10 Best Pool Heaters 2025 in the UK

The Lay-Z-Spa Heater Pump Unit with Freeze Shield Technology is designed for use with Lay-Z-Spa AirJet models, making it a versatile choice for those who own these specific spa systems. A key strength of this unit is its compatibility with both current and older models, ensuring it can be a valuable upgrade for many users.

The Freeze Shield technology is especially notable, providing protection and functionality throughout the year, even in colder climates, which is an excellent feature for those living in areas with harsh winters. It also powers the Lay-Z-Spa Massage System, enhancing the spa experience with relaxing massages, and includes a timer function for automated heating, adding convenience to its use.

This unit would be beneficial for Lay-Z-Spa owners looking for year-round usage with added massage features.

The Lay-Z-Spa Hot Tub WiFi Enabled Airjet Plus Pump Pool Heater is designed for all AirJet models, offering convenience with WiFi enabling. This feature allows users to control the pump remotely, adding a layer of ease to its operation. The heater has a notable heating capacity and uses corded electric power, which tends to be straightforward to install and maintain but can be less energy-efficient compared to gas heaters.

The plastic material makes it lightweight at 12.5 kilograms, which is beneficial for easy handling and installation. However, plastic may not be as durable as metal alternatives in long-term use. The heater is suitable for various climates, making it versatile for different regions.

This pool heater is best for users seeking an easy-to-use, lightweight, and remotely controllable option for their AirJet models. However, those prioritizing long-term durability or lower operational costs might need to consider other options.

The Bestway Lay-Z-Spa Filter & Heating Heater Unit is designed for use with several spa models, including Miami, Palm Springs, Monaco, and Vegas. It's a versatile option for those looking to maintain the temperature of their inflatable hot tubs. Weighing 12 kg and measuring 45.01 x 45.01 x 65 cm, it is relatively compact and easy to handle during setup. This heater unit boasts a respectable customer rating of 4.1 out of 5 stars, indicating a generally positive reception from users.

One of the key strengths of this product is its compatibility with multiple spa models, which allows users flexibility if they own more than one type of Lay-Z-Spa. Installation and maintenance are made straightforward, given the product's design for layperson use. However, potential buyers should be aware of ongoing maintenance requirements such as filter cleaning and monitoring the heater's operation.

This heater unit seems best suited for casual spa users who prioritize ease of use and compatibility with existing Lay-Z-Spa models over high energy efficiency or performance in diverse climates.