Fan application guide (TM42)

Paul Cowell, Geoff Lockwood, Ron Mulholland, Ian Davis, Colin Biggs, Ian Andrews, Dan Hopkin

• Publisher: The Chartered Institution of Building Services Engineers
• Year: 2006
• eBook ISBN: 9781903287682
• Topic: Technology & Engineering
• Subtopic: Construction & Architectural Engineering
• Index: Technology & Engineering

A person's health can be seriously impaired by inadequate ventilation — the quality, temperature and movement of the air. Condensation and the growth of mould is a risk to buildings. Air freshness should be controlled with the removal of odours, pollutants and excessive moisture. The essence of the correct air motion is a matter of identifying the correct system, selecting the correct terminations, controls and duct routing and, perhapsmost importantly, selecting the correct fan. It is a common perception that the fan is simply an air extraction device; a tool to move air between given points, e.g between the bathroom and outdoors. Fans are not only used to enhance personal comfort and well-being. Many uses of fans go unnoticed such as cooling a personal computer or the special fans used to extract hazardous fumes from industrial processes.This revised and updated Fan application guide considers the principles of air movement and the various fan types available in order to achieve the best results. The authors are all engineers with considerable experience in the fan industry. In the following pages, they discuss the principles and practice of air extract/supply system design, and offer guidance on fan selection to ensure that such systems perform their intended function efficiently.This publication has been produced not for the fan engineer but for the engineer who uses fans. It is aimed not only at specifiers, mechanical services designers and architects but also at those responsible for building services and plant maintenance.The contents are not exhaustive and it is strongly recommended that designers consult the fan manufacturers before finalising the design. If this were done more frequently there would be less need for this guide!

Table of contents

• TM42 Fan application guide OFC
• Foreword
• Contents
• 1 How a fan works
• 2 Fan laws and system resistance
• 3 Fan selection
• 4 Installation and system effects
• 5 Fan control
• 6 Parallel and series operation
• 7 Acoustics
• 8 Safety and maintenance
• Appendix 1: Definitions and explanations
• Appendix 2: Airflow and pressure measurement
• Appendix 3: Information required for fan selection
• Appendix 4: Electric motors
• Index