With KEN-LOK Spiralo ducts and fittings airtightness class ATC2
In accordance with NEN EN 1506 and 12237 and the Building Decree of 2012 stipulates a maximum noise level of 30db(a). As a result, the airtightness and noise-dampening properties of ventilation systems play a decisive role in building specifications. Due to its rubber seals, a ventilation system made using KEN-LOK Spiralo ducts and fittings is quiet and meets the requirements of airtightness class ATC2 (formerly class D).
International airtightness classes ATC5 to ATC2 (formerly known as classes A to D)
The acceptable amount of air leakage is related to classes of airtightness. The test pressure used is derived from the NEN EN 1506 and 12237 standards.
Airtightness class ATC5 (formerly class A) has the most air leakage. Airtightness class ATC2 (formerly class D) has the least air leakage.
International airtightness classes ATC5 to ATC2 (formerly classes A to D)
Current class | Former class | Leakage factor | Max test pressure (Pa) |
ATC5 | A | 0.027 | 500 |
ATC4 | B | 0.009 | 1000 |
ATC3 | C | 0.003 | 1000 |
ATC2 | D | 0.001 | 2000 |
