1.The air inlet which is made of high quality engineering plastic injection process has bigger density and more strength.

2.Adding the ultraviolet resist resin into the raw material to extend service life.

3.Easy to be opened,net which is assembled outer would protect damage from birds

4.There is a PE heating board which is thick as 20mm fill in the inlet to avoid lost of heating in winter.

5.Specification:Width:600mm.Heigh:320mm.Thickness:160mm