Kernow Boilers provide a range of high quality services across Cornwall to both commercial and domestic customers.

Our services include the following:

  • Domestic and light commercial oil, gas and LPG central heating & hot water
  • Boiler and hot water cylinder replacements
  • Unvented hot water cylinders
  • Full new and replacement installations
  • Partial system updates
  • Powerflush

Standard 24kw Combi Boiler Swap and power flush £1299 + VAT

GLOW-WORM ULTACOM2 24CXI  combi boiler with horizontal flue (exiting through the wall not the roof) supplied and fitted.  LPG or Natural Gas

A 24kw boiler is normally sutible for a flat or 2/3bedroom house with one bathroom.

We will remove and dispose of your existing boiler. Connect up your new boiler to existing supplies already in place. On completion you will be issued with a Gas Safe installation certificate. This will be then notified to your Local Authority Building Control by gas safe. This certificate is essential if you intend to sell your property in the near future. Our engineer will contact you to book a convenient appointment date and time to install the new combi boiler. The installation normally takes approximately 1-2 days to complete. This includes any making good required when removing your old boiler. The price stated is for a standard boiler exchange and existing radiator clean with power flush machine. It does not include any additional work required if you wish to have the new boiler installed in a new location in the house or should the existing pipework not meet British Standard requirements.

The price is for a standard installation, which covers a basic exchange of your existing boiler with horizontal flue for a new combi glow-worm ULTRACOM2 24CXI with cleaning of existing radiator system with power flush machine. The boiler will be installed in the old boiler site. Should you require the boiler to be moved to a new siting, please contact our engineer for a free quote, or inspection. As set out in the above any additional pipework will be deemed as an extra and will be chargeable. No additional works will be carried out without the prior consent of the client with fixed written quote.

Boiler Data

British manufactured.  80,000BTU 24KW Condensing Combi boiler. Complete with flue and clock Key Features > 715mmH x 450mmW x 334mmD •SEDBUK A •NOx Class 5 •Advanced Diagnostics •LPG compatible •Up to 9.8L/min from the stainless steel heat exchanger •5 second hot water delivery* •Back-lit digital display •Eco setting •Inbuilt 2-stage frost protection •Anti-seizure controls •Inbuilt bypass •Inbuilt filling loop •Pullout Electrical Connections •Bottom cover plate •Continua electronics


Qualified and registered to work on unvented hot water cylinders and oil/gas appliances.

  • £2,000,000 Public Liability Insurance
  • Warranty Insurance
  • Deposit Insurance