Non-insulated air ducts Polyvent 661 series

Description

• Flexible PVC air duct with spiral high-carbon steel wire frame.

Features

• Low pressure loss due to increased wall rigidity.
• Long service life.
• Heavy-flammable, flame-retarding, self-extinguishing.

Recommended application

• Applied in residential and commercial ventilation systems.
• Recommended for use in office premises, trade and recreational buildings, etc.

Pressure loss diagram per 1 m stretched air duct

Calculation example:

1. Select a curve that matches the air duct diameter [mm], 200 mm in this case.
2. Find the intersection point of this line with the vertical line of the required air flow in m³/h, 500 m³/h in this case.
3. The horizontal line that shows the pressure loss in Pa per 1 m straight air duct crosses this intersection point.
4. Multiply pressure loss value (2.4 Pa/m at 20°С) by total air duct length to get the total pressure loss value. To calculate pressure loss in case of bends consider each bend as extra air duct meter.