Based in Wiltshire, Grant has led the oil boiler market in the UK for more than 35 years. In recent years they have expanded their product range to focus on improving the energy efficiency of their boilers through condensing technology. In addition, they also now offer a range of renewable energy solutions including biomass boilers, solar thermal technology and air source heat pumps. Award-winning Grant boilers range from 15-70kW and are endorsed by the Energy Saving Trust.
Grant Product Range
- Oil Fired Boilers (Combi, System and Regular)
- Biomass Boilers
- Air Source Heat Pumps
- Solar Thermals
- Cylinders / Thermal Stores
- Energy Management Controls
- Hybrids
View the complete range of Grant boilers
Popular Combi Boilers
There are several Combi boilers in Grant’s product range including models suited for both internal and external installation. They are supplied with water directly from the mains with no need for a feed and expansion tank and heat water on demand for both heating and domestic use.
VortexBlue Combi Internal | VortexBlue Combi External | VortexPro Combi Internal | VortexPro Combi XS Compact | |
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Available Outputs (kW) | 21, 26, 36 | 21, 26, 36 | 15-21, 21-26, 26-36 | 26 |
Dimensions (mm) | 860 x 614 x 606 (36kW = 900 x 614 x 606) | 945 x 658 x 754 | 860 x 614 x 606 (26-36kW = 900 x 614 x 606) | 857 x 515 x 606 |
Central Heating Energy Rating | A | A | A | A |
Water Heating Energy Rating | B | B | B | B |
Water Heating Energy Rating | 2 years | 2 years | 2 years | 2 years |
Warranty when installed by G-One installer | 10 years | 10 years | 5 years | 5 years |
Popular System Boilers
Grant System boilers include a factory fitted expansion vessel, filling loop, pressure gauge, automatic air vent, high efficiency circulating pump and pressure relief valve. The boiler will produce hot water for your central heating and can be installed without a feed and expansion tank in the attic. When paired with a hot water cylinder (also available from Grant) these boilers will also produce hot water for your taps.
VortexBlue Internal Sealed System | Vortex Eco Internal Wall Hung Sealed System | Vortex Eco External Wall Hung Sealed System | |
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Available Outputs (kW) | 15-21, 21-26, 26-36 | 12-16, 16-21 | 12-16, 16-21 |
Dimensions (mm) | 860 x 470 x 603 (36kW = 900 x 470 x 603) | 840 x 580 x 322 | 837 x 635 x 350 |
Energy Rating | A | A | A |
Standard Warranty | 2 years | 2 years | 2 years |
Warranty when installed by G-One installer | 10 years | 5 years | 5 years |
Take a look at the energy efficiency rating of Grant boilers here.
Popular Regular Boilers
A Regular or Utility boiler from Grant is the ideal replacement model for older heating systems and large homes with a high demand for hot water. They are usually fed their water supply by a feed and expansion tank in the loft and require a hot water cylinder in order to produce hot water for your taps.
Vortex Eco Utility | Vortex Pro Utility | Vortex Blue Internal | |
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Available Outputs (kW) | 15-21, 21-26, 26-36 | 15-21, 15-36, 26-36, 36-46, 46-58, 58-70 | 15-21, 21-26, 26-36 |
Dimensions (mm) | 860 x 430 x 605 (36kW = 900 x 470 x 603) | 855 x 348 x 566 – 1234 x 563 x 786 | 860 x 470 x 603 (36kW = 900 x 470 x 603) |
Energy Rating | A | A | A |
Standard Warranty | 2 years | 2 years | 2 years |
Warranty when installed by G-One installer | 5 years | 5 years | 10 years |
Popular Discontinued Boilers
Below you can find more information about some of Grant’s most popular discontinued models (ideal if you want to compare your current boiler to their new offerings).
Grant Euroflame System 50-90 Oil | Grant Combi 90 Mk II Oil |
Grant Euroflame 90-120 Boilerhouse Oil | Grant Euroflame Boilerhouse 70-90 Oil |
Grant Euroflame Condensing Boilerhouse 70-90 Oil | Grant Euroflame Outdoor Module 50-70 Oil |
Grant Euroflame Kitchen / Utility 50-70 Oil | Grant Multipass Boilerhouse 110-140 Oil |
Grant Multipass Boilerhouse 70-90 Oil | Grant Combi 90 V3 Oil |
Grant Multipass Boilerhouse 160-200 Oil | Grant Multipass Boilerhouse 90-110 Oil |
Grant Multipass Boilerhouse 140-160 Oil | Grant Euroflame Kitchen / Utility 70-90 Oil |
Grant Euroflame Condensing Module 90-120 Oil | Grant Combi 70 Mk II Oil |
Grant Euroflame Outdoor Module 70-90 Oil | Grant Euroflame Boilerhouse 50-70 Oil |
Grant Euroflame Condensing Boilerhouse 50-70 Oil | Grant Vortex Condensing Combi 26 Oil |
Grant Euroflame Condensing Module 70-90 Oil | Grant Euroflame Condensing Indoor 70-90 Oil |
Grant Multipass Kitchen 50-70 Oil | Grant Vortex 20G Utility System Oil |
Grant Multipass System 70-90 Oil | Grant Outdoor Combi 90 V3 Oil |
Grant Euroflame 90-120 System Kitchen Utility Oil | Grant Multipass Kitchen 140-160 Oil |
Grant Euroflame Condensing Module 50-70 Oil | Grant Euroflame Kitchen/Utility 90-120 Oil |