... solar water heater: 1,instant heating 2,economical and high-efficiency 3,module design and popular 4,easy installatio Split Solar air heater features ... : 1077x181x120cm16) Packing: carton/wooden frame(for vcauum tube)17) Water tank capacity: 250L18) Reflex angle: 27/38/4519) Weight: ... /1set20) Seals: Silicone polymer.21) Screw material: Stainless steel22) Water tank type: pressurized OEM is available