Guest Blogs

We’re Pouring Millions of Tons of Salt on Our Roads

Posted on February 1, 2018 by Anonymous

By GREG BREINING

If you live — and drive — in a northern or mountainous climate, you’ve seen highway trucks spreading loads of rock salt on snowy highways to melt the ice. But where does the salt go?

The FHA Problem with PACE

Posted on January 31, 2018 by Anonymous

By JACOB CORVIDAE and MARTHA CAMPBELL

Last month, the Federal Housing Administration (FHA) announced it will stop insuring new mortgages on homes with property assessed clean energy (PACE) loans. As to what motivated its decision —

Why Is Wood Burning Counted as Green Energy?

Posted on January 30, 2018 by Fred Pearce

This post originally appeared at

Six Steps to Success With Heat-Recovery Ventilation

Posted on January 29, 2018 by Bruce Sullivan

Heat-recovery ventilators (HRVs) and energy-recovery ventilators (ERVs) remove stale air from the home and replace it (in winter) with preheated fresh air from outside. The result is better indoor air quality and lower energy use than in standard homes. The HRV itself is fairly simple: an airtight box with a heat exchange core that transfers heat from the indoor air to outside air (or vice-versa) as the air passes through the box. The box also contains two small fans to move the air. All the points below apply equally to HRVs and their close cousins, energy-recovery ventilators (ERVs).

Urban Rustic: Prepping for a Basement Slab

Posted on January 23, 2018 by Eric Whetzel

Editor's note: This post is one of a series by Eric Whetzel about the design and construction of his house in Palatine, Illinois, a suburb of Chicago. The first blog in his series was called An Introduction to a New Passive House Project; a list of Eric's previous posts appears below. For more details, see Eric's blog, .

California Gets New Light Bulb Efficiency Standard

Posted on January 18, 2018 by Noah Horowitz

One of the least energy-efficient products in modern history, the incandescent light bulb — a type of bulb that dates back to the days of Thomas Edison — is being permanently retired in California as of January 1, 2018, and in 2020 for the rest of the nation. California is demonstrating its environmental leadership once again by being the first state in the nation to move forward with improved energy efficiency standards for the everyday screw-based light bulb.

Rebuilding America and the ‘New Normal’ of Resilience

Posted on January 17, 2018 by Anonymous

By RADHIKA LALIT and KELLY VAUGHN

This year’s hurricane season is the most expensive on record, with $202.6 billion in damages according to Bloomberg. These storms across the Atlantic had devastating impacts on people’s lives and homes, on communities, and on infrastructure in the hardest-hit areas.

No, Wind Development Is Not a National Security Threat

Posted on January 16, 2018 by Christian Haig

Note: This is fourth and last in a series of blogs highlighting recent progress in onshore and offshore wind energy and examining some of the opportunities, challenges and threats the industry faces. The series was originally published by .

Flatrock Passive: Wrapping Up the Air Barrier                                             

Posted on January 15, 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 .

How to Foster Solar Innovation and Save Jobs

Posted on January 11, 2018 by Anonymous

By EDWARD BARBIER and TERRY IVERSON

The U.S. solar industry is nervously awaiting President Donald Trump’s decision whether to impose punitive duties on imported solar panels and related equipment or even restrict some of those imports altogether. It could come any day between now and .

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