Galvanized steel, thickness: 1.5mm; Angle: 20-45 degree up to your country;
Model
Absorber Area
Tank Capacity
LTY-TF12-58/1.8
1.5
120L
LTY-TF15-58/1.8
1.88
150L
LTY-TF18-58/1.8
2.25
180L
LTY-TF20-58/1.8
2.5
200L
LTY-TF24-58/1.8
3
240L
LTY-TF30-58/1.8
3.75
300L
Pls. Note: The non-pressurized system has two capacities. One is real tank capacity and another one is the vacuum tube's water capacity. For example, LTY-TF12-58/1.8, the real tank capacity is 100Liter, but the whole capacity is 120L. The tank capacity depends on the family members: 100Liter for 2-3 people 150Liter fo r3-4 people 200Liter for 4-5 people 250Liter for 5-6 people 300Liter for 6-7 people.
The non-pressurized system is suitable to warm weather like Middle East, South America and Africa etc.
So if you have the South Africa, you can introduce the non-pressurized solar water heater.