10 Best Tankless Water Heaters 2025 in the UK

The Stiebel Eltron DCE-X Premium Compact Instant Water Heater is a notable option for those seeking a compact and efficient tankless water heater, ideal for shower use. This model stands out with its emphasis on energy efficiency, thanks to its 4i technology and fully electronic closed-loop control, which ensures accurate temperature delivery and maximum energy efficiency. The inclusion of an ECO mode further enhances its energy-saving credentials, making it particularly attractive for users conscious of their energy consumption.

The unit's design is sleek and modern, with a large, backlit multifunction display that simplifies operation, making it user-friendly even for those not familiar with advanced electronics. The size and weight of the heater are within a reasonable range, with dimensions that suggest it should fit easily into smaller spaces, although installation might require professional assistance due to its electrical requirements.

Some potential drawbacks include the specific voltage requirements of 220-240V, which may limit its use in certain regions without the appropriate electrical infrastructure. The 10/12 kW power specification suggests a moderate flow rate, which should be considered for households with higher hot water demands or multiple simultaneous users. While it ranks decently in its category and has positive customer reviews, prospective buyers should consider the specifics of their water heating needs, particularly in terms of flow rate and installation capabilities, to ensure this model meets their requirements. It's a strong contender for those needing a reliable and efficient water heater for personal or small-scale use.

The CAMPLUX AY132P43 5L Portable Gas Water Heater is tailored for outdoor enthusiasts like campers and RV users, looking for a convenient way to access hot water on the go. Offering a flow rate of 5 liters per minute, it is suitable for outdoor showers and tasks such as washing horses or pets, providing a steady supply of hot water without the need for a storage tank.

One of its key strengths is the portability, weighing only 4.54 kg and equipped with a folding handle for easy transport. It also features multiple safety protections, including flame failure and overheat protection, ensuring secure usage outdoors. Energy efficiency is a highlight, as it uses propane gas only when hot water is needed, which can save on energy costs.

However, potential users should note that the heater requires a propane gas bottle and batteries to operate, which are not included in the purchase. The heater offers a temperature range from 10 to 65°C, which is adequate but may require manual adjustments to achieve desired settings. The included 4.3L water pump helps boost water pressure, a benefit in areas with low water supply pressure.

The compact size and wall-mounted installation make it practical for various outdoor setups, though users need to consider a suitable location for gas bottles and necessary safety clearances. While it’s a great option for temporary or mobile use, it may not be suitable for permanent installation or high-demand residential applications.

In conclusion, the CAMPLUX AY132P43 is a versatile and efficient choice for outdoor hot water needs, particularly for those who value portability and energy saving in their tankless water heater. It's best suited for activities like camping and RV travel, offering convenience and hot water access with minimal fuss.