flat plate solar collector are simple efficient design, durable and economical for application of solar systems for school,hotel Characteristics of Flat plate Solar Collector:a.Flat-plate solar collector is high efficient and pressurized. The life span isabout 15 years.b.Flat-plate solar collector has no anti-freeze function. c.Therefore, it is suitablefor south area use.d.Specification: 1x2m² ...