title: Air-to-cloth ratio
text: The air-to-cloth ratio is the volumetric flow rate of air (m3/minute; SI m3/second) flowing through a dust collector's inlet duct divided by the total cloth area (m2) in the filters. The result is expressed in units of velocity.
  
  The air-to-cloth ratio is typically between 1.5 and 3.5 metres per minute, mainly depending on the concentration of dust loading.
  
  External links
  Details on how to calculate air-to-cloth ratio
  
  Filters
  Engineering ratios