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If my project is using air handlers that supply 100% outside air at a constant volume, do I still need to install an airflow monitoring device?

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NC-2009 IEQc1:Outdoor Air Delivery Monitoring

VOC instead of CO2 sensors

the designer suggests to use VOC sensors instead of CO2 sensors in a number of lunch rooms and the smoking room. The VOC sensors do not directly measure CO2 but calculate a CO2 equivalent by an "internal algorithm". This is clearly not directly compliant and I cannot find any interpretations about that. I would say that this would be compliant nonetheless. The VOC measurement / CO2 equiv. calculated will always be same or higher than the actual CO2 levels. Any views / comments on that? Thanks, Jens

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Wed, 06/14/2017 - 14:10

If your VOC sensors are certified to provide CO2 measurements at an accuracy that is acceptable to LEED, then use them. If not, I cannot see USGBC accepting your solution.

Thu, 06/15/2017 - 13:40

Hm, I think I will submit a CIR to make sure. Btw, I can't find required accuracies for the CO2 sensors, only for air flow measurement.

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