air inlet characteristics and paramerers :

 outside plan

 Appearance size,width 600mm,height320mm,thickness 160mm.

High quality plastic,high durability,ageing resistant.

Close tightly,open flexibly,with nets.

In-built polystyrene board(thickness,20mm)

High quality and inexpensive,applicable to standard hens for livestock and poulty.

The automatically well ventilated window hides photomasc

Galvanized ouelet sheet,steel framework

Inside galvanized sheet

30mm heat nonconducting polystyrene board

maximum indoor ventilation in winter,achieving balanced air circulation and humidity-decreasing.