10 Best Smart Thermostats 2025 in the UK

The New Hive Thermostat for Heating Control (Combi boilers) Nano 3 comes with some compelling features for those looking to enhance home heating efficiency. A standout is the OpenTherm feature, which ensures precise heat control, resulting in potentially significant gas savings and improved boiler longevity, great for both your wallet and the environment.

With its Wi-Fi connectivity through the Nano 3 Hub, it offers a seamless connection to your Hive devices, and the dual-core processor can efficiently handle a large network, making it ideal for tech-savvy users with multiple Hive products. The touch-based user interface combined with button controls makes it relatively easy to use, though those unfamiliar with smart devices might face a learning curve initially.

Energy-saving features like the ability to set six daily heating and hot water schedules, geolocation alerts, and Holiday Mode are practical for managing energy consumption, providing both comfort and savings when the home is unoccupied. Automatic frost protection adds peace of mind by safeguarding against potential cold-weather damage.

While integration with Hive products is strong, users heavily invested in other smart home ecosystems may find limited compatibility. As for installation, it's designed to be wall-mounted but could require professional assistance for those not comfortable with DIY tasks. In terms of aesthetics, the modern white design is unobtrusive and fits well in most home decors. This thermostat is a smart, efficient, and well-integrated heating solution.

The tado Wireless Smart Thermostat X Starter Kit is tailored for those seeking intelligent control over home heating, offering both wireless convenience and energy efficiency. It stands out for its ability to reduce heating costs through intelligent features like smart scheduling, geofencing, and open-window detection, which help optimize energy usage. This kit includes a bridge for connectivity and a stand, making it an attractive option exclusively for Amazon customers. It supports easy DIY installation, even without an internet connection, and is compatible with gas-fired boilers or heat pumps.

A major strength of this thermostat is its seamless integration into smart homes, working harmoniously with Amazon Alexa, Google Assistant, and Apple Siri for voice control. The user-friendly app ensures you can manage temperatures room-by-room, enhancing comfort while saving energy. The digital display offers intuitive use, making adjustments straightforward.

However, there are some limitations to consider. The thermostat is not compatible with previous versions like the tado V3+, which could be a setback for existing tado users. It's also crucial to note that this thermostat requires the Bridge X or another Thread border router, which might add to the initial setup if not already owned. The future-proof technology, with Matter and Thread ensuring stable connectivity, promises longevity in functionality. Additionally, the optional Auto-Assist package provides valuable insights into energy costs and potential heating solutions, but it comes at an extra cost. This product is ideal for those who want to modernize their home with a smart, efficient heating system but may not suit users of older tado systems or those seeking a non-battery-powered option.

The tado Smart Radiator Thermostat X - Trio Pack is a useful addition for anyone looking to save on heating costs and manage their home’s temperature more efficiently. Compatible with popular smart assistants like Alexa, Google Assistant, and Siri, it offers convenient control via an app or voice commands. One of its standout features is the energy-saving capability, claiming to reduce energy consumption by 22% on average. The thermostat also supports advanced geofencing and open-window detection, adding to its energy efficiency.

Users can benefit from customizable smart schedules and a touch display for easy operation. The installation is user-friendly with a DIY approach, and it includes adapters to fit various radiator valves, ensuring a secure fit. The rechargeable battery adds to the ease of use, eliminating frequent battery changes.

However, there are some limitations. The product is not compatible with tado° V3+ or older versions, which may be a drawback for existing tado° users considering upgrades. Additionally, to take full advantage of some features, such as Auto-Assist, there is a subscription fee. The thermostat requires a Bridge X or another Thread border router for optimal performance, which is not included in the package. Despite these limitations, the tado Smart Radiator Thermostat X is an excellent choice for those looking to modernize their heating control efficiently and conveniently.