Vortex Blue: Internal Combi

10 Year guarantee*

Vortex Blue: Internal Combi

The Grant VortexBlue Internal Combi combines Grant’s award-winning, patented stainless steel heat exchanger with the latest Riello RDB BLU compact burner.

The white cased models in the Grant VortexBlue Internal Combi boiler range feature large heat exchangers which have low water content and a larger surface area, greatly increasing the hot water performance. Each VortexBlue Combi is supplied with a 24ltr expansion vessel as standard and with front access, these boilers have been designed with the installer and servicing engineer in mind.

a Heating b Water

Features & benefits

  • *10 year guarantee when installed by a G1 Installer (Terms and Conditions apply)
  • Achieves highly efficient space heating efficiencies of 90.8%
  • Uses the latest Riello Blue Flame burner technology
  • All VortexBlue Internal Combi boilers feature two accurate electronic temperature controls which allow the boiler to operate in condensing mode on central heating whilst maintaining its instant hot water production
  • Excellent hot water performances across the range
  • 24ltr expansion vessel supplied with each boiler
  • Neon diagnostic indicators to help heating engineers with diagnostics
  • Compatible with Grant EZ-Fit flue systems
Stand out by becoming G1

Stand out by becoming G1

Installers who join the G1 Installer Scheme can access a range of benefits through this loyalty programme from Grant UK. G1 Installers can activate 10 year guarantees on all the VortexBlue oil-fired boilers (subject to Terms and Conditions), a guarantee period which will greatly appeal to homeowners when choosing their new boiler.

To learn more about the G1 Installer Scheme, please following the support link below to read about the requirements to join and other benefits available to G1 members.


Product code
Set Output
Max Output
NOx Emissions
Tappings Flow/Return
Energy Rating
Load Profile
Energy Label
Product Fiche
VTXBFCOMBI21 VortexBlue Combi 21 21kW 21kW 160kg 860mm 614mm 609mm 90.81 Class 3 22mm Riello RDB Blu a Heating b Water XL View View


EZ-Fit Flue Range

Grant UK supply a comprehensive range of flue systems to suit all Grant Vortex and VortexBlue oil-fired boiler ranges

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