IEQp1 form v06 has a new requirement to describe "how critical zones are selected and how all occupiable zones are accounted for in the determination of the critical zone. A critical zone is defined as the zone which requires the largest fraction of outdoor air in the primary air stream." Is this mandatory for 100% outside air systems or only for VAV systems? In addition, there is little reference to critical zones in 62.1-2007 standard. Thanks in advance.

Post a reply

Dionisio Franca

Director

Woonerf Inc.

LEEDuser Basic Member

31 thumbs up

Wed, 11/02/2016 - 00:49

Hi Charalampos, The new calculator from USGBC is good to help understanding the different types of zone systems: http://www.usgbc.org/resources/minimum-indoor-air-quality-performance-calculator There are multiple zones, 100% OA, and single zones. Only multiple zones will require you to determine the critical zone. If you input all zones on a multiple zone calculator, the calculator will automatically look for the critical zone. You can find an example of how to find the critical zone in the 62.1 user's manual: Example 6-M—Finding Critical Zones in Multiple Zone Recirculating Systems . . . . . . . . . . . 6-26 I recommend you get one. It is very helpful.

Add new comment

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

You are currently logged in under an enterprise account

FAQs about IEQp1 :

Critical zone

You rely on LEEDuser. Can we rely on you?

Add new comment