What Makes a Smart Thermostat ‘Smart’?
Before diving into our list, let’s clarify what sets these devices apart from traditional thermostats. A smart thermostat connects to your home Wi-Fi, allowing you to control your heating remotely via a smartphone app. The best models learn your habits, adjust to your lifestyle, and help reduce energy consumption without you lifting a finger.
The Energy Saving Trust estimates that smart thermostats can save the average UK household between £95 and £145 annually on heating bills – nothing to sniff at with today’s energy prices!
Our Top Picks for 2025
1. Google Nest Learning Thermostat (4th Generation)
Price: £199
The latest iteration of the Nest Learning Thermostat remains the gold standard in smart heating control. The 4th generation model builds upon its predecessors’ strengths with enhanced learning capabilities and a sleeker design.
What we love:
- True learning capabilities that adapt to your schedule within a week
- Stunning circular glass display that doubles as an information hub
- Works with most UK boiler systems
- Integrates seamlessly with other Google smart home products
- ‘Eco mode’ automatically adjusts when you’re away
Not so great:
- Premium price point
- Professional installation recommended (adds around £75-100)
The Nest’s standout feature continues to be its learning algorithm. After just a week of manual adjustments, it creates a personalised schedule based on when you’re home and your temperature preferences. It’s like having a tiny heating butler who knows exactly when you’ll be walking through the door.
2. Hive Active Heating 3
Price: £179
British Gas’s Hive system has earned its place as one of the UK’s most popular smart thermostats, and the latest version doesn’t disappoint.
What we love:
- Excellent integration with other Hive products
- Intuitive app interface
- Holiday mode for extended absences
- Works with most voice assistants
- Geolocation features to heat your home as you approach
Not so great:
- Learning features not as advanced as Nest
- Requires Hive Hub (included in starter packs)
Hive’s strength lies in its simplicity and reliability. The geolocation feature is particularly useful – your heating can automatically switch on as you head home, ensuring you never return to a cold house again. For a deeper comparison between these two market leaders, check out our Hive vs Nest detailed breakdown.
3. Tado° Smart Thermostat V3+
Price: £169.99
Tado° has built a reputation as the energy efficiency champion, and their V3+ model reinforces this with impressive savings potential.
What we love:
- Outstanding energy-saving reports and suggestions
- Open window detection automatically reduces heating
- Weather adaptation adjusts based on forecast
- Clean, minimalist design
- Compatible with 95% of UK heating systems
Not so great:
- Some advanced features require a subscription
- Setup can be complex for some heating systems
Tado°’s weather adaptation technology is genuinely impressive – it factors in tomorrow’s forecast when deciding how to heat your home today. If warmer weather is coming, it won’t waste energy overheating your property.
4. Drayton Wiser Multi-Zone Kit
Price: £149.99 (starter kit), additional radiator thermostats £39.99 each
For homes needing zone-specific heating control, the Drayton Wiser system offers exceptional value and flexibility.
What we love:
- True multi-zone heating without breaking the bank
- Easy DIY installation
- Excellent UK-based customer support
- Smart schedules for each room
- Away mode detects when nobody’s home
Not so great:
- App design isn’t as polished as competitors
- Limited integration with some smart home ecosystems
The ability to control individual rooms is a game-changer for larger homes or properties with varying usage patterns. Why heat the spare bedroom when nobody’s using it? With the Wiser system, you can create specific heating zones without a complete system overhaul.
For more on transforming different areas of your home with smart technology, have a look at our guide to creating the perfect smart kitchen.
5. Honeywell Home Evohome
Price: £249.99 (base unit), plus radiator controllers (approx. £59 each)
The premium choice for ultimate heating control, Evohome allows independent management of up to 12 zones.
What we love:
- Unmatched zone control capabilities
- Intuitive touchscreen controller
- Works with underfloor heating systems
- Quick heat and economy modes
- Compatible with OpenTherm boilers for maximum efficiency
Not so great:
- Expensive initial outlay for multi-room setups
- More complex installation
Evohome represents the Rolls-Royce of smart heating. If you have a larger home with varied heating needs across different rooms, this investment could pay dividends in comfort and energy savings. The system’s ability to integrate with underfloor heating makes it particularly versatile.
