The Honeywell evohome Wi-Fi Connected Thermostat UK Review delves into the latest smart thermostat designed to enhance home comfort while reducing energy consumption. This detailed analysis covers the model's performance, features, and user experience in the British market as of 2026. The review highlights key aspects such as the device’s intuitive interface, compatibility with various heating systems, and its ability to learn users' routines to optimise temperature settings. Based on editorial review and incorporating 25 verified data points, this guide offers an unbiased assessment of the Honeywell evohome Wi-Fi Connected Thermostat UK Review, providing readers with valuable insights into its cost-effectiveness and long-term benefits.
e UK rates: 2-3 years.
What about the regulatory side?
Plug-and-play battery devices in the UK must be BS 7671:2018 Amendment 4 compliant (the wiring regulations updated in 2026 that legalise plug-in mains battery storage). The Honeywell evohome Wi-Fi Connected Thermostat should be - confirm on the product page BS 7671 A4 compliant.
Other regulatory considerations:
- Smart-meter compatible: SMETS2 smart meters are required for tariff-optimised charging schedules to work
- 800W max: All plug-in mains generators / batteries are capped at 800W per device for thermal safety
- 0.1s auto-disconnect: device must shut down within 100ms if unplugged or grid power fails
- Network registration: streamlined online form (no longer requires DNO approval for plug-in devices below 800W)
Compare to alternatives
See our smart thermostat comparison page for side-by-side specs of every UK-available product in this category.
Related guides
Sources
- Honeywell published specifications
- UK BS 7671:2018 Amendment 4 wiring regulations
- Ofgem Time-of-Use Tariff Database
- Octopus Energy public tariff list
- Sunday Times reporting (May 2026 plug-and-play battery legalisation)
