... solar heater collector. Main feature:1.Without water tank,improve the useful space indoor;2.High efficiency ... ,new basking way,bask water directly;3.Never mix water,give much hot water, water quality is clean and ... quite a lot.5.Food grade quality,the water can be drank directly6.Achieve building integration, ... Certification Center. We have no water tank, and store the hot water by pipes.One kind of our ...