Vortex Pro: Internal

5 Year guarantee*

Vortex Pro: Internal

Grant Vortex Pro Internal models are designed to suit kitchens and utility rooms, delivering both choice and performance across the range.

The Vortex Pro Internal range is incredibly efficient, combining the latest Riello burner technology with Grant’s trusted, patented technologies. The models available within range are ideal for direct boiler replacements of older oil-fired models.

a Heating

Features & benefits

  • *5 year guarantee when installed by a G1 Installer (Terms and Conditions apply)
  • Available in outputs from 15kW up to 70kW
  • Sealed system models also available in outputs from 15kW to up 46kW
  • Incredible space heating efficiencies of 90.0 – 94.5%
  • Quiet operation
  • Designed to be installer-friendly and straightforward to service
  • 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 range webpage to read more about these models
Introducing Grant’s patented heating technologies

Introducing Grant’s patented heating technologies

Unlike traditional oil-fired boilers, the Vortex and VortexBlue condensing boiler has a built-in stainless-steel heat exchanger incorporating Grant’s unique turbulator baffle system which cools the gases to a point where the latent heat, normally lost to the atmosphere through the flue, can be usefully extracted. The additional energy recovered enables the boiler to operate continuously at much higher efficiency levels, resulting in lower heating and hot water running costs.

Discover the complete Grant oil boiler range here.


Product code
Set Output
Max Output
NOx Emissions
Energy Rating
Load Profile
Energy Label
Product Fiche
VTX15/21 Vortex Pro Utility 15-21 21kW 21kW 97kg 855mm 348mm 566mm 90.81 Class 2 a Heating - View View
VTX15/26 Vortex Pro Utility 15-26 21kW 26kW 130kg 860mm 470mm 603mm 91.71 Class 2 a Heating - View View
VTX26/36 Vortex Pro Utility 26-36 31kW 36kW 144kg 900mm 470mm 603mm 94.56 Class 2 a Heating - View View
VTX36/46 Vortex Pro Utility 36-46 41kW 46kW 144kg 900mm 470mm 603mm 90.00 Class 2 a Heating - View View
VTX46/58 Vortex Pro Utility 46-58 52kW 58kW 268kg 1234mm 563mm 786mm 91.94 Class 2 a Heating - View View
VTX58/70 Vortex Pro Utility 58-70 64kW 70kW 282kg 1234mm 563mm 786mm 91.61 Class 3 a Heating - View View
VTXS15/26 Vortex Pro Utility System 15-26 21kW 26kW 138kg 860mm 470mm 603mm 91.71 Class 2 a Heating - View View
VTXS26/36 Vortex Pro Utility System 26-36 31kW 36kW 167kg 900mm 470mm 603mm 94.56 Class 2 a Heating - View View
VTXS36/46 Vortex Pro Utility System 36-46 41kW 46kW 168kg 900mm 470mm 603mm 90.00 Class 2 a Heating - View View


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