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All Warmflow boilers are British Made in Lisburn, Northern Ireland using the latest manufacturing equipment and highest quality materials. This includes Riello burners, Grundfos pumps & Honeywell valves in the manufacture of all boilers so you can be assured that only the best quality components are used. In addition, all of their oil boilers now come with a 5mm primary heat exchanger, reinforcing the high quality of the products and providing peace of mind for installer and homeowner alike. All primary heat exchangers are welded using robotic welders to ensure consistency of quality every time.