GNB specialize in cast iron radiators , cast iron boilers, steel boilers and gas convectors. GNB&＃39;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&＃39;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.