Baxi is one of the oldest boiler brands in the UK, with a manufacturing history stretching back over a century. The Baxi 600, 800, and Platinum ranges are all regularly installed in London properties, and the brand is particularly well regarded among engineers for its ease of commissioning and competitive pricing. This review assesses the Baxi range for London homeowners and landlords considering a new boiler installation in 2026.
The Baxi Range in 2026
Baxi produces three main combi boiler ranges for the residential UK market: the Baxi 600 as the entry-level option, the Baxi 800 as the mid-range model with enhanced features, and the Baxi Platinum as the premium option with extended warranty and higher build specification. All three ranges are ErP A-rated for efficiency and meet the requirements of the Boiler Plus regulations that apply to new installations in London. Baxi also produces the Assure system and heat-only boilers for properties requiring a cylinder-based hot water system.
The Baxi 800 is the model most frequently specified for London residential installations by engineers who work with Baxi regularly. It offers outputs from 28 kW to 40 kW for combi variants, covering the majority of London terrace, semi-detached, and flat installations. The 800 range includes the Baxi Eye flue gas heat recovery option that captures waste heat from the flue gases and uses it to pre-heat the incoming cold water before it enters the main heat exchanger, improving real-world efficiency by several percentage points. For London homeowners focused on reducing gas bills, this feature provides a tangible return on the small additional cost of the Eye system.
Performance in London Conditions
Baxi boilers perform adequately in London hard water conditions, though like all combi boilers they benefit from the installation of a magnetic filter and a limescale inhibitor system at the time of commissioning. The Baxi 800 includes a built-in scale reducer as standard in some configurations, which is a useful feature for London installations without a whole-house water softener. The boiler also includes a frost protection mode that activates the pump and ignition automatically if the internal temperature drops to a level that risks freezing, which is relevant for London properties that are left unoccupied in cold weather.
The Baxi Platinum is positioned as the premium Baxi option and offers stainless steel heat exchangers, a more sophisticated control interface, and an extended manufacturer warranty of up to ten years. For London homeowners who are purchasing what they intend to be their long-term boiler and want the maximum warranty protection available, the Platinum range warrants consideration alongside Worcester Bosch and Vaillant premium options. The Baxi Platinum 33 is a popular specification in London for three-bedroom houses with a family-sized hot water demand.
Warranty and Servicing
Baxi offers a standard two-year warranty on the 600 range and three years on the 800 range, extending to five years with Baxi Registered Installer installation and registration. The Platinum range offers up to ten years warranty when installed and registered by a Baxi Elite Installer with annual servicing maintained throughout. Baxi parts are well distributed across London and most faults can be resolved quickly by a competent heating engineer. Prestige Engineers are Baxi registered installers and carry out Baxi boiler installations and servicing throughout Greater London.