Cabinet Height


Cabinet Width


Cabinet Depth


Complete hassle-free home comfort from a single compact appliance.

Offering first-class comfort in a compact, wall-hung appliance small enough to fit inside a standard kitchen cupboard†, the Keston Combi C30 enables heating and hot water to be controlled independently, ensuring maximum comfort and efficiency.

The Keston Combi C30 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, with weather compensation and a 7 year warranty***, the Combi C30 provides excellent energy savings, making it the perfect choice for new or replacement installations alike.

†Please check cupboard size prior to installation 


  • 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 solvent weld flue allowing simple, cost effective installations**
  • Weather compensator supplied as standard
  • Pre-fitted filling loop
  • Inbuilt frost protection
  • Fully modulating
  • On board diagnostics
  • Automatic bypass
  • 7 year warranty***
  • Boiler Plus compliant out of the box

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

** 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. 7 year warranty available until 31/12/18. Terms and conditions apply.