pictures

important parts

pulley system	air inlet door

1. The product is made of high quality engineering plastic which has big density and good security.

2. Raw material added with ultraviolet extend the service life of air inlet.

3. Double springs ensure good performance and make it is easy to be opened.

4. Protecting net can help to protect the damage from birds.

5. PE heating board filled in the inlet to avoid the lost of heat in winter. Thickness is 20mm

6. Size: width:600mm, height: 320mm, thickness: 160mm

Size of window reserved