Ground- and water-source heat pumps move refrigerant or water through the ground or a body of water for use as a heat source (for indoor heating) or heat sink (for indoor cooling).

BuildingGreen-Approved Heat Pumps

BuildingGreen approves:

Welcome to the quiz portion of Toxic Chemicals in Buildings: How to Find and Avoid the Worst Offenders (recorded webcast).

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


1. Explain how key health hazards and opportunities for healthier choices vary by product category.
2. List... Read more

I’m working on a hospitality project with a large scale farm to table operation, and I am concern about land space and agricultural practices. I'm looking for someone that can advise us on how to establish good agricultural planning and practices. The project is in Utah.

Has anyone work with consultants or academic group focus on this?... Read more

Is LEED Online mind-numbingly slow today for anyone else? Or is it just me? I may give up and try again tomorrow. Frustrating as I was hoping to submit a final review today. :(

Hello all, 

Wondering if anyone has experience with lead limits in electrical cable and wiring? 

LEED for Healthcare allows a limit of 300 ppm of lead in electrical wire and cabling - my search for compliant products has been all dead ends. (MRc PBT Source Reduction - lead, cadmium, and copper)

Acceptable regulations for... Read more

Hey all,

I got plugged into this group about two weeks before GreenBuild and wasn't able to make it to the summit. I'm still catching up on all the work this group has been doing recently, but I know one of the big ticket items is the SCL Contractor Commitment. 

I've read through the commitment that was posted right before... Read more

Does anyone know of a source for finding the operational solid waste generated by typical building/use types (weight/sf)? I couldn't find anything on LEED, True, or EPA. I found this table but isn't by sq ft for many of hte uses. Waste Generated by Industry and Building Type (wastecare.com)

Hello fellow sustainable design leaders! I am about to kick off an intensive effort here at EHDD to refine our internal standards for materials. We will be considering both GWP as well as the health of materials (avoiding harmful chemicals). In addition to setting the standards, I will be working to develop a process to vet materials before... Read more

Just an FYI that BG's web team is planning on attending your meeting at 1:00 EDT. We will need information on how to join since the info in the invite didn't work last time.

See you all then.

Nothing exciting like embodied carbon or EPDs... but I'm interested in some real talk on the actual performance of low-flow fixtures.  

We continue to encounter pushback on water-saving fixtures for concerns of ongoing performance. I'd love to have a dialog in this group because I find it hard to believe these challenges can't be... Read more

We have a client who is asking us to design a roughly 10 ksf Wellness Center for PHIUS 2021 certification.  The program includes several high density assembly type spaces - roughly 300 person peak occupant load for the building.  The Criteria Calculator that the architect showed us puts the building peak cooling load at 4 BTUH/sf (3000 sf/ton... Read more

Hey, all. Two questions:

-How do we communicate to you LEED User content that needs to be pulled through to BIT-user pages? Are you all going to assess each BP page for potential articles/topics that will be linked?

-Regarding the forums- is there a way to notify program staff when a forum has an unanswered question? Hoping to... Read more

ICYMI, this washington post piece reminded me of our summit conversation last Friday about architecture's/SDL's role in reimagining the world post-covid through innovating our practice. 

The article contains some compelling quotes from several visionary architects (fascinated that it's mostly big-A architects, largely bypassing input... Read more

Quiz body not needed for this auto-confirmation

Board insulation has good thermal performance ranging from about R-4 to R-8 and is used as an integral part of a building envelope’s continuous insulation system.

Because board insulation is used on the building exterior, it is not always subject to the same material health and emissions requirements as batt insulation used inside the... Read more

THIS WEBINAR PURCHASE AND REGISTRATION IS CLOSED.

Hot spots: they might sound like fun places to hang out and have a drink—but in green building, they’re actually a bad thing. Something you track down so you can get rid of it. Kind of like being an environmentalist bounty hunter.

Life-cycle assessment (LCA) is... Read more