1.SST Heating Energy Co.,Ltd are TOP 1 export water tank in China. 2.SST had CE,CB,ERP,WRAS,KTW,WATERMARK,UL certificate.3.Dedicated to R&D of stainless steel water tanks for over 19 years. 4.Digital management with multiple automated production lines 5.Annual output exceeds 300,000 units 6.Factory area:30,000 m2 7.Professional equipment for analysis raw material and welded part composition 8.OEM &ODM customize