Baxi Assure

At a glance

• Configurations: Combi, System, Regular
• Best suited to: A broad spread of domestic replacements
• Fuel: Mains natural gas (some variants are LPG-convertible, check the manufacturer’s data).

Specifications

Match the badge in front of you to a row before you use any of this. Every figure below was read from the Baxi literature listed under Sources at the foot of this page, checked 6 September 2026. Outputs, variants and part numbers change by year, so the appliance data plate is still the last word.

• Baxi's published GC numbers for Assure cover the 500 Combi 2. For the system and regular formats in the range, read the number off the plate rather than assuming from the Assure name.
• Register within 30 days of installation. Baxi limits the warranty to 12 months from the installation date on the Benchmark checklist where the registration, Benchmark and annual service conditions are not met.

Where the data plate is

Above the boiler controls on the Assure 500 Combi 2, with the boiler ID and serial also shown by the cable gland on the underside. The serial is the field marked s/n.

Worth knowing on site

• Covers combi, system and regular formats across the range.
• Warranty and features vary by model, check Baxi's current line-up.

On the tools

Assure runs alongside Baxi's numbered ranges as the brand's installer-focused line, rather than sitting directly above or below the 800 and 600 on a single ladder. Because it spans combi, system and regular, it is a broad, flexible choice across mixed workloads.

Variants and configuration

Covering combi, system and regular (heat-only) formats, Assure has one of the widest configuration spreads of any Baxi range covered here. Warranty and features vary by individual model, so check Baxi's current line-up and the data plate rather than assuming from the Assure name alone.

Where it sits in the range

Rather than sitting on the same ladder as the 800 and 600, Assure runs as a parallel range from Baxi aimed at giving fitters a broad spread of combi, system and regular options under one warranty and support offering.

Finding the manual and the data plate

For the exact outputs, gas rate, dimensions and commissioning figures, work from the appliance’s data plate and the manufacturer’s installation and servicing instructions. The GC (Gas Council) number and serial are on the data plate, usually behind the front panel or on the underside. Baxipublishes its manuals and support at Baxi support.