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High Performance HVAC Forum > General Category > Duct Work > Roof Cowls
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Author Topic: Roof Cowls  (Read 510 times)
mk01
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« on: July 27, 2009, 07:43:26 AM »
Sirs,

Thanking you in advance for your help.

Two fans are drawing air in through a single roof cowl. The fans are located 25ft from the cowl. Air velocities on the same side of the cowl range from 10FPS to 35FPS due to turbulence. Fans are operating at the limit of their range. Can anyone recommend a fitting for the cowl or duct to help eliminate this turbulence.

MK01
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