Navien oil boilers are pushing the boundaries of oil heating with their new revolutionary blue flame burner meeting the new NOx regulations in the cleanest way. Ultra light weight due to their unique stainless steel heat exchanger. Incredible indepth control options maximising efficiency. Full range coverage for all your heating and hot water requirements. 10 year warranty on every boiler.
Grant Oil boilers are solid and reliable. Made of strongest all metal components for ultimate reliability. They come with one of the best burners on the market which is made by Riello. They offer the unique clean burning Blue Flame burner which meets the new NOx regulations. Warranties range from 5 to 10 years.