Non-insulated air ducts Polyvent 665-Comby series

Description

• Flexible heavy-duty air duct from multilayer aluminium foil, polyether and PVC with high-carbon steel wire frame.

Features

Versus PVC foil air ducts:

• High temperature resistance;
• non-flammable internal layer, fire safety class M0 (up to 250 °С) or M1 (up to 150 °С).

Versus aluminium foil air ducts:

• High rupture resistance;
• better protection against outside mechanical impact;
• airtight, expansion- and deformation resisting.

Recommended application

• Applied in residential ventilation and air conditioning systems of living quarters, administrative and public premises.

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.