Air Inlet Main Components

Window: Plastic contains the anti-ultraviolet raw material, making it longevity.

Protection Net: Reasonable structure, material is Polypropylene

Nylon Pulley: Designed by patent organization, it is of rolling friction when turning on or off, low resistance and easy opening and closing.

Return Spring: High-quality stainless steel spring, durable and rustless

Pulley Accessories: Rigidity hard-drawn wire round steel, ensuring accurately opening. 

Rigidly connected will not be stretched, the surface is treated by galvanization in case of rust 

Characteristics:

1, The open-close of air inlet adopt Nylon pulley and rolling friction, the resistance is low, and inner is filled with 20mm Polystyrene to ensure the warm-keeping of the air inlet.

2, A group of air inlet could be opened at three angles which can realize ever ventilation

3, To realize uniform ventilation, angle of inlet near the fan should be smaller than those far from it.

4, Plastic contains the anti-ultraviolet raw material, making it longevity.

5, The spring of air inlet is stainless steel material, which is durable, rustless and not out of shape, the technics is delicate and ensure to be seamless after closing the air inlet.