Introduction
The document introduces the new Xpelair range of fume handling units designed for educational, research, and industrial environments. These units are typically installed at the duct's extract point to maintain negative system pressure and are suitable for aggressive atmospheres, including those with airborne chemical contamination.

Specifications
The Xpelair Scroll units feature a polypropylene housing, inlet sleeve, and turbine. The motor is IP55 protected with Class F insulation, and the units come with a mounting bracket for easy installation. Smaller units are single-phase, while larger ones are three-phase, with both versions available for order.

Applications
These units are designed for corrosive fume extraction in environments like fume cupboards, laboratory cabinets, and process extract systems. They are suitable for airflow temperatures up to 60ºC and can be installed externally using a galvanized steel motor pad mount.

Models and Performance
The document lists several models (XSFD125-32 to XSFD400-34) with varying specifications such as inlet spigot diameter, airflow rates at different pressures, nominal fan speed, electrical power, and weight. The units are three-phase with sound power data provided for each model.

Key Features
The units have anticorrosive UV-stabilized polypropylene housing and dynamically balanced centrifugal fans. They are equipped with continuously rated capacitor start and run motors, suitable for external applications with a 400-415V three-phase 50Hz electrical supply.

Sound and Performance Data
Sound power level spectra and free field sound levels are provided, measured at a specified distance. Performance graphs illustrate airflow against static pressure for different models.

Dimensions
Detailed dimensions for each model are provided, including measurements for installation and attachment to ductwork.

Accessories
Xpelair offers a range of accessories, including controllers and ducting accessories, for easy selection. Custom solutions are available through the Xpelair CustomVent Division.

Conclusion
The Xpelair Scroll XSFD units are versatile and robust solutions for fume extraction in various settings, offering a range of models and customization options to meet specific needs.