ACFM to SCFM
  Insert flow  ACFM
  Insert pressure  inches Hg (negative for vacuum)
 inches H2O
 psig
  Insert air temperature °F
  Insert altitude feet
       Flow rate = SCFM
 SCFM to ACFM
 Insert flow SCFM
 Insert pressure inches Hg (negative for vacuum)
 inches H2O
 psig
 Insert air temperature °F
 Insert altitude feet
 Flow rate= ACFM
 Insert stack ID Inches
 stack velocity feet per minute
 rev 2-8-18
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