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Grant VortexBlue External Boiler

The award winning Grant VortexBlue External Boiler range is endorsed by the Energy Saving Trust and comes with up to a 10 year guarantee

The Grant VortexBlue External Boiler combines the latest condensing boiler technology with Grant’s revolutionary new blue flame, this winning combination allows you to benefit from a market-leading reliable boiler with those all-important low emissions as well as up to a 10 year guarantee.

  • HVO compatible
  • Outputs of 21, 26 and 36kW
  • 90.7- 93.3% Gross SAP2009 annual efficiency
  • 10 year guarantee when installed by a G1 accredited installer such as Total Energy Services (T&C’s apply)
  • Market-leading Riello Blue Flame burner
  • Familiar burner technology
  • Neon diagnostic indicators
  • Compliant with September 2018 low NOx legislation

The Grant VortexBlue internal sleek white casing, unique control panel with neon diagnostic indicators and simplified pipework arrangement, makes this the ideal boiler for your utility or kitchen.


HVO Compatible – what does it mean?

The breakthrough came in 2020, during the testing and field trailing of boilers successfully using a 100% biofuel known as Hydrotreated Vegetable Oil (HVO). HVO feedstocks are generally used oils that contain rapeseed oil, sunflower oil, soybean oil and non-food oils such as jatropha oil and algae oil as well as waste animal fats. Waste and residue oils are now a substantial contributor to the feedstock which makes this biofuel even more sustainable.

When a homeowner chooses a new Grant condensing boiler, they will be futureproofing their home because all Grant boilers are compatible for use with HVO. When HVO supplies becomes available to a property, only a few minor modifications need to be made to the boiler, swapping it from kerosene oil to HVO. These modifications include adapting the size of the fuel injector nozzle, fuel pump pressure and blast tube, all of which can be carried out by the service engineer during an annual service, making life simple for homeowners and for heating engineers. Older Grant condensing boilers may also be adapted to HVO but this may require a new biofuel burner that is matched with the specific boiler. Again, this can be carried out by a service technician during an annual service.

Contact us for a free Grant UK Oil Boiler Quote


Total Energy Services cover the following areas;

Total Energy Services offer heating and plumbing services in the areas of Dorset, Somerset, Wiltshire and Hampshire including;

Blandford Forum, Sturminster Newton, Shaftesbury, Gillingham, Wimborne, Sherborne, Cerne Abbas, Six Penny Handley, Wincanton, Portland, Weymouth, Tisbury, Swanage, Wareham, Templecombe, Dorchester, Salisbury, Fordingbridge, Bruton, Castle Cary, Poole, Bournemouth, Christchurch.

If you live outside these areas please contact us and we will be happy to advise you.