Square calculation formula of air duct

Square: (width+height) ×2× length = air duct area.

Circle: 2πR× length = pipe area. A circle is the circumference x the length of the whole ventilation duct, the circumference = 2x3. 14xr, and r is the radius of the circle.

According to the national building materials industry standard JC646-2006, ventilation ducts can be divided into three types: integral ordinary air duct, integral thermal insulation air duct and combined thermal insulation air duct, which are not suitable for oil fume exhaust ducts in residential buildings. The size is mainly designed by the design unit according to the ventilation required by the project, and can also be designed according to the specific requirements of customers.

Extended data

The installation of air ducts must be carried out after the completion of these basic projects; Before installation, the appearance quality should be checked, and the dust and sundries on the inner and outer surfaces of the pipeline should be removed.

If it is not installed temporarily, don't put it anywhere. All nozzles should be wrapped with plastic sheets and stacked indoors as far as possible according to the system number. If the conditions do not allow stacking outdoors, it is necessary to pay attention to placing stow-wood under the air duct, and have reliable rain, sand and sun protection measures.