Business Details
48 Years
experience
Sustainable Heating Solutions for Homes
At Grant UK, we have dedicated ourselves to delivering sustainable and high-performing heating systems since 1978. Our mission is to provide homeowners with innovative solutions that address rising fuel costs and climate change challenges. With over four decades of experience, we design and manufacture oil-fired boilers, air source heat pumps, hybrid systems, and renewable technologies. Our award-winning products, including HVO-compatible boilers and Quiet Mark-accredited heat pumps, reflect our commitment to efficiency and environmental responsibility. We offer comprehensive support through extended warranties, ServicePlan maintenance packages, and a nationwide network of certified installers.Our team prioritises customer satisfaction, ensuring every home receives tailored heating solutions that combine traditional reliability with cutting-edge innovation. Recognised with over 35 awards, we continue to lead the transition to low-carbon heating while maintaining our heritage of excellence. Through initiatives like the Kick The Carbon campaign and partnerships with organisations such as Bath Rugby Club, we actively promote sustainability beyond our products. Whether upgrading existing systems or designing new installations, we strive to make efficient, future-ready heating accessible to all homeowners.
Services
Oil Boilers
Air Source Heat Pumps
Hybrid Heating Systems
Underfloor Heating
Solar Thermal Systems
Hot Water Cylinders
Radiators
Boiler Servicing
Installer Training
Renewable Heating Solutions
Details
- Year established: 1978
Highlights and features
- We have over 40 years of experience in heating system innovation.
- Our products have won over 35 awards for design and performance.
- We offer HVO-compatible boilers and renewable energy solutions.
- We provide nationwide installer support and extended warranties.
- Our Aerona heat pumps feature patented noise-reduction technology.
Associations and certifications
- Quiet Mark
- MCS (Microgeneration Certification Scheme)
Services
Oil Boilers
Grant's Vortex oil boilers deliver high-efficiency heating with HVO biofuel compatibility. Available in floor-standing, wall-hung, and combi models, these boilers offer up to 10-year guarantees when installed by certified professionals. Our 40+ years of engineering expertise ensures reliable performance while reducing carbon emissions through renewable fuel options.
Air Source Heat Pumps
The Aerona 290 air source heat pump combines R290 refrigerant technology with Quiet Mark accreditation for ultra-low noise operation. MCS-certified and eligible for government grants, these systems provide sustainable heating with smart controls integration and 7-year installation guarantees through our G1 Installer network.
Hybrid Heating Systems
Our VortexAir hybrid systems integrate oil boilers with air source heat pumps for optimal efficiency. This dual-technology approach reduces fuel consumption by up to 30% while maintaining consistent home comfort, supported by comprehensive installation and maintenance support from certified engineers.
Underfloor Heating
Uflex underfloor heating systems provide even heat distribution across living spaces. Compatible with both traditional and renewable heating sources, these systems feature quick-install manifolds and smart controls integration for energy-efficient temperature management in new builds and renovations.
Solar Thermal Systems
Grant's solar collector systems harness renewable energy for domestic hot water production. Combined with our Quick Recovery cylinders, these systems reduce conventional heating demand by up to 60% annually, supported by thermal store integration and professional installation guidance.
Questions
What types of heating systems does Grant UK manufacture?
We produce oil-fired boilers, air source heat pumps, hybrid systems, solar thermal solutions, underfloor heating, and radiators for residential properties.
Are Grant boilers compatible with renewable fuels?
Yes, our Vortex oil boilers are HVO-compatible and can be converted to use Hydrotreated Vegetable Oil biofuel.
Do you offer warranties on heating products?
We provide up to 10-year guarantees on Vortex boilers and 7-year guarantees on Aerona heat pumps when installed by certified professionals.
How can I find a local installer for Grant systems?
Use our online installer search tool to locate certified heating engineers in your area.
Are Grant heat pumps eligible for government grants?
Yes, our MCS-certified Aerona heat pumps qualify for the Boiler Upgrade Scheme with grants up to £7,500.
What support options exist for existing Grant system owners?
We offer ServicePlan maintenance packages, product guarantees, and technical support through our nationwide installer network.
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Reviews (3)
Lynn Dickie
Jun 10, 2018
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Having an oil boiler fitted at the moment, was asked to buy a Grant by the plumber, have always fitted Worcester in the past. Bought a 15/26 utility which must be one of their most popular sizes and which is supposed to offer four outputs depending on the jet fitted. The outputs are 15,20,23 and 26kW. I was planning to use 20kW to give a bit of headroom for future extensions but I was irritated to find (after reading the detailed installation instructions) that to make use of the the two lower outputs a different blast tube must be purchased and is not supplied. In my opinion if the boiler is advertised
Valerie Reis Fernandes
Aug 24, 2017
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Beware. My new boiler cost me 3000 including installation and failed after 15 months. Grant did their best to convince me it was my system at fault and wanted to charge me for another new one! Customer service is dire and hope I never have to deal with them again.
Brianna'S. Hair & Beauty Salon
May 04, 2017
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I can highly recommend Grant oil boilers. The key is to have the boiler correctly specified and installed to avoid common issues you may find online. I have been installing Grant boilers for over 12 years and never had any problems. The company is very helpful when specifying their Hybrid and air source heat pump range.
