Energy efficiency is central to most definitions of high-performance buildings. It is also central to BSC’s consulting, research, and education activities. At BSC, we believe in promoting energy efficiency and environmental responsibility within the constraints of marketable and affordable building technology.
The documents below discuss why energy is critical to sustainability and how to define and understand energy use (for example, through energy metrics). They also touch on key issues in energy reduction in buildings, such as thermal control and advances in window technology for commercial and residential buildings.
An edited version of this Insight first appeared in the ASHRAE Journal. Thermal Bridges—steel studs, structural frames, relieving angles and balconies.
When I see a fully glazed, floor-to-ceiling commercial or institutional building, I see an energy-consuming nightmare of a building that requires lots of heating and cooling at the perimeter just to maintain comfort. The result, on a cold winter day, is that offices exposed to the sun require cooling, while those in the shade need heat.
An edited version of this Insight first appeared in the ASHRAE Journal. Many “green” buildings don’t save energy. Why? They have too much glass, they are over-ventilated, they are leaky to air, they are fraught with thermal bridges and they rely on gimmicks and fads rather than physics.
This article was first published in "Perspectives," Volume 17, Number 1. Spring 2009. The on-going consumption of energy to operate, condition, and light a building, as well as the energy embodied in on-going maintenance is the largest single source of environmental damage and resource consumption due to buildings. Reducing the operational energy use and increasing durability should be the prime concerns of architects who wish to design and building “green” buildings.
The future is uncertain. This is a truism, and yet, when we design and construct a new building, we need to make decisions in the present or very near future. In fact, this is one of the critical distinctions about designing buildings: they are expected and likely to last 50 to 100 years, but we build them now. The challenge of designing for the future is no more acute than in the current choices facing the designer of an environmentally friendly building.
An edited version of this Insight first appeared in the ASHRAE Journal. Energy security is pretty easy to get a handle on—don’t buy oil from the Middle East, Russia, Nigeria and Venezuela. The problem is that it is not cheap energy and it is not clean energy. We can make it clean, and we will, but it will be even more expensive. And actually that is good because we won’t waste it when it is expensive.
All space-conditioning systems are intended to provide a comfortable and healthy indoor environment. But the fact is, the the most popular residential furnace/AC systems and commercial VAV systems are fundamentally flawed from their conception.
This Insight reviews the Passivhaus (PH) low-energy house standard and briefly compares it to other cold climate low energy house standards, such as the Building America program, Energy Star, and R2000 homes.
This Insight is in response to questions from clients and interested members of the public and academia, I have recently written about some aspects of the German PassivHaus housing standard as it applies to cold climates.
An edited version of this Insight first appeared in the ASHRAE Journal. Higher levels of thermal resistance and reduced heat gain across building enclosures has forever changed the performance of buildings—and not necessarily in a good way.
An edited version of this Insight first appeared in the ASHRAE Journal. Those of us who are no longer young remember how easy it was going to be to save energy by caulking and insulating.
Given what happened in New Orleans during hurricane Katrina, changes in the way we build are needed. Looking to key sustainability concepts of durability and energy efficiency, new flood resistant design concepts were developed.
This report is an excerpt from the 2008 Building America Annual Report. Following the almost complete destruction of Greensburg, Kansas by a tornado in May, 2007, Building Science Corporation (BSC) was contracted to provide example house plans, support for the reconstruction of energy efficient houses and training for builders and trades. This report describes the results of BSC’s work to construct more than 20 energy efficient, affordable, durable houses in Greensburg, Kansas.
This paper was first presented at the 2011 ASHRAE Annual Conference. A startup builder in the San Francisco Bay Area has a goal of producing factory built/modular houses with net zero energy performance. Their first prototype was a two-story, two bedroom, urban infill townhouse design. It has been in operation for roughly a year, and has been extensively measured and monitored, providing information about its net zero performance.
This paper was first presented at the 2011 ASHRAE Annual Conference. A homebuilder in the New England area has been building net zero energy single family homes since 2008 and is continuing with multiple small-scale subdivisions of 20 or more homes. This builder specializes in net zero affordable homes and sustainable net zero communities, while retaining houses with a familiar local vernacular appearance.
Windows and curtainwalls are ubiquitous building enclosure components. Like all parts of the building enclosure, they have to meet the fundamental functional requirements of support, control and finish (Straube & Burnett, 2005). Reprinted with permission from Journal of Building Enclosure Design, Winter 2010, pages 12 -15.
