Hello,
I was wondering if the design team must specify CO2 sensor and outdoor air flow measurement devices for tenanted areas too ? Or do these requirements only target C&S occupied areas ?
Our project is a Core & Shell office and it is not known which areas will serve as conference room, private offices or open plan office. It will all depend on the future tenant layout.
Many thanks,
Allison Zuchman
Green Building ConsultantFore Solutions
34 thumbs up
September 17, 2010 - 8:11 am
CO2 sensors and outdoor air flow monitors are not required in tenant spaces that are not within this scope of work. However the base building mechanical system must be designed so that these sensors can be added during the tenant fit-out. It is recommended to include requirements for monitoring devices in tenant guidelines or lease agreements.
Maya Karkour
EcoConsulting872 thumbs up
September 17, 2010 - 10:21 am
Hi Allison,
Many thanks for the reply.
We will definitely include the requirement in Tenant Guidelines, but could we get the point even if all main occupied areas are tenanted?
The only place I could think of that would be considered "occupied" and C&S is the entrance lobby. Would that be enough to get the credit ?
Thanks,
Allison Zuchman
Green Building ConsultantFore Solutions
34 thumbs up
September 21, 2010 - 2:25 pm
Sorry for not getting back to you sooner. I would think that you can get the credit with your scenario above, though I am not absolutely positive. I know in CS 2.0 you could get the credit by obligating all tenants through lease agreements to follow the credit requirements, but I have not yet submitted a CS 2009 project. I did a little searching and it is a bit vague whether that path is acceptable for CS 2009. I would think so, but maybe submit a CIR to be sure?
Maya Karkour
EcoConsulting872 thumbs up
January 12, 2011 - 11:06 am
Hi Allison,
So I followed your advice and submitted this as a CIR. The following is the answer I got from the USGBC:
"The applicant is requesting clarification regarding compliance with the credit for spaces with tenant fit out. The applicant notes that it is not yet clear which spaces will be densely occupied. Details for Core and Shell projects with tenant fit out spaces can b e found under the Core and Shell Appendix 4 of the LEED Reference Guide for Green Building Design and Construction. Outdoor air flow measurement devices are required for all mechanical ventilation systems serving the Core & Shell project unless the Core and Shell scope of work includes installing CO2 monitoring for each regularly occupied area in the space. 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.
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Note the following in their answer: "Outdoor air flow measurement devices are required for all mechanical ventilation systems serving the Core & Shell project unless the Core and Shell scope of work includes installing CO2 monitoring for each regularly occupied area in the space". In my opinion, this means that we only need to install the CO2 sensors and Outdoor measurement devices in C&S areas only. They do not mention the need to have a tenant lease agreement requiring tenants to install CO2 sensors and outdoor measurements devices. I welcome your comments on this.
Val Fan
2 thumbs up
May 24, 2011 - 6:24 am
When it is mentioned: "Outdoor air flow measurement devices are required for all mechanical ventilation systems serving the Core & Shell project", does it mean we shall install these devices for each AHU or each end-user devices (such as Chilled beams) ? Thanks
Petra Hajná
Sustainability ConsultantSkanska Czech Republic
189 thumbs up
October 27, 2011 - 2:16 am
Val,
you only need to install those devices for AHUs providing at least 20% air supply to nondensely occupied spaces.
Lucie Cervena
Ekowatt CZ13 thumbs up
May 31, 2012 - 9:13 am
Hi George,
in our project all the mechanical ventilation systems serving tenant office spaces are equipped with the outdoor air flow measurement devices. In tenant sales and lease agreement there will be requirement that in all of the densely occupied spaces (meeting rooms and open offices) the tenants must install CO2 sensors. We have an office building with 5 floors of tenant office spaces with the same floor area and the final layout is not known. Is it sufficient to provide representative floor plan for one - the most probable tenant layout with the CO2 sensors location or is it necessary to provide plans of all of the floors to show compliance?
Thanks!