H fin tube, known as Double H / Square fin tube & Fin economizer, is used in ... tube, square fin tube.It is a kind of boiler parts, to have two steel circular symmetry to be ... good thermal conductivity. H-economizer can also manufacture dual tube "double H" type fin tubes, its rigid structure, and can ... with customers' requirements.Welcome to contact us. H/Double H/Square fin tube & Fin economizer