-looking: closer to something you'd see in a Scandinavian design catalogue than a plumbing supplies website. If aesthetics matter to you (and in a visible room like a living room or kitchen, they probably do), the Aqara wins hands down.

It connects via Zigbee, which means you need either an Aqara Hub or an Apple HomeKit setup. If you're an Apple household (iPhones, HomePods, Apple TV), this integrates beautifully with your existing setup. You can control heating with Siri, set automations through the Home app, and it all just works within the Apple ecosystem.

Scheduling through the Aqara app is decent, and the valve itself is accurate and responsive. The price is competitive too: £30–40 per valve puts it in budget territory.

The limitation: if you're not in the Apple or Aqara ecosystem, the setup is less compelling. Without HomeKit, the scheduling options are more basic, and you'll need to buy an Aqara hub (£30–50) to get started. It's also a smaller brand in the UK than tado° or Wiser, so the community support and troubleshooting resources are thinner.

Pros:

• Best-looking smart TRV available: compact, minimal design
• Excellent Apple HomeKit integration
• Competitive pricing
• Zigbee connectivity (reliable, low power)

Cons:

• Needs Aqara hub or Apple HomeKit setup
• Limited scheduling without HomeKit
• Smaller brand: less UK support and community

Smart TRV Comparison Table

How Much Will You Actually Save?

The savings depend on two things: how many TRVs you install and how wasteful your current heating is. A draughty 4-bed detached where every room is heated to 21°C will save far more than a well-insulated 2-bed flat where you're already careful. Here's what to realistically expect:

• 2 TRVs (bedrooms only): £40–80/year saved. You're cutting heating in rooms that only need warmth at night
• 4 TRVs (bedrooms + spare rooms): £80–150/year saved. This is the sweet spot for most 3-bed homes
• 6+ TRVs (whole house): £120–200/year saved. Maximum control, every room on its own schedule

Most 3-bed homes need 4–5 TRVs. At £35–50 each (depending on brand), that's £140–250 total investment. Payback in 1.5–3 years. That's one of the fastest paybacks of any energy upgrade you can do: faster than loft insulation, faster than a new boiler, and far faster than solar panels.

With a heat pump, the savings are potentially even larger. Heat pumps run most efficiently at low flow temperatures, and every room you're overheating forces the system to work harder. Smart TRVs keep each room at exactly the right temperature, which means your heat pump runs at its optimal efficiency point more of the time.

Build Your System: What Will It Actually Cost?

A thermostat on its own is only part of the picture. Use the calculator below to see total cost, estimated savings, and payback for a complete system: thermostat plus TRVs.

What You Don't Need

Smart TRV manufacturers would love you to put one on every single radiator. You don't need to. Here's what to skip:

• Don't put a TRV on the radiator in the room with your thermostat. The thermostat controls the boiler based on that room's temperature. If you also put a TRV on that radiator, the two fight each other: the TRV closes the valve, the thermostat thinks the room is cold, the boiler keeps firing. It's a mess.
• Don't buy TRVs from a different brand to your thermostat hoping they'll be compatible. They won't. This is the number one mistake people make, and it's an expensive one to fix.
• You don't need TRVs in rooms you always heat. If your living room is heated every evening and you never want it cooler, a TRV there adds cost but not much value. TRVs save the most money in rooms you don't always use: spare bedrooms, dining rooms, home offices.
• Skip the expensive starter kits if you already have the thermostat. Starter kits bundle the hub/thermostat with a TRV or two. If you've already got the hub, just buy individual TRV add-ons; they're much cheaper.

Installation: Genuinely Easy DIY

This is one of the few smart home products that's genuinely DIY-friendly, and I mean genuinely: not "DIY-friendly if you're already comfortable with wiring and plumbing." Smart TRVs require zero plumbing, zero wiring, and zero tools in most cases.

Here's the process: unscrew your existing TRV head (it's hand-tight, just grip and twist anti-clockwise), screw on the smart TRV in its place, put batteries in, pair it in the app. Done. Ten minutes per radiator. You're not touching any water, pipes, or electrics. Nothing drains, nothing leaks.

The one exception: if your radiator has an old-style wheelhead valve (the manual type without a numbered dial, just a plain knob), you'll need an adapter. Most smart TRVs include adapters for the most common UK valve bodies in the box. The standard fitting is M30x1.5mm, which covers about 90% of UK radiators. Check your valve type before ordering, and if in doubt, the manufacturer's compatibility checker will tell you what adapter you need.

If your radiators don't have any TRV at all (just a manual on/off valve), you will need a plumber to fit a TRV valve body first. That's a quick job (about 30 minutes per radiator), but it does involve draining down the system.

Do Smart TRVs Work with Heat Pumps?

Yes, and they're arguably more important with a heat pump than with a gas boiler.

With a gas boiler, overheating a room wastes gas. With a heat pump, overheating a room wastes electricity, which is roughly 4x more expensive per kWh than gas. Every unnecessary degree you heat costs you more with a heat pump.

Smart TRVs solve this by making sure each room gets exactly the heat it needs and no more. The spare bedroom stays at 16°C instead of 21°C. The home office only heats on workdays. The bathroom warms up for an hour in the morning and evening. Your heat pump doesn't need to work as hard, its COP stays high, and your electricity bills stay low.

If your installer says the heat pump handles weather compensation on its own and you don't need TRVs, that's half right. Weather compensation adjusts the overall flow temperature based on outside conditions. TRVs adjust individual room temperatures based on occupancy and schedule. They're doing different jobs, and they work best together.

One important note: some smart thermostats designed for heat pumps (like Homely) have their own room sensor strategy and may not need traditional TRVs. Check your thermostat's capabilities before buying.

For most heat pump installations with standard radiators, though, smart TRVs are one of the best additions you can make.