This is deep nerdy stuff, so don't say you haven't been warned.  ASHRAE has opened the first public review to its net zero standard (228).  Here's the blurb:

Standard Method for Evaluating Zero Net Energy and Zero Net Carbon Building Performance ASHRAE Standard 228-202x sets requirements for evaluating whether a building or group of... Read more

As BuildingGreen’s Content & Data Wrangler, Fran is a spreadsheet and content-management wiz who:

Fran also compiles data submissions... Read more

Hi folks,

As you've no doubt heard from us by now (several times), in lieu of Summer Summits this year we're offering a combination of events this fall. Our series kicked off last week with a great Regional Mini-Summit in Boston. Regional events like this were in our plans before COVID blew everything up, so this one was a long-time... Read more

Welcome to the quiz portion of Passive Solar Heating.

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


1. Explain the three classic approaches to passive solar.
2. Understand the relevance of passive solar today.
3. Describe some key elements of passive solar design.
... Read more

Ventilation is essential for indoor air quality, but it can bring very hot or very cold outdoor air into conditioned space.

BuildingGreen-Approved ERVs

Heat-recovery ventilators (HRVs) and energy-recovery ventilators (ERVs) can save energy by capturing nearly all of the heat in the air being exchanged. BuildingGreen approves:... Read more

Hello Green Gurus,

Want to make your virtual meetings wildly effective, connective, and fun? This fall we are delighted to partner with Julie Huffaker from Deeper Funner Change to bring you a series of 5 online workshops that will teach you skills to improve all your virtual meetings.

Julie brings more than 25 years of experience... Read more

We have a project that is looking for plaster/stucco/textured wall products that are sustainable, or “more sustainable.”

I know these products exist, but I haven’t had to spec or work with any, so I’m reaching out.

The project is in MA, so I'm also soliciting recommendations for products and/or companies who are experienced using... Read more

Welcome to the quiz portion of Finding Products for LEED v4 and v4.1!

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


I can see from the threads that there are at least a few Passive House advocates in this group - I'm wondering about the PHIUS training and certification. Can any who have done it offer an opinion? Is it valuable? Residentially focused? Would it apply to someone in a larger commercial practice? It's an investment of time and $, so I really want... Read more

Hi everyone,

Will you be attending the Living Future 2023 conference, or do you live near the DC area?

If so, you’re invited to join us for an informal meetup!

When: Wednesday May 3, 2023, 7:30-9pm ET

Where: SmithGroup, 1700 New York Avenue, NW, Suite 100, Washington DC

If you plan on coming, please be sure to... Read more

Hi everyone - we have a new higher ed client who is committed to sustainability but not very knowledgeable about current topics such as carbon (both embodied and operational) or the electrification of buildings.  I need to educate them and would like to start with some easily-digestible background reading.  But as we all know, we're a bit dorky... Read more

I am diving back into Sefaira for the first time in a while, and the program still seems to be missing the ability to account for automatic daylight dimming in energy savings. Previously I had used an LPD reduction equivalent to emulate the savings automatic dimming would provide. Has anyone done a similar work-around? 

Hi All,

After this long winter, who is up for some fierce creativity and friendly competition in your own offices or between your companies?  What do you think of a location agnostic, virtual, Sustainability Scavenger Hunt from Earth Day to Mother's (earth) Day?

We've done the hard work for you. Join in on the fun and save your... Read more

BuildingGreen Approved, like its predecessor, GreenSpec, is an independent product evaluation service for BuildingGreen members. We offer an unbiased look at products: BuildingGreen does not accept any manufacturer fees for our evaluations. Here’s a quick tour of the platform and how to use it.

Hi all-

We are dabbling in developing an official research component of our firm. We have collaborated with a class at a local university and are looking for ways to take our research to a higher level. I'm curious how some of the other firms doing design or building technology research approach the process. For instance, do you have a... Read more

A brief non-technical rant about OneClick LCA - from someone who is not actually USING the tool, but lobbying for its access.  Wondering if you all have better intel, or if it is just me.

We are working on a number of projects for which te teams are using OneClick LCA - for some cases it has a better international data set than others. ... Read more

As promised at the SDL Summer Summet: Hennepin County Energy & Environment's new Project Manager’s Guide to Material Reuse in Commercial Buildings, with specification language, guidance for procurement, and case studies of successful reuse projects around the country. This resource is meant to help owners, architects, and contractors... Read more