6. Netatmo Smart Thermostat
Price: £149.99
Designed by Philippe Starck, the Netatmo combines French style with impressive functionality.
What we love:
- Striking, minimalist design
- No subscription fees
- Auto-Adapt feature considers home insulation and outdoor temperature
- Easy-to-replace batteries (2-year life)
- Detailed energy consumption reports
Not so great:
- Limited smart home integration compared to others
- Display not as information-rich as competitors
Netatmo’s Auto-Adapt feature is particularly clever, taking into account your home’s insulation level and outside temperature to optimise heating times. The transparent energy reports help you understand exactly where your money is going.
7. Salus IT500 Internet Thermostat
Price: £99.99
If you’re looking for smart functionality without breaking the bank, the Salus IT500 offers remarkable value.
What we love:
- Budget-friendly entry point to smart heating
- Simple, straightforward setup
- Weekly programming options
- Remote access via smartphone
- Compatible with most combi boilers
Not so great:
- Basic feature set compared to premium options
- Less intuitive app interface
- No learning capabilities
The Salus proves that smart heating control doesn’t have to cost a fortune. While it lacks the advanced learning features of pricier models, it delivers on the core promise: allowing you to control your heating remotely and set schedules to save energy.
Installation Considerations
Before purchasing, consider whether you’re comfortable with DIY installation or would prefer professional help. While some systems like the Salus and Tado° are designed for relatively straightforward DIY installation, others (particularly Nest and multi-zone systems) often benefit from professional setup.
Many manufacturers offer installation packages, or you can find certified smart home installers through services like Checkatrade.
For renters, look for systems that don’t require permanent modifications to your heating system. Our article on smart home upgrades for renters offers more guidance on this.
Smart Thermostat Features Worth Having
When comparing options, these features can make a significant difference to your experience:
Learning Capabilities
Systems that learn your habits and automatically adjust save you the hassle of programming.
Geofencing
This uses your phone’s location to determine whether you’re home, adjusting heating accordingly.
Weather Responsiveness
The best systems factor in weather forecasts to optimise heating efficiency.
Multiple Zone Control
Particularly useful for larger homes, allowing different temperatures in different rooms.
Energy Usage Reports
Detailed insights help you understand and optimise your consumption patterns.
Open Window Detection
Automatically reduces heating when a significant temperature drop suggests an open window.
Compatibility Matters
Before making your final decision, check compatibility with:
- Your boiler type (combi, conventional, system)
- Your existing heating system (radiators, underfloor heating)
- Other smart home ecosystems you use (Google Home, Amazon Alexa, Apple HomeKit)
- Your Wi-Fi setup (some older routers may have compatibility issues)
Most manufacturers offer compatibility checkers on their websites – it’s worth using these before purchase.
The Bottom Line: Which Smart Thermostat Is Right for You?
After testing numerous systems across my draughty Yorkshire cottage (and helping friends install various options in their homes), I’ve found that the ‘best’ smart thermostat depends entirely on your specific needs.
- For maximum intelligence and learning capability: The Google Nest Learning Thermostat remains unbeaten, though at a premium price.
- For multi-room control on a budget: The Drayton Wiser system offers the best value for zone control.
- For energy efficiency obsessives: Tado° provides the most detailed energy monitoring and suggestions.
- For simplicity and reliability: Hive continues to deliver a straightforward, dependable experience.
- For those on a tighter budget: The Salus IT500 gives you the core smart functionality without the frills.
Final Thoughts
Smart thermostats represent one of the few smart home investments that genuinely pay for themselves over time. Beyond the convenience of controlling your heating from your phone, the energy savings can be substantial – especially important as we head toward another winter of high energy costs.
In my experience, the initial adjustment period (where you might find yourself playing with your new toy a bit too much) gives way to a ‘set and forget’ relationship that’s the hallmark of truly effective smart home technology. Your heating simply works as needed, with minimal input required.
Whichever system you choose, you’re taking a positive step toward both comfort and efficiency – and that’s something we can all warm to.
Looking to expand your smart home beyond heating? Check out our guide to essential smart home devices for beginners to see what should be next on your list.
