Keston System S30 Boiler: Features & Benefits

Keston System S30 is ideal for a wide variety of domestic installations. Choose this system model to benefit from a boiler with high ErP efficiency rating, flexible 27m** twin flue capacity and a 7 year warranty†.

Combined with our Keston Twin Flue System, this system boiler has a twin flue capability of 27m**. This provides greater flexibility as the flue runs are no longer bound together and can therefore be installed almost anywhere in a building. System S30 is a dependable, reliable and flexible home-heating solution.

Available with an optional LPG conversion kit, this 30kW system boiler is suitable for home heating systems that run on natural gas or propane. Thanks to its compact kitchen cupboard fit*, the lightweight design of Keston System S30 means it can be installed out of sight.

When paired with a hot water cylinder, this twin flue system boiler offers a complete central heating and hot water package for larger domestic properties. As an A-rated ErP model, you can rely on Keston System S30 to efficiently heat your home.

Book your S30 boiler installation with a registered Keston installer.

  • 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
  • Twin flue up to 27m**
  • 50mm muPVC (PVC-C) solvent weld flue allowing simple, cost effective installations***
  • Weather compensation supplied as standard
  • 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†
  • Uk Icon BRITISH BUILT SINCE 2013
  • 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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