Non-pressure solar water heater relies on the natural circulation of water between the collector and the tank or heat exchanger. As water in the vacuum tubes is heated it rises naturally INTO the tank, while cooler water in the tank flows down to the bottom of the vacuum tubes, causing circulation throughout the system.

Installation sketch

The system includes parts as follow:
1. Solar water heater main unit    2.Controller    3.Electric heating

1. Solar water heater main unit

Specifications

Model	Capacity  (L)	Fit For (person)	Quantity 20/40GP	Picture
CS-WH-II -12Q	90	Non-pressure solar water heater is popular with warm areas. High efficiency, easy installation and low cost CS-WH-II (DIA47-1500) CS-WH-IV(DIA58-1800)	1-2	70/145
CS-WH-II -14Q	100		1-2	60/125
CS-WH -II-16Q	120		2-3	55/110
CS-WH -II-18Q	140		3	50/100
CS-WH -II-20Q	160		4	45/90
CS-WH -II-24Q	200		4-5	35/75
CS-WH -II-30Q	260		5-6	30/60
CS-WH-IV-12Q	120		1-2	60/125
CS-WH-IV -14Q	140		2-3	50/105
CS-WH -IV-16Q	160		3-4	45/90
CS-WH -IV-18Q	180		4	40/80
CS-WH -IV-20Q	200		4-5	35/75
CS-WH -IV-24Q	240		6-7	30/60
CS-WH -IV-30Q	300		8-9	25/50
CS-WH -IVS-12Q	120	1) Non-pressure solar water heater is popular with warm areas. 2)High efficiency, easy installation and low cost 3)All made by stainless steel	1-2	60/125
CS-WH - IVS -14Q	140		2-3	50/105
CS-WH - IVS -16Q	160		3-4	45/90
CS-WH - IVS -18Q	180		4	40/80
CS-WH- IVS -20Q	200		4-5	35/75
CS-WH- IVS -24Q	240		6-7	30/60
CS-WH- IVS -30Q	300		8-9	25/50

2.Controller

Intellective micro computer with Temp. control, Water Level control and Time control. Colorful screen.

Include:
● Temp. & Water Level Sensor
● Electromagnetically Operated Valve

3. Electric heating(optional)