In case of fire the natural smoke and heat exhaust ventilator (NSHEV) or smoke extraction domes / hatches are designed to remove combustion products outside the building with the aim of providing a smokeless layer on the floor to evacuate people.
Facade pneumatic NSHEV are windows from aluminum profile with pneumatic opening system, pneumatic cylinder and mechanical lock.
NSHEV must be CE certified and CE marked according to EN12101-2 by a notified laboratory.
Advantages of the facade pneumatic NSHEV: achieving larger opening angles and a cheaper control system.