... tube & Fin economizer, is used in boilers, marine power, heat exchanger components Definition:H fin tube, also know as Doulbe ... boilers, industrial boilers, marine power, such as the tail of heat exchanger components. Principle:H-economizer two rectangular fin, similar to ... square, its edge length for the fluorescent tubes of 2-fold, an expansion of the heating surface. H-economizer flash resistance ...