What does the hood of the roof do?

1. The hood above the flue of residential building is designed according to national standards and specifications. It is necessary to meet the standards of rain and snow, and to prevent rain and snow from entering the flue, causing a series of problems caused by flue water inflow.

2. It is necessary to have the function of smooth smoke exhaust while protecting from rain and snow. By guiding the external natural wind to extract air from the whole exhaust duct, it plays the role of exhaust, such as the exhaust hood of Wanju and the negative pressure hood of cement.