Automatic control of 21century type! Powerful hot-wind and epoch-making save fuel!   Products feature 1.Automatic changing temperature controller with 4 steps   (Control box) 2.Semi-automatic system device 3.Temperature sensor separation 4.Automatic device of electromagnetic excessive contact breaker 5.Automatic ventilation device 6.Special combustion room and exchanger 7.Ventilator, order starter device 8.Alarm sound, alarm lamp device 9.Control thunderbolt protecting device   Products using place · Agricultural Cucumber, Melon, Red pepper, Flowering glass, Stawberry, Tomato, Water melon, Pumpkin, Grape, Orange, Mushroom, Jujube, Tabacco plant, Chinese matrimony vine, Medicinal herbs ect. · Livestock : Chicken farm, Cow-house, Pigsty. · Marine Nursery, Marine products drying place, Shrimp, Dried laver, Brown seaweed. Salted dry fish. · Industrial Workshop heating, Manufacture dryness (Construction) Indirect style dryness.