GNB specialize in cast iron radiators , cast iron boilers, steel boilers and gas convectors. GNB's portfolio also includes an exciting and extensive range of decorative stainless steel radiators and towel rails.GNB is always looking to bring innovative products to market and extend it's wide product range even further to cater for every taste. Whether that is developing a spectacular gasifying boiler and pellet boiler or adding sophistication to cast iron radiators such as the Historic Style cast iron radiators, GNB is innovative in every sense of the word.