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What if after our Preliminary Review we have to re-work the ventilation rate procedure calculations and find that we need to make corrections to the system in order to meet the prerequisite? Can we redo the outside air testing after making corrections? Wo

What if our systems do not meet the required outside air when systems are tested at worst-case conditions?

Our building has a single fan that supplies outside air to multiple AHU’s. Do we need to perform outside air testing at the supply fan or at all AHUs?

We have a VAV system where single AHUs serve multiple zones. Do we need to take outside air measurements at each VAV box?

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EBOM-2009 IEQp1:Minimum IAQ Performance

10% exemption

Is it allowed to exclude up to 10% of spaces from this prerequisite? Our project is a 20-story building that complies with the ventilation rates but there is an office in the core that doesn't have any ventilation and it is very difficult to get there without spending much money and bothering the tenants.

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Profile picture for user bstanley
Ben Stanley
Senior Sustainability Manager
WSP - Built Ecology
LEEDuser Expert
188 thumbs up

Mon, 05/23/2016 - 22:24

It is acceptable to apply the 10% exclusion to this prerequisite. The only prerequisite/credit that cannot apply the 10% exclusion is IEQp2 (smoking).
Profile picture for user cdavis_1
Christopher Davis
Sr. Sustainability Project Manager
CodeGreen Solutions
LEEDuser Basic Member
25 thumbs up

Tue, 05/24/2016 - 18:43

Yes, the 10% separate-management exclusion applies to this prerequisite, but keep in mind that the 10% threshold applies to the entire tenant space in which a non-compliant room might exist. Based on how this has been enforced in the past, it would not be acceptable to exclude one room in a separately-managed tenant that comprises 15% of the building.

Mon, 01/16/2017 - 11:31

So does the 10% exception rule apply to the whole building area or to a separate tenant's space? I mean if we omit 100% space of a single tenant, but which takes less than 10% of the whole building area, will we comply with this rule?
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Michael Smithing
Director - Green Building Advisory
Colliers International Ltd.
LEEDuser Basic Member
201 thumbs up

Tue, 01/17/2017 - 00:27

The short answer is yes. If you exclude a tenant, you have to exclude 100% of the tenant space. The total area excluded cannot exceed 10% of the building. If you have 2 tenants occupying 5% and 7.5% of the building respectively, you could exclude either tenant but not both tenants.

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