I'm trying to get an idea of where CO2 sensors would be required on a project. It is an office building with one AHU per floor and one for a fitness center. The building contains several densely occupied spaces (conference rooms and the fitness center).
It is unlikely that any of the AHU's are predominantly serving densely occupied space (except for the fitness center AHU). Assuming that this is the case, I believe that the fitness center is the only space that would require a CO2 sensor. Is this correct?
Hannah Bronfman
Senior Associate99 thumbs up
February 21, 2012 - 5:08 pm
Michael
From my understanding, you will need to take the following approach to meet the credit requirements:
For each AHU, you will need to determine if the densely occupied areas make up 5% or more of the total floor area for that floor. If this is true, then you will need to install CO2 sensors in all of the densely occupied spaces served by that AHU. If not, then there is no need to install CO2 sensors on that floor.
I would take this approach for each AHU and then provide a table showing the 5% rule and if it's applicability for each AHU as a part of your supporting documentation.
Hope this helps,
Hannah
AshLee Eustace
Sales and Marketing Executive AssistantSustainable Solutions Corporation
46 thumbs up
February 22, 2012 - 8:09 am
There is still some confusion on my end; reading through the reference guide, it seems that Case 2 is only applicable when an AHU is predominantly serving densely occupied spaces. But from reading on here, it looks like Case 2 is applicable in all cases where the densely occupied spaces account for >5% of total occupied building area.
Hannah Bronfman
Senior Associate99 thumbs up
March 2, 2012 - 11:58 am
The safe bet here is to apply the 5% rule and put sensors in all of those densely occupied spaces in your building. I'd especially urge you to go this route because I'd hate to see the credit denied after a large financial investment is made. Let me know how else I can help.
AshLee Eustace
Sales and Marketing Executive AssistantSustainable Solutions Corporation
46 thumbs up
April 10, 2012 - 2:42 pm
We found a CIR regarding this: "All densely occupied spaces must include CO2 sensors. If the AHU predominantly serves densely occupied spaces, outdoor airflow measurement at the AHU is not required. If the AHU predominantly serves non-densely occupied spaces, outdoor airflow measurement at the AHU is required, in addition to CO2 sensors in the densely occupied spaces."
Alexa Stone
ecoPreserve: Building Sustainability134 thumbs up
June 1, 2012 - 12:50 pm
I've tried to answer this for my self with your conversation, but are there exceptions to these rules for densely occupied spaces that go through various configurations with air/movable walls (ie ballrooms). It would be impossible and ineffective to install sensors on temporary walls. the ceiling would be the only logical place but that is out of the breathing zone
Rasita Masalskyte
MsVesta Consulting
5 thumbs up
March 15, 2017 - 2:01 pm
Regarding the above ruling (http://www.usgbc.org/content/li-1642) - it has been issued for LEED ID+C v2. I wonder if it is still applicable for EBOM v2009?