Year guarantee*
Vortex Pro: External
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 HeatingFeatures & benefits
The 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.
- Compliant with September 2018 low NOx legislation
- Outputs ranging from 15-70kW
- 90.7- 93.3% Gross SAP2009 annual efficiency
- 5 year guarantee when installed by a G1 accredited installer (T&C’s apply)
- Factory-fitted multi-directional flue
- Built-in frost protection
- Fitted with tried and trusted Riello RDB Lo-NOx burner
- Unique Grant Vortex stainless steel heat exchanger
- Exceptionally quiet operation
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.
Find a merchant
Use our national merchant search to find a Grant supplier near you
Configure your flue
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 toolSpecification
Product 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
Downloads
Accessories
Grant Vortex Mag One Magnetic Filter
- Filters magnetite and non-ferrous debris
- Simple to install, easy to clean, easy to drain design
- 12000 gauss neodymium magnet
EZ-Fit External Low Level / High Level Flues (Green System) for internal boilers
- Suitable for Grant Vortex boilers up to 70kW
- Starter kits can be extended using extensions and elbows from the low level balanced Yellow System.
- Convert existing Yellow System low level flue to an external high level/vertical arrangement (Plume diverter)
Related products
Grant High Performance Wave Cylinders
- Fast recovery stainless steel corrugated coils (all indirect models)
- Immersion heater
- Specifically matched to our Grant Aerona³ air to water heat pump range
Vortex Blue: External
- Award winning range
- Outputs of 15-21, 21-26 and 26-36kW
- 90.7- 93.3% Gross SAP2009 annual efficiency
Vortex Eco: External
- Award winning range
- Outputs ranging from 15–35kW
- 90.3 – 90.8% Gross SAP2009 annual efficiency
