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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 HeatingThe Grant Vortex Pro external models combine our existing proven condensing boiler technology with the latest Riello RDB low NOx compact burner.
The Vortex Pro Range of external modules offers the same unique features as the Eco External modules including the factory fitted multi-directional flue, high quality external powder coated casing, built in frost protection, mains isolating switch and a test switch. However, in addition, the boilers have a higher efficiency level and are factory wired to receive an ‘optional’ RF (radio frequency) wireless programmer.
Sealed System Kits
The Grant Pro range of Standard Vortex external modules can be converted to sealed system operation by purchasing a pre-assembled kit from Grant UK. The sealed system kit includes an expansion vessel (size varies), automatic air vent, pressure relief valve and circulating pump. A filling loop and pressure gauge are also supplied as part of the kit. These can be fitted within the module casing, or ideally in a convenient site within the building, located between the cold main and central heating return.
Consumer group Which? have published the results of their 2019 oil boiler survey. Amongst the range of products to receive Which? Best Buys this year are all of Grant’s Vortex Pro Utility oil boilers. This is the third year running that Grant boilers have achieved this accolade making them the only oil boiler brand to be awarded Which? Best Buys in 2017, 2018 and 2019.
The Which? Best Buy logo is widely recognised as an endorsement that reflects confidence, trust and reliability in products. The Which? Best Buys and the supporting surveys play an important role in the decision-making process for householders researching new appliances for their home. Grant Engineering is therefore thrilled to have the high-quality build of their Vortex Pro Utility models, for example, acknowledged in the latest Which? survey with Best Buy status.
Read more on our news page.
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We have a wide range of options available when it comes to flue systems, here's a helpful hand to put the right flue with the right boiler.
Use toolProduct code |
Model |
Set Output |
Max Output |
Weight |
Height |
Width |
Depth |
Efficiency |
NOx Emissions |
Tappings Flow/Return |
Burner |
Energy Rating |
Load Profile |
Energy Label |
Product Fiche |
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VTXOM15/21 | Vortex Pro External 15-21 | 21kW | 21kW | 109kg | 879mm | 385mm | 734mm | 90.81 | Class 2 | 22mm | Riello RDB | a Heating | - | View | View |
VTXOM15/26 | Vortex Pro External 15-26 | 21kW | 26kW | 143kg | 908mm | 505mm | 800mm | 91.71 | Class 2 | 22mm | Riello RDB | a Heating | - | View | View |
VTXOM26/36 | Vortex Pro External 26-36 | 31kW | 36kW | 162kg | 908mm | 505mm | 800mm | 94.56 | Class 2 | 28mm | Riello RDB | a Heating | - | View | View |
VTXOM36/46 | Vortex Pro External 36-46 | 41kW | 46kW | 162kg | 908mm | 505mm | 800mm | 90.00 | Class 2 | 28mm | Riello RDB | a Heating | - | View | View |
VTXOM46/58 | Vortex Pro External 46-58 | 52kW | 58kW | 274kg | 1240mm | 587mm | 945mm | 91.94 | Class 2 | 1 1/4" BSPmm | Riello RDB | a Heating | - | View | View |
VTXOM58/70 | Vortex Pro External 58-70 | 64kW | 70kW | 288kg | 1240mm | 587mm | 945mm | 91.61 | Class 2 | 1 1/4" BSPmm | Riello RDB | a Heating | - | View | View |