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    • 3 July 2012 at 7:04 pm #31704
      Anonymous

        Does anyone know why the outdoor ventilation rate went up to 10l/s from 8l/s ?

        Trying to get my head around it and it'd be nice to know if there was a specific intervention or reason for this change.

        Cheers

      • 4 July 2012 at 9:29 am #38604
        David Olivier

          I can't see a reason

          Some people have designed for 8 l/s.cap for years or even lower if the occupation at that density is intermittent.

          If you design a system with poor ventilation efficiency you need more than 8, it's regrettable if this has been factored into Part F.

        • 7 July 2012 at 10:10 pm #38605
          Mark Siddall
          Participant

            EN 15251 suggests a range of ventilation standard depending upon desired IAQ. The range covers 4 l/s/person to 10l/s/person for domestic and non-domestic. The change may also be supported by the BRE studies into indoor VOC emissions. Could this have influenced matters? who knows?

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