Everyone seems to be talking about measuring carbon footprints and designing carbon-neutral buildings, but these terms mean different things to different people. Some focus just on operating energy, while others also look at transportation, materials, and other building-related emissions. As with so many things, the results depend on what you count and how you count it.
Incorporating a continuous air barrier into a building's design and construction can save energy and improve the indoor environment, among other benefits. The right materials and assemblies can help accomplish that goal, but careful attention during design and close oversight during construction are essential.
Nanotechnology takes advantage of the novel properties that particles can exhibit at a billionth of a meter in size. Those properties are being used in building materials, where they can improve thermal performance and the effectiveness of photovoltaics, among many possibilities. The field has little regulation, however, despite significant health and environmental concerns.
Recent changes in the financial industry are providing new opportunities for financing green buildings. However, lenders and investors have different approaches to documenting the benefits of green, which affect how they use rating systems and other metrics. To navigate effectively in the financial world, green designers and builders need to understand the territory.
Very common in northern Europe, district energy systems use a network of buried, insulated pipes to distribute centrally produced steam, hot water, or chilled water to heat or cool multiple buildings. These systems can make use of waste heat from power generation (combined heat and power) or renewable fuel sources to help reduce the environmental impacts of buildings and communities.
With several announcements at the 2006 Greenbuild conference in Denver, the U.S. Green Building Council signaled that it would use its LEED Rating System to reduce greenhouse gas emissions, by tightening LEED requirements and by increasing the number of buildings designed to LEED standards.
Many businesses and homeowners are choosing to buy green power, including renewable energy credits (RECs). This article examines the environmental benefits of green power, including on-site renewables, what REC buyers should know about their purchases, and investing in energy conservation.
Buildings and their occupants are vulnerable to threats ranging from storms and rising sea levels to accidents and terrorism. In this feature article, EBN describes how to design and construct buildings to maintain livable conditions in the event of extended power outages or loss of heating fuel or water.
The world's largest company claims to have embraced environmental responsibility in everything from its supply chains to its waste stream, with goals of creating a prototype store with 30% lower greenhouse gas emissions within four years and doubling trucking efficiency within ten years. But how big a difference can the shift make, and is it enough?