A selection of LEV (local exhaust ventilation) calculators to help designer/supplies of LEV to work out conversions, averages, volume flow, air change rate, air density and air velocity.
Tuesday, June 24th, 2008 I 
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A selection of LEV (local exhaust ventilation) calculators to help designer/supplies of LEV to work out conversions, averages, volume flow, air change rate, air density and air velocity.