Our pellet stove has DC fans and a kit that allows us to hook it up to a battery to power those fans in the event of a power outage. Photo: Alex Wilson. Click on image to enlarge.
There are more than 20 different standardized tests manufacturers can invoke to "qualify" as a code-accepted weather-resistive barrier (WRB); with our GreenSpec section on WRBs, we've picked just one that we think does the job.

It's not easy being a weather-resistive barrier (WRB): it has to stop liquid water, be tough and not tear, but also be flexible to wrap around building elements. And it often needs to be vapor-permeable to promote drying.

This exterior window shade in Florida blocks most of the solar gain, yet allows some view out. Photo: Alex Wilson. Click on image to enlarge.
BIPV has yet to reach its full potential in the U.S., but a couple companies are giving it a shot. Soltecture's Corium thin-film CIGS BIPV is installed on the company's headquarters in Berlin.
Passive solar design is a key element of creating resilient homes. A passive solar home in Halifax, Vermont. High-SHGC, triple-glazed, south-facing windows were used to improve the direct-gain passive solar performance. Click on image to enlarge.
What's in it? Where was it made? Is the manufacturer socially responsible? These questions about green building products are getting easier to answer. This is Part 1 in our series on transparency. Part 2: Why We Need "Nutrition Labels" for Building Products
Nutrition labels allow shoppers to compare two bags of chips. The transparency movement seeks that level of transparency for building materials. This is Part 2 in our series on transparency. Part 1: Why We Care About Product Transparency Part 3: The End of Greenwashing? Five Myths about Product Transparency
A resilient home is a highly energy-efficient home that will maintain livable conditions even during power outages or interruptions in heating fuel. A superinsulated "Passive House" being built by Dan Whitmore in Seattle. These wall trusses provide about a foot of insulation. Photo: Dan Whitmore. Click on image to enlarge.
USGBC's Center for Green Schools lauds ten groups for taking the lead on green building education.
Windows, carpet chemicals, spray-foam, and LEED lawsuits: these are a few of your favorite things.

It's been a big year for green building. People are tightening up their buildings even as they tighten their belts. The retrofit market and multifamily housing have taken off in a big way in this new financial landscape.

On August 28th Tropical Storm Irene flooded downtown Brattleboro, totally submerging Flat Street. Photo: Charlie Boswell. Click on image to enlarge.
Double the fun by reading your favorite EBN articles to help you meet your LEED CMP requirements!

Looking for ways to meet your "prescriptive" continuing education (CE) requirements with the LEED Credential Maintenance Program (CMP)? Here at BuildingGreen.com we have long offered articles to help you earn your credits--articles that will truly help you learn cutting-edge green building information.

Dear friends,

We know that the economic climate in 2011 has continued to be challenging, so we're all the more grateful and flattered that so many of you continue to rely on our tools and resources for insight, guidance, and community.

For some fun around the holidays, GreenSpec is holding a virtual "open house"--giving you a sneak peek at some cool new products we're reviewing, and our first impressions. We'd like to hear what you think, so please read our first impressions below and then take the quick survey. Happy holidays! Update: Thank you for your feedback. We have closed the survey and are using it to inform our ongoing research agenda.

Route 4 near Killington, Vermont was closed for more than a month due to flooding from Tropical Storm Irene. Photo: Lars Gange and Mansfield Heliflight. Click on image to enlarge.