Best Thermostats & Heating Controls — WiFi (2026)

Pros

• Controls boiler heating and hot water from the app
• Works with Alexa, Siri and Google Assistant
• Geofencing and open-window detection help cut bills

Cons

• Subscription needed to unlock some advanced features
• DIY install requires access to the boiler wiring

Pros

• Dual zone control for separate heating and hot water schedules
• Works with Amazon Alexa, Google Home and IFTTT
• Expandable with room thermostats and smart radiator valves

Cons

• App can be fiddly to set up multi-zone schedules initially

Pros

• Voice control via Alexa, Google Assistant and Apple HomeKit
• Auto-adapt algorithm learns your home heating pattern
• Sleek minimal design with a companion smartphone app

Cons

• Compatible with individual boiler systems only, not underfloor loops

Pros

• ENERGY STAR certified for lower running costs
• Works with Google Assistant and Amazon Alexa
• Simple app-based scheduling and remote control

Cons

• Fewer boiler-specific hot water controls than UK-focused rivals