H type Fin tube have two steel discs,with fluorescent tubes symmetrically welded together to form fins(fins of butterfly piece)creating a shape that looks somewhat like the letter”H”. Creating an efficient energy saving, extension heating surface. H-fin Tubes also have a high rate of fusion welds and weld tensile strength.H-fin Tube is assembled with the H economizer. Which has high efficiency,little resistance,less wear and light weight.