The CTE in the Basic Document of Health (DB-HS) indicates that homes must have a general ventilation system and must be equipped with inlet openings that guarantee air circulation in order to ensure the quality inside. Consider a stuffy room is much more harmful than we might think, the cumulative CO2 respiration, cooking fumes, fumes from cleaning products, etc.. in poorly ventilated cause great damage to our health when breathed and continuously unwittingly. The aluminium doors and windows and tilt and turn both PONSICO s.c.p. practicable includes a mechanism for rotating the handle about degrees allows an opening of 4 mm, thus allowing passage of air required and necessary to stay. Furthermore, this mechanism provides the necessary security for the enclosure is kept locked and impossible to open from the outside when powered. This mechanism consists of a piece eccentric, which regulate it get a higher or lower air passage. This system is enclosed by the mechanism built by manufacturers of hardware as Giesse, which we think is more than enough, but also can incorporate a specific hardware for this purpose. For any queries please contact us, we will respond without compromise.