The flexible air duct Dalap ALITSONO with a diameter of 250 mm and length of 10 m is thermally insulated & sound-absorbing and therefore predestined for locations with requirements for enhanced sound insulation such as educational centres, kindergartens, hospitals or spa centres. The insulated aluminium flex duct is used, for example, as a connection to ventilation systems such as kitchen extractor hoods, heat recovery or air conditioning systems.
The air duct Dalap ALITSONO 250/10 consists of micro-perforated, polyester-laminated aluminium foil, reinforced with a spring spiral made of carbon steel and a 25 mm thick insulation layer of mineral wool. It is suitable for temperatures from -30 °C to +140 °C, with a velocity of 30 m/s and a pressure of 2500 Pa.

Technical data
| Diameter [mm] |
250 |
| Length [m] |
10 |
| Max. pressure [Pa] |
2500 |
| Weight [kg] |
9 |
| Dimensions [mm] |
see image |
| Material |
Aluminium, mineral wool |
| Fire resistance |
yes |
| Operating temperature [°C] |
-30 to +140 |
| Colour |
silver |
| Air ducts |
yes |
| Version |
flexible duct with insulation |
| Model |
ALITSONO 250 |