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Vortex Blue: Internal

10 Year guarantee*

Vortex Blue: Internal

The Grant VortexBlue combines our proven condensing boiler technology with a revolutionary new blue flame.

Using a new state-of-the-art Riello Blue Flame compact burner alongside the familiar Vortex oil-fired boiler, this market-leading combination gives you an easy to install, reliable product with those all-important low emissions.

a Heating

Features & benefits

The Grant VortexBlue internal models combine our existing proven condensing boiler technology with the latest Riello RDB BLU compact burner.

The boilers feature a sleek white casing, unique control panel with neon diagnostic indicators and simplified pipework arrangement, making them the ideal choice for utility room installations.


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Sealed system

Sealed system versions are also available. These include a factory fitted expansion vessel, filling loop, pressure gauge, automatic air vent, pressure relief valve and high efficiency circulating pump, enabling boilers to be installed without the need for a feed and expansion tank in the loft

  • Award winning range
  • Outputs of 15-21, 21-26 and 26-36kW
  • 90.7 - 93.3% Gross SAP2009 annual efficiency
  • 10 year guarantee when installed by a G1 accredited installer (T&C’s apply)
  • Market-leading Riello Blue Flame burner
  • Familiar burner technology
  • Sleek white casing
  • Neon diagnostic indicators
  • Compliant with September 2018 low NOx legislation
Blue flame technology

Blue flame technology

Grant and Riello’s R&D have together successfully matched and field trialled this new range of innovative appliances. 

As the name suggests, the flame produced is blue in colour, rather than the usual yellow colour of the standard burners fitted in our current Grant Vortex range, which results in a much cleaner combustion process. All of the Grant VortexBlue boilers operate at the very high efficiency levels expected of the Grant Vortex condensing range and have the added benefit of producing extremely low NOx emissions.

From 26th September 2018, oil fired boilers installed in the UK will have to meet lower NOx emission targets. Furthermore, it is likely that even more stringent emission levels will be set in future years, so Grant have taken the decision to try and future proof oil fired appliances by moving to very low NOx, Blue Flame technology today.

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Product code
Set Output
Max Output
NOx Emissions
Energy Rating
Load Profile
Energy Label
Product Fiche
VTXBF21 Grant VortexBlue Internal 21 (15-21kW) 21kW 21kW 130kg 860mm 470mm 603mm 90.81 Class 3 a Heating - View View
VTXBF26 Grant VortexBlue Internal 26 (21-26kW) 26kW 26kW 130kg 860mm 470mm 603mm 91.71 Class 3 a Heating - View View
VTXBF36 Grant VortexBlue Internal 36 (26-36kW) 36kW 36kW 144kg 900mm 470mm 603mm 94.56 Class 3 a Heating - View View
VTXSBF21 Grant VortexBlue Internal System 21 (15-21kW) 21kW 21kW 130kg 860mm 470mm 603mm 90.81 Class 3 a Heating - View View
VTXSBF26 Grant VortexBlue Internal System 26 (21-26kW) 26kW 26kW 130kg 860 mm 470 mm 603mm 91.71 Class 3 a Heating - View View
VTXSBF36 Grant VortexBlue Internal System 36 (26-36kW) 36kW 36kW 144kg 900mm 470mm 603mm 94.56 Class 3 a Heating - View View



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