Vaillant

Vaillant ecoTEC plus

CombiSystemRegular

Vaillant's core range, available as combi, system and regular across a wide band of outputs.

At a glance

Configurations: Combi, System, Regular
Best suited to: Small through to large homes, depending on output
Fuel: Mains natural gas (some variants are LPG-convertible, check the manufacturer’s data).

Worth knowing on site

Combi outputs commonly span roughly 25kW to 38kW, with higher-output and system/regular options.
The range was remastered in the mid-2020s (model numbers such as 826/836 replacing 825/835).

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. Vaillantpublishes its manuals and support at Vaillant support.

Useful while you’re on the tools

Flue gas analysis explained →What is a CP12? →Flue gas ratio calculator →CP12 renewal checker →

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Manifold is not affiliated with or endorsed by Vaillant. Brand and model names are used only to help engineers find the right resources. Specifications and available variants change by year and model, so always work from the appliance’s data plate and the manufacturer’s own installation and servicing manual. Gas work must be carried out by an appropriately Gas Safe registered engineer.

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Finding the manual and the data plate