Which? 2018 Energy Savings Trust
Vortex Pro: External Combi

5 Year guarantee*

Vortex Pro: External Combi

The Grant Vortex Pro range has some of the highest energy efficiency ratings in the UK which not only significantly lowers fuel bills but also considerably reduces greenhouse gas emissions and lessens the environmental impact of domestic hot water and heating systems. They incorporate the latest Riello low NOx burner technology with Grant’s patented heat exchangers to give an award winning range that meets the 2018 low NOx emission targets.

a Heating b Water

Features & benefits

The intelligent Vortex Pro Combi incorporates the latest Riello RDB low NOx burner technology and combines it with our award winning Vortex stainless steel heat exchanger.

The Grant Vortex Pro Combi features large heat exchangers which, due to their low water content and larger surface area, vastly increased the hot water performance. With a low system pressure cut off switch, the combi protects itself in the unlikely event of system water loss. 

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Additionally, there are two very accurate electronic temperature controls which allow the boiler to operate in condensing mode on central heating whilst maintaining its instant hot water production.

  • Compliant with September 2018 low NOx legislation
  • Outputs of 21, 26 and 36kW
  • 89.5- 91.6% Gross SAP2009 annual efficiency
  • Fitted with tried and trusted Riello RDB Lo-NOx burner
  • 5 year guarantee when installed by a G1 accredited installer (T&C’s apply)
  • 24ltr expansion vessel
  • Neon diagnostic indicators
  • Factory-fitted multi-directional flue
  • Built-in frost protection
Low NOx ready

Low NOx ready

On 26th September 2018, the next phase of the EU’s Energy-related Products Directive will come into effect. New legislation will set maximum nitrogen oxides (NOx) emission levels that space heaters will need to meet, reducing the overall NOx emissions produced from heating. For oil-fired boilers, the NOx emissions target will be a maximum of 120mg/kWh so all oil boilers placed on the market by the manufacturer on or after 26th September will need to be compliant.

One of the overarching objectives of the new legislation is to help improve the air quality by reducing pollution. In response to both Government regulations and a growing demand from homeowners, manufacturers have continuously explored ways to make their products more efficient and sustainable. The good news is that advances with burner technology coupled to Grant’s efficient boiler designs have enabled all of our Vortex Pro and Eco boiler ranges to achieve these new targets with virtually no visible change to the existing line up.

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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 VTXOMCOM26 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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