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  1. SiteJanny

    Combining Lab Extract or General Ventilation Duct with Local Exhaust Ventilation Duct

    Thanks for your input guys @urgross - I'd noted the NFPA 45 comment about manifolding from the same Lab. But my concern lingers largely because of the difference between the term 'exhaust' and the term 'extract'. Further, I also have a mental block over the term 'Laboratory Unit'. I may be...
  2. SiteJanny

    Combining Lab Extract or General Ventilation Duct with Local Exhaust Ventilation Duct

    Can anyone advise me if it is acceptable practice to combine Lab Extract or General Ventilation duct, with an LEV exhaust duct? I'm conducting a review of proposed LEV installations in a new Hospital under construction, and most of the exhaust ducts for the various LEV's appear to take...

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