Guest Blogs

Flatrock Passive: Laying Out the Mechanical System

Posted on May 21, 2018 by David Goodyear

Editor's Note: This is one of a series of blogs by David Goodyear describing the construction of his new home in Flatrock, Newfoundland, the first in the province built to the Passive HouseA residential building construction standard requiring very low levels of air leakage, very high levels of insulation, and windows with a very low U-factor. Developed in the early 1990s by Bo Adamson and Wolfgang Feist, the standard is now promoted by the Passivhaus Institut in Darmstadt, Germany. To meet the standard, a home must have an infiltration rate no greater than 0.60 AC/H @ 50 pascals, a maximum annual heating energy use of 15 kWh per square meter (4,755 Btu per square foot), a maximum annual cooling energy use of 15 kWh per square meter (1.39 kWh per square foot), and maximum source energy use for all purposes of 120 kWh per square meter (11.1 kWh per square foot). The standard recommends, but does not require, a maximum design heating load of 10 W per square meter and windows with a maximum U-factor of 0.14. The Passivhaus standard was developed for buildings in central and northern Europe; efforts are underway to clarify the best techniques to achieve the standard for buildings in hot climates. standard. The first installment of the GBAGreenBuildingAdvisor.com blog series was titled An Introduction to the Flatrock Passive House. For a list of Goodyear's earlier blogs on this site, see the "Related Articles" sidebar below; you'll find his complete blog .

We Calculated How Much Trees Save for Your City

Posted on May 17, 2018 by Theodore A. Endreny

. There are currently 47 such areas around the globe, each housing more than 10 million residents.

More than half the global population now lives in urban areas, comprising about 3% of the Earth. The ecological footprint of this growth is vast and there’s far more that can be done to improve life for urban residents around the world.

The Electric Vehicle Boom Is Coming

Posted on May 16, 2018 by Andy Balaskovitz

This post originally appeared at .

Saving Sustainably: Foundation Formwork

Posted on May 15, 2018 by Matt Bath

Editor's note: This is one in a series of blogs detailing the construction of a net-zero energyProducing as much energy on an annual basis as one consumes on site, usually with renewable energy sources such as photovoltaics or small-scale wind turbines. house in Point Roberts, Washington, by an owner/builder with relatively little building experience. You'll find Matt Bath's full blog, Saving Sustainably, . If you want to follow project costs, you can keep an eye on a budget worksheet .

A 107-Year-Old Net Positive Victorian Retrofit

Posted on May 10, 2018 by Stewart Herman

In 2014, I learned about net-zero energyProducing as much energy on an annual basis as one consumes on site, usually with renewable energy sources such as photovoltaics or small-scale wind turbines. at the Minneapolis Home & Garden Show. Shortly thereafter, my wife and I purchased our retirement home and interviewed five sets of architects to compose the core of the design team. We settled on Marc Sloot of SALA Architects and Sean Morrissey of Morrissey Builders in St. Paul, both with considerable experience in sustainable design and construction.

Market Forces Are Driving a Clean Energy Revolution

Posted on May 8, 2018 by Bill Ritter

Transforming U.S. energy systems away from coal and toward clean renewable energy was once a vision touted mainly by environmentalists. Now it is shared by market purists.

Today, renewable energy resources like wind and solar power are so affordable that they’re driving coal production and coal-fired generation out of business. Lower-cost natural gas is helping, too.

Frugal Happy: A Car-Free Experiment

Posted on May 7, 2018 by Chris Stratton and Wen Lee

Editor's Note: This post is one of a series by Chris Stratton and Wen Lee, a husband-and-wife team living in the Los Angeles area who are turning their suburban house into an all-electric, zero-net energy home. They chronicle their attempts at a low-carbon, low-cost, and joyful lifestyle on their blog . This post was written by Wen.

How Texas Is Building Back Better From Hurricane Harvey

Posted on May 3, 2018 by Nicole Errett

For most Americans, the one-two punch of last fall’s hurricanes is ancient history. But hard-hit communities in Texas, Florida, and the Caribbean are still rebuilding.

Using Energy Modeling to Get to Zero

Posted on May 2, 2018 by Bruce Sullivan

A computerized energy model is an essential element of building design for high-performance homes, because it allows the designer to predict the energy performance of a building based on specific site characteristics, structural assemblies, mechanical efficiencies, and renewable technologies. By adjusting these elements of building performance, the designer can choose the most cost-effective combination of features. While models are just predictions — and therefore will never be completely accurate — skillful use of a modeling tool should lead to more affordable, energy-efficient buildings.

Flatrock Passive: Framing and Insulating an Interior Service Wall

Posted on May 1, 2018 by David Goodyear

Editor's Note: This is one of a series of blogs by David Goodyear describing the construction of his new home in Flatrock, Newfoundland, the first in the province built to the Passive HouseA residential building construction standard requiring very low levels of air leakage, very high levels of insulation, and windows with a very low U-factor. Developed in the early 1990s by Bo Adamson and Wolfgang Feist, the standard is now promoted by the Passivhaus Institut in Darmstadt, Germany. To meet the standard, a home must have an infiltration rate no greater than 0.60 AC/H @ 50 pascals, a maximum annual heating energy use of 15 kWh per square meter (4,755 Btu per square foot), a maximum annual cooling energy use of 15 kWh per square meter (1.39 kWh per square foot), and maximum source energy use for all purposes of 120 kWh per square meter (11.1 kWh per square foot). The standard recommends, but does not require, a maximum design heating load of 10 W per square meter and windows with a maximum U-factor of 0.14. The Passivhaus standard was developed for buildings in central and northern Europe; efforts are underway to clarify the best techniques to achieve the standard for buildings in hot climates. standard. The first installment of the GBAGreenBuildingAdvisor.com blog series was titled An Introduction to the Flatrock Passive House. For a list of Goodyear's earlier blogs on this site, see the "Related Articles" sidebar below; you'll find his complete blog .

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