See all forum discussions about NC-v4 EQc1
 Subscribe to new posts about NC-v4 EQc1 Post a new question aboutNC-v4 EQc1
See LEEDuser’s guidance on NC-v4 EQc1»
FAQs about EQc1 :

Do I have to achieve Option 1 if I want to pursue Option 2?

Has the pressure differential requirement of at least 5 pascals for LEED 2009 EQc5: Indoor and Chemical Source Pollutant Control been eliminated from the requirement of this credit?

How can a Core & Shell (CS) project to comply with the credit requirements if they are not in the project scope?

View answers »

Forum discussion

NC-v4 EQc1:Enhanced indoor air quality strategies

Cross-contamination prevention: dedicated exhaust system still required?

Hi,

In order to achieve EQc1 - option 1 do I still need to intall dedicated exhaust systems to all spaces where are hazardous gases are present? In LEED v2009  (IEQc5) this was mandatory. However, in LEED V4 (EQc1 - option 1), I am not seeing this requirement. Please clarify if this is stil mandatory or not on LEED v4.

Thank you all in advance!

0
Post a reply

You rely on LEEDuser. Can we rely on you?

LEEDuser is supported by our premium members, not by advertisers.

Go premium for $15.95  »

Wed, 01/09/2019 - 12:09

Hi all! Does anyone have any news regarding the above matter? Thank you in advance!
Profile picture for user sgraham_1
Stephanie Graham
Sustainability Manager
Burns & McDonnell
LEEDuser Basic Member
24 thumbs up

Wed, 01/09/2019 - 15:20

If you read the detail in the v4 reference guide, the Enhanced IAQ Strategy credit still requires negative pressure and exhaust with no recirculation of the air from these spaces.  Under the credit it also addresses stacking these locations to minimize ductwork and locating them close to an exterior wall.  From this information I infer that the exhaust must be to the outdoors.

Wed, 01/09/2019 - 15:33

Hi Stephanie and thank you for your answer. That is true, but it is only a sugestion for energy economy. If this part of the credit only requires for negative pressure, may the exhaust system also exhaust air from other spaces (office, per example)? My question is: is it MANDATORY to have a DEDICATED exhaust ventilator per space with hazardous gases (or one system per group of spaces with the same contaminant)? Hope I made myself clear, Thank you all in advance!  
Profile picture for user sgraham_1
Stephanie Graham
Sustainability Manager
Burns & McDonnell
LEEDuser Basic Member
24 thumbs up

Wed, 01/09/2019 - 17:28

As long as it exhausts to the outdoors, the exhaust can be combined with exhaust from other spaces.  This is allowed.  Example:  often the janitor closet exhaust is exhausted with the toilet room exhaust.

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.