Forum discussion
NC-2009 IEQp1: Minimum IAQ Performance
A couple of our readers posted questions in this space asking for specific guidance on applying IEQp1 in international settings, dealing specifically with ASHRAE-62 issues. I apologize, but those comments were deleted due to "pilot error" on my part.
I've asked a couple of our esteemed experts to weigh in on this topic in general, and I also invite readers to post new comments, or re-post previous questions.
Thanks, and I apologize for the error.
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Is outdoor air quality testing required in a space using natural ventilation?
What options are available to projects outside the US to meet this prerequisite?
Can LEED 2009 projects elect to follow ASHRAE 62.1-2010 for this prerequisite?
Which units should be included in the calculations for this prerequisite?
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11477 thumbs up
January 29, 2010 - 6:58 pm
One of our consultants emailed me the following about doing this credit internationally:
The issues that can be problematic on international projects pertain primarily to natural ventilation strategies. Natural ventilation is not addressed adequately by ASHRAE 62 criteria (which establishes distance and window/area ratio requirements), particularly for projects that base substantive natural ventilation design on other criteria, such as "effective opening" area to floor area, using various (and often combined) types of ventilation, such as thermal chimneys, etc.
Also, it bears mentioning that many countries have higher volume ventilation requirements than ASHRAE 62, but equivalence comparisons are sometimes required since ASHRAE 62 can be unfamiliar to non-Americans.
Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
February 11, 2010 - 1:35 am
Putting in the 4% effective opening area to floor area also by no means garantees successful natural ventilation. That's why it is usually accompanied by the AM10 supporting documentation or a simulation: multi-zone nodal bulk air flow &/ CFD