Award winning Grant Vortex condensing boiler range, available in outputs from 12-70kW. Endorsed by the Energy Savings Trust, the appliances are currently some of the most efficient oil-fired boilers on the market.

Oil Boilers

Why upgrade to a Grant oil-fired boiler?

Designs like the ‘Multi Pass’ boiler achieved efficiency levels far in excess of any UK or European Standards and have helped thousands of homes to reduce their annual fuel bills. So it will come as no surprise to see Grant yet again leading the way with the Grant Vortex andRead More

VortexBlue Range – Internal Models

The Grant VortexBlue combines our existing proven condensing boiler technology with a revolutionary new blue flame. Using a new state-of-the-art Riello Blue Flame compact burner alongside the familiar Vortex oil-fired boiler, this market-leading combination gives you an easy to install, reliable product with those all-important low emissions. Grant’s R&D Team have beenRead More

VortexBlue Range – External (Outdoor Modules)

The Grant VortexBlue external modules have some of the highest oil-fired boiler efficiencies available today. These models are ideal for situations where a white cased kitchen/utility version is not always the best solution, possible due to limited space within the home. Our external VortexBlue range is available in outputs from 15kWRead More

VortexBlue Range – Combi Models

The intelligent VortexBlue Combi incorporates the latest Riello RDB Blu burner technology teamed with our award winning Vortex stainless steel heat exchanger. The Grant VortexBlue Combi models are available as internal or external in three sizes: 21kW, 26kW and 36kW. Featuring large heat exchangers which, due to their low waterRead More

Vortex Eco Range – Utility Models

Vortex Eco Utility models feature the latest version of the Grant Vortex stainless steel heat exchanger and baffle system and come in outputs ranging from 15–35kW. The boilers also have a simplified casing, control panel and pipework arrangement, making them the ideal choice for utility room installations. The condensate trap comesRead More

Vortex Eco Range – External (Outdoor Modules)

Grant developed the first oil-fired external boiler in 1986 and although the concept was new to the oil market, it quite quickly became a popular addition to Grant’s boiler range. Today, as around one in four oil boiler installations are external, Grant have expanded the number of options available with theRead More

Vortex Pro Range – Utility Models

Grant Vortex Pro boilers have been designed to enable unique programmer options to be used with the unit. A plug-in programmer (Part Code: EPKIT) can be fitted within the boiler control panel. The range includes the unique award winning Vortex stainless steel condensing heat exchanger with turbulator baffles. The 15-21kWRead More

Vortex Pro Range – External (Outdoor Modules)

The Grant Vortex external module range encompass the original Vortex heat exchanger and have some of the highest efficiencies available in the market today. The boilers are available in six outputs ranging between 15 and 70kW (50-240,000 Btu/h). The Vortex Pro range of external modules feature the same unique benefits asRead More

Vortex Eco Range – Internal Wall Hung Models

The Grant Eco wall hung oil-fired condensing boiler range includes four internal and four external high efficiency models. Boilers are available in 12-16kW and 16-21kW outputs in both system and open vented versions. These unique appliances are pre-plumbed and encompass the patented Grant Vortex stainless steel heat exchanger. Internal wallRead More

Vortex Eco Range – External Wall Hung Models

The Grant Eco wall hung oil-fired condensing boiler range includes four internal and four external high efficiency models. The boilers are available in 12-16kW and 16-21kW outputs in both system and open vented versions. These unique appliances are pre-plumbed and encompass the patented Grant Vortex stainless steel heat exchanger. ExternalRead More

Vortex Pro Range – Internal Combi Models

The latest Grant Vortex Combi models feature internal frost protection, 24ltr expansion vessel, neon diagnostic indicators and a factory fitted internal condensate trap (this can be sited externally if preferred), all designed to make installation and servicing easier. The Grant Vortex Electronic Condensing Combi boilers are available in three sizesRead More

Vortex Pro Range – External Combi Models

The latest Grant Vortex External condensing combi models feature internal frost protection, 24ltr expansion vessel, neon diagnostic indicators and a factory fitted internal condensate trap (this can be sited externally if preferred), all designed to make installation and servicing easier. They also feature a multi-directional factory fitted low level flue,Read More

Vortex Range – Boiler House Models

The new Grant Vortex Boiler House models come in a distinctive powder coated casing in our iconic Grant red and feature externally mounted Riello RDB burner and thermostat. These boilers are ideal for locations that are difficult to access like cellars or plant rooms, where a white cased utility version is notRead More

Oil Fired Boiler Case Studies

New Vortex Boiler Houses welcome two homes to the red side

Two Grant Vortex Boiler House models, with their eye-catching red case, have recently been installed at properties in Dorset, delivering reliable home heating with their iconic new look. In September this year, Grant UK launched new models to join its Vortex oil fired condensing boiler range. Six new Vortex BoilerRead More

Martin Roberts warms up with a Grant VortexBlue

Earlier this year, television and radio property expert and author, Martin Roberts, turned to Grant UK for a replacement oil boiler to fulfil his property’s heating needs. Martin selected a Grant VortexBlue which, with its cleaner burning technology, is now keeping his home warm and toasty for many years toRead More

Out with the old and in with the Blue!

Since its launch last month, demand for the innovative new Grant VortexBlue oil-fired condensing boiler range has been high. Dempsey Heating Ltd, a Grant UK G-One accredited installer, was one of the first to fit the new blue flame boiler which is now keeping a home in Norfolk warm withRead More

19th century cottage now being heated by a Vortex Pro boiler

A cottage that was originally built in 1850 in a small Wiltshire village is now being kept warm by a Grant Vortex Pro 15-21kW kitchen/utility oil-fired boiler. Replacing an appliance that was over fifteen years old, the new Vortex now installed is providing reliable heating to the property, efficiently andRead More

Out with the old and in with a new Grant Vortex

A three storey property in Argyll has recently upgraded its heating system with a Grant Vortex oil-fired boiler which is working alongside a Grant energy management control system, providing warmth throughout the building. Vortex oil-fired boilers are renowned for their efficiency, but the effect of energy management controls can sometimesRead More

Grant Vortex Eco Utility boiler now warming up a Wiltshire farmhouse

Grant’s range of Vortex Eco Utility condensing oil boilers are known for being competitively priced, efficient and reliable. Consequently, receiving positive feedback about these boilers from both installers and householders is not uncommon. In early November, a Vortex Eco Utility 26/35kW boiler was installed into a large farmhouse in Devizes,Read More

Townsends take up renewables

Established in 1945, W.J Townsend & Son is a family run business providing domestic customers in Towcester and surrounding areas with a comprehensive range of plumbing and heating services. The business has been in the family for over 75 years with William John Townsend, founding the company. Andy his sonRead More

Dual fuel is twice as good

A large residence in Norfolk converts from a standard oil fired system to a renewable biomass boiler and condensing oil boiler combination, reaping the benefits of both high product efficiency and low running costs. This beautiful 19th century, six bedroomed residence on the Norfolk Broads has undergone a complete heatingRead More

Primary school cuts costs with Vortex boiler house

Crowenstown National School, one of the oldest primary schools in Ireland, founded in 1841, has installed the very latest Grant Vortex Pro Condensing boiler house boiler, to help cut energy costs. The original building was demolished in 1938, replaced with the current school which has three classrooms, a staff roomRead More