Thursday, December 3, 2009

Duct Sizing

  • Medium pressure duct: Size at 0.2 (Friction) then verify that Velocity is at or below 2000 FPM
  • Low pressure duct: Size at 0.08 (Friction) then verify that Velocity is at or below 750 FPM
  • When possible, keep duct size ratio a minimum of 3:1

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