Vortex Blue: External Combi

10 Year guarantee*

Vortex Blue: External Combi

The Grant VortexBlue External Combi teams together Grant’s patented technologies with Riello’s ultra-low NOx burner to deliver heating and hot water efficiently and sustainably.

When an outdoor solution is needed for a new boiler, the Grant VortexBlue External Combi can be the answer with its high quality, external powder-coated casing and built-in frost protection. Designed for all weather conditions, these boilers achieve excellent efficiencies and hot water performance.

a Heating b Water

Features & benefits

  • *10 year guarantee when installed by a G1 Installer (Terms and Conditions apply)
  • Achieves excellent space heating efficiencies between 90.8 – 94.5%
  • Uses cleaner burning technology with the Riello blue flame burner, producing very low NOx emissions
  • Durable design with high quality external casing
  • All Grant VortexBlue External Combi boilers have large heat exchangers which have low water content and a larger surface area, vastly increasing the hot water performance
  • 24ltr expansion vessel and factory-fitted multi-directional flue supplied as standard
  • User-friendly operation with neon diagnostic indicators
  • Heating engineers should visit the Professionals VortexBlue External Combi range webpage to read more about these models
Going green with blue flame technology

Going green with blue flame technology

Oil boilers today are significantly more efficient that older oil-fired appliances. This is why when a homeowner upgrades their old oil boiler for a new one, such as a Grant VortexBlue oil boiler, they will see their fuel usage drop as well as their fuel bills. Furthermore, a Grant VortexBlue boiler has ultra-low NOx emissions so choosing a Grant blue flame boiler can help homeowners make their heating greener and more sustainable.

Discover more about how the Grant VortexBlue oil boilers differ to other boilers with our YouTube video here.


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


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