Hello, 

I am struggling with understanding if I should be using Annual Marginal Emission Factors (MEF) or Annual Average Emission Factors (AEF) for evaluating different building design decisions.

Everything I know is from this document. So as I understand it ... an individual building or retrofit is going to change the marginal... Read more

Does anyone know about temporary flushout equipment that could be used to augment a building's systems to get additional CFM of OA during construction?  For our non-laboratory type projects the flushout period ends up being too long, especially in either humid summers or frigid winters (Pennsylvania).

Hoping that some of you on either... Read more

Churn and renovations can disrupt occupants, release or introduce indoor pollutants, and increase the embodied footprint of a building.

BuildingGreen-Approved Partitions

Movable partition systems allow spaces to be easily reconfigured, reducing costs and environmental impact. BuildingGreen approves partitions and panels that have... Read more

A couple questions for this group. I know we're having a Green Commons meeting on this next week. But can anyone comment on the following questions?

-Have you or your firm split the benefit of the 179D with a client? Is this typical?

-Is prevailing wage a requirement for all 179D benefit, or does it follow the same lines as... Read more

Dear All,

I'm happy to announce the Call for Speakers for our next Gulf Coast Green conference, which will take place June 1, 2018 at Rice University in Houston.  The theme is Resilience: Beyond Recovery.  (Harvey, you know).  We absolutely love to have SDL members at Gulf Coast Green, and I know there are several of you who specialize... Read more

Hi! We're putting together a pre-summit survey to collect input from everyone who's signed up for the Summit; we'll use that to prep the agenda for our get-together July 9-10.

Based on our last few phone calls, here's a list of topics on our radar. If there are others you'd like to see added to the survey, or if you have more thoughts... Read more

Welcome to the quiz portion of Re-forming the Building Industry: Equity, Diversity, and Inclusion!

Learning Objectives
Upon completing this course, participants will be able to:


1. Define equity, diversity, and inclusion, and explain their relevance to the building industry as well as how they contribute to occupant and... Read more

Welcome to the quiz portion of Dream Materials: What Do You Really Want to Build With?

Learning Objectives
Upon completing this course, participants will be able to:


1. Differentiate the tools that encourage accountable design.
2. Identify materials that are hazardous and list certifications that optimize for... Read more

Was anyone else surprised to see ASHRAE 228-2023 using eGRID Subregions for both the Regional Electricity Source Energy Conversion Factor and Regional Electricity Greenhouse Gas Emission Factors? In the past I have used eGRID sub-regions but also State and local utility conversion factors depending on what energy or operational carbon story I... Read more

Returning to work: for many, it’s unthinkable without some kind of reassurance that leadership and the facilities team have taken all possible precautions. Lots of organizations are weighing in on what we should pay attention to, but how do we know if it’s working?

The free Re-entry program from Arc is a tracking and measurement... Read more

SDL Group -

Hi all!  After a brief hiatus from the group to move from New Orleans to Portland (OR), start a new job at ZGF Architects, buy a house, and  see my baby boy become a toddler (all in the past year!)---- I'm ready to plug back into the group.  Seeing folks at the ILFI conference re-energized me to reengage :)

So…..does... Read more

Dear all,

A mechanical engineer on a healthcare project we are working on has asked for help in dividing the ventilation calculations between ASHRAE Standards 170 and 62.1; can anyone here help shed some light on it?

"This is the first time I am working on LEED for a hospital and I am not sure how the template wants me to show... Read more

Hi Green Commons,

It’s been eerily quiet here since Tuesday night. I’ve been quiet mostly because I just didn’t know what to say. The election results are certainly a blow to pretty much everything we’ve been working for. There is so much we don’t know about things might play out, but I’m feeling a range of emotions ranging from... Read more

It’s here! By popular demand we’re re-running the SDL Salary Survey that we last ran in 2015. 

This is for people who are currently in an SD Leader role at a firm. We’re sending this invitation out on both the Green Gurus and the SD Leaders forums, because some of you are still in transition and haven’t moved into the SD Leader forum yet... Read more

I'm exploring the use of phase change material for a project. Specifically, looking at the BioPCM/ENRG Blanket product. I see on their website that ZGF used it at University of Washington. I'd love to hear any feedback from folks who have used it, and more specifically how your energy model and MEP engineer accounted for it. Thanks!! https://... Read more

Hi all,

We're seeing more interest and desire for outdoor work spaces, and as we consider the design implications around working outdoors, teams have been asking about wind comfort. We've tested Ingrid Cloud and now SimScale. I'm curious if anyone would recommend any other CFD tools that are geared toward architects? Also curious if... Read more

Were we given any warning that LEED Online and USGBC.org would be down for a week?