IAQ testing credit substitution backwards from 4.1 to 4.0?

Jeff Ross-Bain, PE, LEED Fellow, WELL AP

President

Ross-Bain Green Building

LEEDuser Premium Member

21 thumbs up

Project location :

U.S. and Canada

September 30, 2024

Hi all,

I have heard that some teams have done a credit substitution from a v4.1 (New Construction) project backwards to the v4.0 criteria. I am somewhat skeptical of being able to do this but feel that I had that information from a reliable source. Has anybody out there succussfully made this reverse credit substitution? Thanks.

Post a reply

Dave Hubka

Practice Leader - Sustainability

EUA

LEEDuser Expert

510 thumbs up

Fri, 10/04/2024 - 12:52

A couple years ago I mistakenly selected "v4.1" when registering a project. I asked GBCI if I could pull up v4 credits and their response was "no". So I re-registered the project as v4. Please post if you learn otherwise. Good Luck!

Russ Pellegrino

Technical Director

Centek Laboratories, LLC

LEEDuser Basic Member

13 thumbs up

Fri, 10/04/2024 - 14:43

Don't forget that 4.1 has totally different VOC compounds than V4. If the lab didn't look for all of them then you wouldn't be able to meet the criteria of V4.

Jeff Ross-Bain, PE, LEED Fellow, WELL AP

President

Ross-Bain Green Building

LEEDuser Premium Member

21 thumbs up

Wed, 10/09/2024 - 14:32

Follow up and verifiying Daves comment above, we have received a response from the USGBC: if a project is registered under v4.1 then it is not possible to do a credit substitution backwards to v4.0. This applies to the IAQ testing protocol as well as all other credits.