Catalogue Overview
This document provides an overview of the FREvent and ETAvent systems by Ziehl-Abegg, highlighting their specifications, technical descriptions, and applications. The catalog is available for download on the company's website, and printed versions can be requested.

Copyright and Usage
The entire content of the catalog is copyrighted by ZIEHL-ABEGG AG. It is intended for personal use and cannot be shared or published without written consent.

General Information
The catalog contains information and data compiled to the best of the company's knowledge. Users are responsible for verifying the suitability of products for their intended applications. ZIEHL-ABEGG reserves the right to make design changes for technical improvements. Updates and corrections are regularly posted on the website.

Technical Specifications
The document includes detailed technical specifications for various fan models, including axial and centrifugal fans. It provides characteristic data, noise levels, and performance curves necessary for selecting the optimal product.

System Comparison: FREvent vs. ETAvent
Both systems utilize Ziehl-Abegg's proven external rotor motors. FREvent systems feature AC technology with integrated frequency inverters, while ETAvent systems use EC motors with integrated controllers for higher efficiency. FREvent is cost-effective for lower operational hours, whereas ETAvent is more efficient for high operational hours and higher speed ranges.

Product Range
The catalog lists a comprehensive range of products, including axial fans, centrifugal fans, external rotor motors, and control technology. It emphasizes the company's expertise in providing tailored solutions for various applications.

Company Background
Ziehl-Abegg, founded in 1910, is a leader in ventilation and air conditioning technology. The company employs over 2000 people worldwide and is known for its innovative solutions and customer-focused approach.

Overview
The document provides a technical description of the FREvent and ETAvent fan systems, highlighting their design, functionality, and economic efficiency. These systems utilize external rotor motors and are optimized for different applications based on their motor types and sizes.

Specifications
The FREvent system uses AC technology with integrated frequency inverters, while the ETAvent system employs EC external rotor motors with integrated EC controllers. The ETAvent fans are noted for their high efficiency due to the use of neodymium iron-boron magnetic materials.

Economic Considerations
The document discusses the investment and energy efficiency of the fan systems. FREvent fans are more cost-effective in terms of initial investment, whereas ETAvent fans offer better energy efficiency, especially at higher speeds and longer operational hours.

Functionality
Both fan systems with motor size 137 have integrated control functionalities, allowing direct connection with sensors for independent control of parameters like temperature and pressure. They can also be controlled via external signals (e.g., 0-10V).

Accessories
The AXG operation terminals are used for parameterization and control of the fans. The AXG-1A/AXG-1AE is for single fan operation, while the AXG-30AE can manage up to 30 fans, all connected via a bus system.

Axial Fan Types
The document describes various axial fan series, such as FE and VN080, highlighting their design features like crescent-shaped impellers for noise reduction and efficiency. The FE2owlet series is noted for its bionic-inspired design, improving noise behavior and efficiency.

Centrifugal Fan Types
The RH..C, GR..C, and ER..C series are detailed, emphasizing their energy optimization and acoustic performance. These fans are suitable for air conditioning and building system engineering applications.

Technical Data
Common technical specifications include a rated voltage of 3~ 380…480 V, protection class IP54, and an ambient temperature range of -25°C to +60°C. The fans have integrated motor protection and automatic power reduction features.