... efficiency of heating,new basking way,bask water directly;3.Never mix water,give much hot water, water quality is clean and clear;4.Save ... used,save family electricity quite a lot.5.Food grade quality,the water can be drank directly6.Achieve building integration,save charges ... and 3C certificate by China Quality Certification Center. We have no water tank, and store the hot water by pipes.One kind of ...