Championing the
Changemakers

Home Energy Auditing Standard, lays out the requirements for an audit—which include not only measurements of energy performance but also an assessment of... Read more

A new study shows that retrofits to old windows can provide nearly the same savings with far lower initial costs.

“Saving Windows, Saving Money: Evaluating the Energy Performance of Window Retrofit and Replacement,” from Preservation Green Lab and other groups, compared retrofit options to replacement windows and typical existing single... Read more

After two years of public comment and review, the Federal Trade Commission (FTC) has released a revised version of its “Guides for the Use of Environmental Marketing Claims.” Also known as the “Green Guides,” the publication outlines what the FTC may find to be deceptive marketing; the revised version includes updates and new sections on carbon... Read more

“Do I need a vapor barrier?” It’s a perennial question, but there’s no simple answer: heat and moisture interact with each other and with building assemblies in complicated ways, so the first thing you need is a vapor profile of the building assembly. This means looking at the vapor permeance of each material and ensuring it can dry should... Read more

“When it comes to building products, reducing the carbon footprint from concrete is one of the most significant actions that the building sector can take,” says Ed Mazria, founder and CEO of Architecture 2030. While there are many ways to reduce that footprint, without clear rules defining how to measure the impacts, it’s tricky to track... Read more

For children, the delicate, fern-like patterns left by Jack Frost on the inside of a windowpane can be magical. But for the owners of a brand new commercial building in the Midwestern U.S., they were more like a nightmare.

“There were 71 punched window openings, all of which had condensation on the inside that turned to frost... Read more

When you think of “healthy buildings,” indoor air quality and toxic chemicals may be the first things that come to mind, but WELL will take a holistic view, incorporating several alternative-health concepts with the idea of promoting psychological and emotional well-being as well as physical health.

Delos worked with the... Read more

Fly ash, a by-product of coal combustion, is considered “post-... Read more

We love to talk about retrofits and building reuse around here, but the flying saucer of... Read more

We have a sort-of love-hate relationship with our pellet stove. My wife leans more toward the latter, while I see the... Read more

Biking cross-country from San Francisco to Boston with a friend in 2010, I saw few... Read more

GreenSpec and EBN have reviewed a number of LED... Read more

It turns out you can get pretty darn dense even without building mile-high... Read more

I’ve been heating primarily with wood since I bought our house 31 years ago, though there were a few... Read more

Malcolm Lewis, Ph.D., the founder of Constructive Technologies Group, a member of the EBN Advisory Board, and long a quiet leader in the green building movement, died on October 13th of bladder... Read more

Lloyd Alter returns this week with more... Read more

When China dives into a technology, it does so in a big way. Nowhere is this more the case than in photovoltaic (PV) panel manufacturing, where dramatic growth... Read more

Photo Credit: International Living Future Institute

... Read more

Some people look forward to the Oscars, but for us it’s green building awards season... Read more

Nadav Malin and I had a great time presenting our webcast featuring BuildingGreen's new handbook, “Toxic Chemicals in... Read more