Energy Savings Trust HVO
Vortex Pro: Internal Combi

5 Year guarantee*

Vortex Pro: Internal Combi

The Grant Vortex Pro Internal Combi boilers provide both heating and hot water for the home with four white cased models available.

Designed to increase hot water performance effectively and efficiently, the Vortex Pro Internal Combi oil boilers have a sleek white cased appearance and are quiet in operation, making them the ideal choice for utility room installations. The range includes the slimline Combi XS model which is perfectly suited when space is limited.

a Heating b Water

Features & benefits

  • *5 year guarantee when installed by a G1 Installer (Terms and Conditions apply)
  • Available in outputs of 21kW, 26kW and 36kW
  • Incredible space heating efficiencies of 91.7 – 94.5%
  • Includes the Vortex Pro Combi XS model, a compact 26kW boiler which can replace an older oil-fired combi as it is only 515mm wide
  • Features large heat exchangers with low water content and larger surface to vastly increase hot water performance
  • 24ltr expansion vessel supplied with all models
  • Neon diagnostic indicators allowing for user-friendly operation
  • Compatible with Grant EZ-Fit flue systems
  • As with all of Grant’s Vortex oil boilers, this range is biofuel compatible (depending on the type of biofuel and % blend)
  • Heating engineers should visit the Professionals Vortex Pro Internal Combi range webpage to read more about these models
What is a Combi boiler?

What is a Combi boiler?

A combi (or combination) boiler produces both heating and hot water from one compact appliance. No additional hot water cylinder is required, and the hot water produced by combis is sent to the taps at mains pressure, which makes combis an attractive proposition, especially when space is at a premium within the home. In addition, homeowners can normally save money and time on the installation of a combi boiler too, as there is less additional components to install.

Grant have internal and external combi models available in both the Vortex and VortexBlue ranges.


Product code
Set Output
Max Output
NOx Emissions
Energy Rating
Load Profile
Energy Label
Product Fiche
VTXCOMBI21 Grant Vortex Condensing Combi 21 21kW 21kW 160kg 860mm 614mm 606mm 90.81 Class 2 a Heating b Water XL View View
VTXCOMBI26 Grant Vortex Condensing Combi 26 26kW 26kW 177kg 860mm 614mm 606mm 91.71 Class 2 a Heating b Water XL View View
VTXCOMBI36 Grant Vortex Condensing Combi 36 36kW 36kW 200kg 900mm 614mm 606mm 94.56 Class 2 a Heating b Water XL View View
VTXXSCOMBI26 Grant Vortex Pro Combi XS 26 26kW 26kW 165kg 857mm 515mm 606mm 92.00 Class 2 a Heating b Water XL View View


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There is a lot of terminology in the world of heating so this section is here to provide you with the definitions and clarity.

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