Specific fan power
The BSRIA guide to 'Commissioning Air Systems' (BG 49/2024), written by by Keith Barker and published by BSRIA in March 2024, explains how to commission ducted air distribution systems in buildings. It was originally published in 2013, then 2015 with the latest update in 2024.
For the purposes of the guide it defines specific fan power as: 'A measure of the electric power that is needed to drive a fan (or collection of fans), relative to the amount of air that is delivered through the system. This is expressed as watts per litre per second (W/(l.s)).'
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