See all forum discussions about EBOM-2009 IEQp1
 Subscribe to new posts about EBOM-2009 IEQp1 Post a new question aboutEBOM-2009 IEQp1
See LEEDuser’s guidance on EBOM-2009 IEQp1»
FAQs about IEQp1 :

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?

View answers »

Forum discussion

EBOM-2009 IEQp1:Minimum IAQ Performance

Related to 62Mz Calc

On the requirements of this prerequisite it says " Each air-handler must be measured; sampling or grouping of air-handlers is prohibited"; If I have three AHU's working for the same zone how can I calculate each one? I have only one area and a number of people for the zone. Is there a way to calculate each one? Help! Thanks in advance.

4
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  »

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

Mon, 02/20/2012 - 15:15

You could assign a sub-portion of the zone (space and people) to each AHU and run the calculations that way. The apportioned spaces to each AHU can be based on what makes the most sense given the system design.

Wed, 02/22/2012 - 14:31

And if I have several AHUs that are back-up, do I need to make the calculations also?
Profile picture for user bstanley
Ben Stanley
Senior Sustainability Manager
WSP - Built Ecology
LEEDuser Expert
188 thumbs up

Wed, 02/22/2012 - 16:51

It sounds like you need to determine what the worst-case scenario is for ventilation in the applicable space and then run the calculations and outside air testing accordingly. If the back-up AHUs run during the worst case scenario then they should be included. The worst case scenario is generally highest occupancy during typical operations and lowest amount of outside air to the space. This often occurs during heating season but that is not always the case.

Add new comment

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