Introduction
The document emphasizes the critical role of Natural Smoke and Heat Ventilators (N.S.H.E.V) in enhancing safety during fires by facilitating smoke evacuation, thereby reducing fatalities from smoke inhalation. It references standards UNI 9494 and UNI EN 12101-2:2004, which govern the construction and installation of these systems.

CAODURO Products
CAODURO offers a variety of N.S.H.E.V systems under the brand SMOKE OUT, featuring both manual and remote control options. These systems are designed for extreme conditions, utilizing CO2 or nitrogen cylinders for energy supply, and are praised for their simplicity, reliability, and cost-effectiveness.

N.S.H.E.V for Roofs
The SMOKE OUT roof ventilators are CE marked and certified according to UNI EN 12101-2:2004. Available in multiple sizes, they are suitable for various roofing types, robust enough to operate in adverse weather, and can be integrated with electrical openings for ventilation.

Performance and Qualification Requirements
Performance metrics include wind load (WL 1500), reliability (Re 50), and heat resistance (B300). Material classifications are specified as PMMA Euroclass E and PC BS1D0.

Dimensions and Motor Positioning
Tables provide detailed dimensions for square and rectangular sections, indicating nominal net light, external supports, and additional electrical opening types.

N.S.H.E.V for Walls
The SMOKE OUT VERT systems for walls comply with the Construction Products Directive and are certified under UNI EN 12101-2:2004. They feature a vertical frame with pneumatic actuation, designed to withstand extreme weather conditions.

Control Systems
Various control systems are described, including manual and automatic remote controls. The MINI-ENERGY system is highlighted for being resettable and immune to electromagnetic interference.

Specifications
N.S.H.E.V. systems are designed to control the simultaneous opening of ventilators in a single compartment, with a maximum of 10 per line. The central unit includes a 24V network current transformer and backup batteries, supporting up to 160 actuators, and is compatible with central smoke and heat detection units.

System Types
Opening systems include:

Standards and Compliance
The systems comply with the UNI EN 12101-2:2004 standard, which supersedes the older UNI 9494 standard. The new standard mandates CE marking and includes rigorous testing for reliability, opening under load, low temperature, wind load, and heat resistance.

Ventilator Specifications
The document details the construction and components of N.S.H.E.V. for roofs and walls, including materials like galvanized steel and polycarbonate, and features such as pneumatic cylinders and actuators with MINI-THERMAL and MINI-ENERGY units.

System Sizing
Sizing of N.S.H.E.V. systems is based on the Total Usable Surface (SUT) required, as per UNI 9494:2007. Designers must ensure the Usable Opening Surface (Aa) meets or exceeds calculated requirements.

Retrofitting and Modernization
The document discusses adapting existing buildings to current standards, offering solutions like prefabricated upstands for old roofing and ventilation opening devices for retrofitting.

Conclusion
CAODURO® provides a range of N.S.H.E.V. systems that meet European standards, ensuring high performance and compliance with safety regulations.