Specifications:
The document provides specifications for various models of ventilation systems, identified by codes such as 2N, 3N, 4N, 5N, 6N, 2H, 3H, 4H, 5H, and 6H. Each model is characterized by parameters such as air flow rate (m3/h and c.f.m), number of fans and pumps, power (Hp/Kw), and dimensions including total height, width, depth, and working height.

Procedures:
The document does not explicitly outline procedures but provides technical specifications that imply installation and operational guidelines based on the dimensions and power requirements.

Norms and Standards:
No specific norms or standards are mentioned, but the technical details suggest adherence to industry standards for ventilation systems.

Recommendations:
The document suggests two types of extracting fronts: Zincovelo ZA, which is a single extracting front, and Zincovelo ZB, which includes extended walls and a roof. These options provide flexibility depending on the installation environment.

Key Data from Tables:
The tables list detailed specifications for each model, including:

• Air flow rate (m3/h and c.f.m)
• Number of fans and pumps
• Power requirements (Hp/Kw)
• Dimensions: total height, width, depth, and working height

Critical Information:
Understanding the specific requirements for air flow, power, and dimensions is crucial for selecting the appropriate model for a given application. The choice between Zincovelo ZA and ZB depends on the need for additional structural features like extended walls and a roof.