Tel: 01380 736920 | Email: info@grantuk.com
Oil Boilers, Biomass Boilers, Solar PV, Air Source Heat Pumps, Hot Water Cylinders

Welcome to Grant UK

As a leading heating company in the UK and Ireland (see Grant Ireland), we have been designing and manufacturing reliable and easy to install heating products for over 35 years.

From our award winning Vortex oil fired condensing boilers to the latest renewable technologies like solar thermal, air source heat pumps, cylinders and the new Spira condensing biomass boilers (wood pellet), our heating systems have a reputation for quality that is second to none.

We combine precision engineering, innovation, performance and value for money to produce sustainable heating solutions that are trusted by both installers and householders. There is never a compromise on quality. We design all products so that you can be sure that the durability and efficiency are sector leading. Our belief in simple solutions ensures that, while our technology is sophisticated, our products are low maintenance and easy to install. For a high quality, reliable and sustainable heating system, trust in Grant.



Our Products
Oil Fired Condensing Boilers
Heating Controls
Solar Thermal
Hot Water Cylinders
Air Source Heat Pumps
Grant Biomass Boilers
Information Downloads


  • Grant launches latest ThermaWave range

    • Combining renewable technologies with traditional heating systems in one thermal store is now even easier than ever thanks to the launch of the new Grant ThermaWave, which allows multiple heat sources to be connected, all with a 3kW immersion heater back-up. The Grant ThermaWave is available in three variations: open-vented […]

  • Proposed changes to biomass fuel purchase in 2015

    • The Government are planning to bring in a new sustainability criteria for installations utilising biomass fuels under the Non-Domestic RHI. From spring 2015, existing and new participants must use sustainable fuels to continue to receive RHI payments. Using sustainable fuel bought through the Biomass Suppliers’ List, is the easiest way […]

  • Grant launches latest ThermaWave range

    • Combining renewable technologies with traditional heating systems in one thermal store is now even easier than ever thanks to the launch of the new Grant ThermaWave, which allows multiple heat sources to be connected, all with a 3kW immersion heater back-up. The Grant ThermaWave is available in three variations: open-vented […]

  • New Grant Biomass Forum

    • We are pleased to announce the launch of our new Grant biomass technical forum.  This new hub is designed to help installers quickly find the answer to product related technical queries and have discussions with other forum users about the Grant wood pellet boiler range and accessories. There are also areas for G-One […]

  • Grant launches latest ThermaWave range

    • Combining renewable technologies with traditional heating systems in one thermal store is now even easier than ever thanks to the launch of the new Grant ThermaWave, which allows multiple heat sources to be connected, all with a 3kW immersion heater back-up. The Grant ThermaWave is available in three variations: open-vented […]

  • New Grant Biomass Forum

    • We are pleased to announce the launch of our new Grant biomass technical forum.  This new hub is designed to help installers quickly find the answer to product related technical queries and have discussions with other forum users about the Grant wood pellet boiler range and accessories. There are also areas for G-One […]

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