Features & Benefits

Offering first-class comfort in a compact, wall-hung appliance small enough to fit inside a standard kitchen cupboard*, the Keston Combi range enables heating and hot water to be controlled independently, ensuring maximum comfort and efficiency.

Keston Combi can be sited almost anywhere in the home, without the need for a separate tank. And because it connects to the unique Keston Twin Flue system, the boiler can be situated anywhere up to 27 metres** from the flue outlet, helping to provide further flexibility when required.

Fully modulating, and with weather compensation supplied as standard, the Keston Combi provides excellent energy savings, making it the perfect choice for new or replacement installations alike.

  • 7 year warranty†
  • Easy to see pressure gauge
  • Large backlit display with user friendly controls
  • Low lift weight
  • Low component count, maximising reliability
  • Compact dimensions
  • 50mm muPVC (PVC-C) solvent weld flue allowing simple, cost effective installations***
  • Weather compensator supplied as standard making Keston Combi Boiler Plus compliant out of the box
  • Pre-fitted filling loop
  • Inbuilt frost protection
  • Fully modulating
  • LPG conversion kit available

* Please check cupboard size prior to installation.

** For the maximum total equivalent flue length please refer to the installation manual.

*** The only systems approved for this application are: Marley muPVC (PVC-C) Solvent Weld Waste System (50mm), Polypipe System 2000 muPVC (PVC-C) Solvent Weld Waste System (50mm), Polypipe Terrain Solvent Weld System (50mm) and Wavin Osma PVC-C Solvent Weld System (50mm). Please use the recommended Solvent Weld Cement for each system.

† 7 year warranty when installed with a Keston filter and registered within 30 days of installation. 5 year parts & labour warranty as standard. Terms and conditions apply; click here to read them.

Boiler images are for illustrative purposes only.

  • 7 Year Icon 7 YEAR WARRANTY†
  • Twin Flue Icon TWIN FLUE SYSTEM
  • Weather Comp Icon V2 WEATHER COMPENSATOR

Controls & accessories

  • Keston Rf Electronic Thermostat

    RF Electronic Programmable Room Thermostat

    This Radio Frequency (RF) digital timer provides heating and hot water control via a simple user interface.

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  • 2016 Mechanical Timer R 1

    Mechanical Timer

    Our 24 hour mechanical timer is a simple plug-in option. Continuous, timed or off modes can be set, providing 15 minute period operation.

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  • Keston Filter Website

    Keston 22mm System Filter

    The Keston 22mm System Filter is a magnetic filter for use with Keston Combi and System boilers. The compact design is easy to install and fits on horizontal or vertical pipework in both flow directions.

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