ceiling air inlet

The negative pressure automatically opens the wind window, which is sensitive and convenient to open and close. It automatically maintains the indoor and outdoor pressure difference (the automatic opening pressure can be adjusted freely) and can soften the external strong light. The plate uses domestic famous brand products, which has good light transmission and is not easy to deform. The rotating shaft adopts solid stainless steel round, stable and reliable opening and closing. Pulling and opening parts can be added, and winch is used to control opening and closing. The surface of the black weight has been treated 6 times to prevent rust and the overall appearance is more beautiful. Various sizes can be customized to meet customer needs.