Vortex Blue: External Combi

10 Year guarantee*

Vortex Blue: External Combi

Pairing together the successful combination of Grant’s patented technologies alongside Riello’s RDB BLU blue flame burner, the Grant VortexBlue External Combi is ideal for installations where an outdoor solution is required.

Similar to the Grant Vortex Pro Combis, the Grant VortexBlue External Combi boilers have large heat exchangers and accurate electronic temperature controls. These features allow the boilers to greatly increase their hot water performances as well as maintaining instant hot water production during condensing model in central heating.

a Heating b Water

Features & benefits

  • *10 year guarantee when installed by a G1 Installer (Terms and Conditions apply)
  • Incredibly efficient with space heating efficiencies of 90.8 – 94.5%
  • Riello RDB BLU Blue Flame burner technology featured throughout the range
  • Features two accurate electronic temperature controls which allow the Grant VortexBlue External Combi boilers to operate in condensing mode on central heating whilst maintaining its instant hot water production
  • Every model achieves excellent hot water performances
  • 24ltr expansion vessel supplied as standard
  • Factory fitted multi-directional flue saving time with installation
  • Neon diagnostic indicators to help with diagnostics
The VortexAir Hybrid combines an oil boiler with an air source heat pump

Blue flame hybrid technologies

With its cleaner combustion processes, a Grant VortexBlue oil boiler is a greener alternative to standard oil-fired boilers. When customers want to take one more step towards a more sustainable heating system, a hybrid can sometimes be the answer. The Grant VortexAir combines a VortexBlue oil boiler with an Aerona³ air source heat pump, giving installers and their customers a renewable alternative to boiler replacement installations.

Read more about the Grant VortexAir Hybrid heating range here.


Product code
Set Output
Max Output
NOx Emissions
Tappings Flow/Return
Energy Rating
Load Profile
Energy Label
Product Fiche
VTXBFOMCOMB21 Grant VortexBlue External Combi 21 21kW 21kW 181kg 945mm 658mm 966mm 90.81 Class 3 22mm Riello RDB Blu a Heating b Water XL View View
VTXBFOMCOM26 Grant VortexBlue External Combi 26 26kW 26kW 206kg 945mm 658mm 966mm 91.71 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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