Powered flow hood
Commissioning Air Systems (BG 49/2015), written by Chris Parsloe and published by BSRIA in March 2015, explains how to commission ducted air distribution systems in buildings. It was originally published in 2013 and was then updated in 2015.
It states: ‘Powered flow hoods are designed to minimise back pressure and turbulent flow effects. The instrument incorporates a fan which rotates at a controlled speed to achieve a zero pressure balance in the hood itself. As soon as the zero pressure state is achieved the instrument displays the corresponding flow rate.’
--BSRIA
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