Hey everyone, 

With the coming In-Use Off-Road Diesel-Fueled Fleets Regulation | California Air Resources Board we have been doing some research on availability of R-99 fuel prior to the January 1 start date. One thing we aren't finding in the research is an estimate of cost impacts. Has anyone started rolling out R-99 on their sites yet... Read more

Hey SDL,

I'm curious if anybody out there has developed specification language requiring a certain level of airtightness (as assessed via one or a series of blower door tests) for a commercial project when it is not going for a Passive House certification and a blower door test is not required by code--basically, something in the... Read more

Hello Everyone,

As the staff here at BuildingGreen prepares for our third peer network summit in two months, we'd like to share out the Summit Report from the first online summit with the Sustainable MEP Leaders. We're a little delayed in sharing this with the wider Green Gurus group, but there is still plenty of time to review before... Read more

Hi folks,

I'm looking into lower-carbon pipe options for HVAC and plumbing. The MEP 2040 has slides from a Buro Happold study in 2020 showing PEX to be much lower in embodied carbon than copper, which is unsurprising. CPVC is also a lower-carbon option.

But PVC has its issues and neither PVC nor PEX are recyclable (especially if... Read more

Hello small firm Sustainable Design Leaders!

We are cancelling our call next week that had been scheduled for 2/13 @ 1pm. That same day, Thursday, BuildingGreen is hosting an all Peer Networks WEBINAR. Please consider participating with the sustainability leaders from all peer networks: Design Leaders, Construction Leaders, MEP Leaders... Read more

Hello lovely Green Gurus!

Just wanted to take a quick second to let you all know how much I've appreciated this amazing network over the last few years. I have taken a position at Amazon Worldwide Sustainability in their Sustainable Buildings group, and while I will be leveraging all of my skills and experience doing much the same thing... Read more

Welcome to the quiz portion of Designing Natural Ventilation.

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


1. Explain how natural venting and cooling potentials are realized in buildings.
2. Show how natural ventilation and passive cooling strategies can amount to increased... Read more

Has anyone heard about batu or cumaru as substitutes for ipe? I am looking for a durable deckling material, and would appreciate your recommendations for sustainable choices!

The headlines are everywhere—from heat waves in Europe to wildfires in the Western U.S. to tropical cyclone flooding in Australia. In this age of climate change, just as there’s an urgent need to reduce carbon emissions and other greenhouse gasses, we also need to adapt and invest in resilience.

Increasingly, owners are asking for risk... Read more

We have an MEP engineer that is calculating peak loads at about 6 times passive house levels on a large commercial building that is at or near passive house levels of insulation and air infiltration. We suspect one reason is that he is figuring a 50% efficiency level for the ERV. We are showing him ERV systems with 80-90% efficiency, but they... Read more

Hi folks,

For those in the SD Leaders network, here's a reminder about the webinar this Friday at 2:00 eastern time. I hope you can join us!

For other Green Gurus, you're welcome to join in, get a preview of the report, and learn about what happened at the SDL Summit at Gulf State Park, in Alabama (fortunately, NOT near where the... Read more

Hello, All,

Does anyone have experience with cove.tool (https://covetool.com/)?  Perhaps for those projects that may not get fully modeled, or as a tool to help set baselines?  It came across our radar recently, and I'm wondering if the subscription might be worth a try.

Thanks! 

Maria

Hi All, this is primarily directed at our Sustainable MEP folks, but please anyone with insight feel free to weigh in.

I am increasingly seeing designs and specifications asking for Passive House levels of airtightness as verified by blower door testing, but with traditional ventilation system designs. 

To me, Passive House US has... Read more