Newsletter Sign-up

Northern Ireland’s Award Winning Oil-Fired Condensing Boiler

Innovation is at the heart of everything we do

Our highly efficient heating products have a reputation for quality that is second to none. We focus on providing cost effective solutions to the problem of rising energy costs. With an established history of over 40 years designing, manufacturing and supplying a wide range of highly efficient heating products, Grant has become a firm favourite for many householders and installers, when choosing a new or replacement heating system.

Highly efficient heating products

Despite the sophisticated technology employed in the development of new products, Grant have kept true to the original concept of simplicity in installation and maintenance, which are essential ingredients of today’s heating systems. Grant products are manufactured from the highest quality materials and designed not just to meet, but to exceed all relevant performance and environmental standards.

*NI Plumbing & Heating Awards

You’re in good hands

With our renowned customer care we’re with you every step of the way.

Homeowner Support

Our Homeowner Section has Helpful tips and FAQs, advice on incentives & grants, brochures and a list of GRANT Stockists.

Trade Support

Our Trade section has links to Technical Manuals and Data, Oil EPC & Solar EPC worksheets, installation advice and much more.