Hi all,
I'm having difficulty understanding what Concentration Limit to apply for Particulate Matter (PM10 and PM2.5) under V4.1 BD+C.
For PM10, does an ISO 14644-1:2015 limit apply in addition to 50 μg/m3 or 20 μg/m3 (Healthcare only) limits?
I was recently advised that PM2.5 only applies to health facilities under V4.1, but I don't see an indication of that in the ratings system or the "Getting started guide for beta participants". Was wondering if someone might be able to confirm.
Lastly, the "Getting started guide" states that "separate U.S. EPA NAAQS thresholds for PM2.5 and PM10 as well as gravimetric test methods for particulate matter are no longer required to be met" (p. 225; my emphasis). However, the PM2.5 Concentration Limits of 12 or 35 μg/m3 (depending on site location outside/inside EPA non-attainment zone) are from EPA NAAQS, are they not?
Any insight would be much appreciated! Thanks very much.
Dan
Agnieszka Rylska
GO4IT SP Z OO SP K30 thumbs up
August 7, 2020 - 9:18 am
Hi Daniel,
Did you receive any feedback for your question? For PM10, does an ISO 14644-1:2015 limit apply in addition to 50 μg/m3 or 20 μg/m3 (Healthcare only) limits?
Collin Robinson
The Sheward PartnershipJune 6, 2024 - 2:31 pm
I had the same question today, and I believe the following is accurate: In the LEED v4.1 reference guide for this credit (Behind the Intent), the ISO 14644-1-2015 test replaces the NAAQS test (PM 2.5 and PM 10). The ISO test reports in different units of particles per m³ rather than the former µg/m³ unit. On a recent project our testing agency informed us of this and provided only ISO 14644 results. The particle sizes tested are 0.5, 1.0, and 5.0 µm (not 2.5 and 10 µm), and the thresholds are to be Cleanroom class 8 or better. That class has separate thresholds for the three particle sizes tested: 3,520,000, 832,000, and 29,300 particles per m³ respectively. Please confirm with the ISO standard. Besides having a MERV 13 filter, I don't know how to translate an outdoor ambient PM 2.5 level from EPA directly to an indoor particles per m³ as tested by ISO. I hope that helps!