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NC-v4 EQp1:Minimum indoor air quality performance

Monitoring Device for IAQ

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Dang Thi
ESD Engineer
GreenViet Consultancy Company
LEEDuser Basic Member
3 thumbs up

Hi,

I have an issue about monitoring device for constant volume system. In the credit language, for constant volume system, it require install a current transducer on the supply fan, airflow switch, pressure transducer.

My question is the monitoring only feedback signal of status different pressure (after and before filter) to BMS in case we use Primary Air Handling Unit without ALARM? 

OR monitoring device must be ALARM when different pressure higher than setpoint?

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Dave Hubka
Practice Leader - Sustainability
EUA
LEEDuser Expert
510 thumbs up

Wed, 07/01/2020 - 20:15

For constant-volume systems, balance outdoor airflow to the design minimum outdoor airflow rate defined by ASHRAE Standard 62.1–2010 (with errata), or higher. Install a current transducer on the supply fan, an airflow switch, or similar monitoring device. Alarms, on constant volume systems, are not required - per the reference guide language. This was an oversight when creating the LEED reference guide, and I do not believe this has been corrected yet.       
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Dang Thi
ESD Engineer
GreenViet Consultancy Company
LEEDuser Basic Member
3 thumbs up

Thu, 07/02/2020 - 01:10

I think it's non-sense when an airflow switch only output signal on or off without do anymore; a current transducer is only give mili Volt of flowrate without convert to alarm signal! On the LEED v4.1 is also similar to v4. They don't give more detail  for constant volumne.
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Dave Hubka
Practice Leader - Sustainability
EUA
LEEDuser Expert
510 thumbs up

Thu, 07/02/2020 - 13:57

Project teams can always go beyond the minimum requirements of the prereq/credit language.  GBCI will not deny prereqs/credits because requirements were exceeded. Good Luck!  

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