“Whirly Birds” - GHDonline“Whirly Birds” aka Turbine Vents Room Volume= 3m x 5m x 2.7m = 40...

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“Whirly Birds”aka Turbine Vents

Wind = 15 km/h (9.3

mph)

Diameter = 30 cm (12 in)

Flow = 1,489 m3/h (876

cfm)

Wind = 25 km/h (15.5

mph)

Diameter = 30 cm (12 in)

“Whirly Birds”aka Turbine Vents

Room Volume = 3m x 5m x 2.7m

= 40 m3

ACH = Flow Rate / Room

Volume

= 1,489 m3/h / 40 m3

= 37 ! ! !

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