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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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CS-2009 IEQc1:Outdoor Air Delivery Monitoring

NO DENSILY OCCUPIED SPACE IS AT OUR PROJECT

Our project is a CS building with only a few areas within the reach of control of de developer, basically the building staff offices and they will never reach 25 people per 1000 sqft. Does this mean that we are not required to install the CO2 censor at occupied spaces and by only providing the outdoor aire delivery monitoring will achieve the credit? I was thinking having the owner signing a document stating that, in case the density of the CS building increases this CO2 monitors will be installed but for now since we do not have any densily occupied space no CO2 monitor will be on the project.

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Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Fri, 12/14/2012 - 18:25

Michael, if there are no densely occupied spaces, then you do not need CO2 sensors to earn the credit. However, a CS building typicaly needs a tenant lease agreement to earn this credit—see CS Appendix 4 in the LEED Reference Guide.

Mon, 12/17/2012 - 07:48

Tristan, doesn't the lease agreement refer only to the outdoor air flow monitoring in case the tenant is in charge of installing his own ventilation system? I understood that we don't have to require tenants to install their own CO2 sensors.
Profile picture for user tristanroberts
Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Mon, 12/17/2012 - 14:15

Adam, where did you get those ideas?Keep in mind this is a credit and thus optional. If you don't plan to meet the requirements, then you don't need to try to earn the credit.

Mon, 12/17/2012 - 15:14

I got these ideas from the section "Checklists" above that says: "CO2 sensors are not required in tenant spaces that are not included in the scope of work for the LEED project. However, in order to achieve credit compliance, the base building’s mechanical system and BMS must be capable of incorporating CO2 sensors into future tenant fit-outs." I got those ideas also from some comments below. One of them (the discussion started on Sep 14 2010) is quoting a CIR answer: "Per the LEED Design and Construction Reference Guide, project teams may want to design control systems with the capability for future expansion to allow CO2 monitoring for densely occupied spaces; however, this is not required for compliance with this credit under the LEED Core & Shell rating system". That is why I asked this question. The reference guide is not always clear about some requirements and very often I can hear different opinions from different people.

Tue, 12/31/2013 - 15:15

Adam, I have seen the same. Review comments have stated that you do not need to require tenants to install CO2 sensors in densely occupied spaces. However, you do need to ensure that your building automation system is equipped to monitor future tenant CO2 sensors and sound an alarm if levels vary from design. Also, if future tenants will be installing their own air handling units with outdoor air, they would need airflow monitoring stations. This would need to be included in your tenant lease.

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