Smoke tightness

Description and standards

 

Smoke tightness S is the component’s ability to reduce or eliminate the transmission of a gas or smoke from one side of the door to the other. The following performance levels are defined:

 

Sa relates to smoke tightness at ambient temperature only.

Sm relates to smoke tightness at ambient temperature and at 200 °C.

 

In the case of fire-resisting components, S must be added to the fire resistance classification (e.g. EI2 60 – Sm).

 

  • Smoke tightness Sm – when the maximum flow rate measured at one of the temperatures (ambient and 200 °C) and up to a pressure of 50 Pa does not exceed 20 m³/h for a single-leaf door set or 30 m³/h for a double-leaf door set.
  • Smoke tightness Sa – when the maximum flow rate measured at ambient temperature and at a pressure of less than or equal to 25 Pa only does not exceed 3m³/h per metre in clearance length between the door set’s fixed and mobile components.

Combination of performance features

Thanks to their modular structure based on Metal+, Heinen smoke tightness products can also have other performance features combined and added to them, such as: