Vortex Pro: External Combi

Vortex Pro: External Combi

a Heating b Water

10 Year guarantee*

Grant Vortex Pro External Combi boilers have a durable casing designed for all weathers which encases the same features of the Pro Internal Combi models.

Comprising of three models, the Grant Vortex Pro External Combi oil boilers have larger than normal heat exchangers and deliver excellent hot water performances. Highly efficient and with built-in frost protection, the Grant Vortex Pro External Combi range is the perfect option when space is at a premium inside the home.


Features & benefits

  • *10 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 90.81 – 94.5%
  • High quality, external powder-coated casing and with built-in frost protection
  • Feature Grant’s patented stainless heat exchangers
  • Supplied with 24ltr expansion vessel
  • Factory fitted multi-directional flue to save installation time
  • Neon diagnostic indicators to allow for easy operation
  • This range is biofuel compatible (depending on the type of biofuel and % blend)
  • Heating engineers should visit the Professionals Vortex Pro External Combi range webpage to read more about these models

Awards & Accreditations


Case Studies

The importance of routine servicing

The importance of routine servicing

Regularly maintaining an oil boiler with routine servicing is beneficial in many ways. It is recommended that Grant oil boilers are serviced every twelve months to help prolong the lifespan of the product. In addition, servicing involves checking the system as well, ensuring that both the boiler and system are operating safely and efficiently.

To read more about how homeowners can take care of their Grant oil boiler, take a read of one of our blogs.


Product code
Set Output
Max Output
NOx Emissions
Energy Rating
Load Profile
Energy Label
Product Fiche
VTXOMCOMBI21 Vortex Pro External Combi 21 21kW 21kW 181kg 945mm 658mm 754mm 90.81 Class 2 a Heating b Water XL View View
VTXOMCOMBI26 Vortex Pro External Combi 26 26kW 26kW 206kg 945mm 658mm 754mm 91.71 Class 2 a Heating b Water XL View View
VTXOMCOMBI36 Vortex Pro External Combi 36 36kW 36kW 225kg 945mm 658mm 754mm 94.56 Class 2 a Heating b Water XL View View


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