Should I Build a Mechanical Room in My Attic?

Fri, 2018-07-20 06:18
Prime:  prime Subtitle:  By the time you add up all of the costs, you’ll probably abandon the idea Images: 

In many southern states, it’s common for an HVAC(Heating, ventilation, and air conditioning). Collectively, the mechanical systems that heat, ventilate, and cool a building. contractor to install an air handler and ductwork in a vented unconditioned attic. In July, the attic temperature rises to 120°F. Perhaps the homeowner, irritated by his hot bedroom and concerned about his high electricity bills, sticks his head through the attic access hatch, and nearly faints. It’s a sauna up there.

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Categories: Green Homes

What Makes Plastic ‘Recyclable’?

Fri, 2018-07-20 04:03
Subtitle:  Two trade groups seek a common definition and an end to confusion in the marketplace Images: 

Trade groups representing plastic recyclers in Europe and the U.S. are working together on a common definition of the word "recyclable" in an effort to reduce confusion in the marketplace.

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Categories: Green Homes

Putting Methane Leaks Into Perspective

Thu, 2018-07-19 05:47
Subtitle:  The U.S. natural gas industry is leaking way more methane than previously thought Images: 

By ANTHONY J. MARCHESE and DAN ZIMMERLE

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Categories: Green Homes

Lawmakers Target Environmental Groups

Wed, 2018-07-18 05:52
Subtitle:  Green-baiting lawmakers are accusing environmentalists of doubling as ‘foreign agents’ Images: 

By JAMES A. HOLTKAMP

Two congressional committees ledLight-emitting diode. Illumination technology that produces light by running electrical current through a semiconductor diode. LED lamps are much longer lasting and much more energy efficient than incandescent lamps; unlike fluorescent lamps, LED lamps do not contain mercury and can be readily dimmed. by prominent Republicans are looking into whether some U.S. environmental groups are acting on behalf of foreign countries.

As an environmental lawyer and professor with ample international experience, this probe troubles me. I’m concerned that these efforts may mark the start of an attack on free speech that discourages efforts to improve American environmental policies.

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Categories: Green Homes

Getting Dangerous Paint Strippers Off the Shelves

Tue, 2018-07-17 05:10
Subtitle:  Lowe’s, Sherwin-Williams, and Home Depot do the right thing in removing paint strippers that contain a dangerous chemical Images: 

By SHELLEY POTICHA

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Categories: Green Homes

Solar Under Storm

Mon, 2018-07-16 06:20
Subtitle:  Designing hurricane-resilient PV systems Images: 

By LAURIE GUEVARA-STONE
and CHRISTOPHER BURGESS

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Categories: Green Homes

California Meets Carbon Emissions Goal Early

Mon, 2018-07-16 02:41
Subtitle:  The state reduces CO2 emissions to 1990 levels, four years ahead of its deadline Images: 

California has successfully reduced carbon emissions to 1990 levels, beating its goal by four years.

The Sacramento Bee reported that according to the California Air Resources Board, emissions dropped to 429 metric tons in 2016, a decline of 12 million tons from a year earlier and enough of a decline to meet the state's climate change objectives.

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Categories: Green Homes

Understanding Dew Point

Fri, 2018-07-13 06:13
Prime:  prime Subtitle:  If you’re a designer or builder who lacks an intuitive understanding of dew point, this article may help Images: 

The dew point is a temperature. In my article on the psychrometric chart, I defined dew point as “the temperature at which moisture in the air begins to condense on hard surfaces.” Dew point can be measured or calculated for a specific point in time at a particular location, indoors or outdoors. No matter where it’s measured, the dew point is always less than the air temperature.

Here are a few other definitions for “dew point”:

  • The dew point is the temperature to which air must be cooled to become saturated with water vapor.

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Categories: Green Homes

Colorado’s Low-Income Solar Model

Fri, 2018-07-13 04:33
Subtitle:  Energy assistance programs are helping to get PV systems on rooftops and helping lower energy bills Images: 

Colorado is expanding its energy assistance efforts to make solar electricity available to more low-income households. The state is using a systematic approach that experts say could be a "clear roadmap" for other states.

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Categories: Green Homes

How a Misinformation Campaign Altered the Debate on Climate Change

Thu, 2018-07-12 05:55
Subtitle:  Thirty years ago global warming became front-page news — and both Republicans and Democrats took it seriously Images: 

By ROBERT BRULLE

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Categories: Green Homes

The Important Stuff You Need to Know About Ceiling Fans

Wed, 2018-07-11 06:07
Prime:  prime Subtitle:  Here are a few basic principles that many people don’t understand Images: 

Here we are in the middle of air conditioning season.  So why don't we chop down some myths and misconceptions about ceiling fans?

What got me on to this topic was a video of a fan with blades that hide on top of the fan when the fan is turned off. Sounds clever, but it's a ridiculous idea.

Anyway, here are seven things about ceiling fans that a lot of people seem not to know.

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Categories: Green Homes

China is Alleged Source of Illegal Blowing Agent

Tue, 2018-07-10 11:11
Subtitle:  Investigators track down source of long-banned blowing agent CFC-11 and find its use is widespread Images: 

Researchers earlier this year said were surprised to find atmospheric levels of a banned blowing agent used in the production of spray polyurethane foam were much higher than expected. All they could deduce was the source was somewhere in East Asia.

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Categories: Green Homes

Saving Sustainably: Pouring the Slab

Tue, 2018-07-10 04:48
Subtitle:  A capillary break, mineral wool insulation, and a vapor barrier complete the prep work Images: 

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, here. If you want to follow project costs, you can keep an eye on a budget worksheet here.

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Categories: Green Homes

Does Radiant Floor Cooling Make Sense?

Mon, 2018-07-09 04:50
Subtitle:  Already committed to radiant floor heating, a homeowner wonders whether the same system also can cool the house Images: 

Steve Mackay is already committed to radiant floor heat in the house he is building. Why not, he wonders, use the same system for cooling?

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Categories: Green Homes

Ducted Air-Source Heat Pumps from American Manufacturers

Fri, 2018-07-06 05:25
Prime:  prime Subtitle:  Are there any cold-climate heat pumps that can be connected to regular forced-air ductwork? Images: 

Mitsubishi and Fujitsu sell air-source heat pumps (ductless minisplits and ducted minisplits) that work well in cold climates. Many GBAGreenBuildingAdvisor.com readers report that these appliances are providing dependable space heating in climates as cold as Minnesota, Vermont, Maine, and Quebec, where temperatures drop to -20°F or colder.

Traditionally, U.S. manufacturers of air-source heat pumps have favored ducted units over ductless units. Most air-source heat pumps sold by Bryant, Carrier, Lennox, and Trane, for example, are designed to be hooked up to forced-air ductwork, just like a typical furnace.

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Categories: Green Homes

Concern Mounts Over Natural Gas Leaks

Thu, 2018-07-05 13:40
Subtitle:  Emissions of this potent greenhouse gas waste billions of dollars each year and threaten the fuel's environmental edge over coal Images: 

The amount of methane leaking into the atmosphere from gas and oil operations in the U.S. is far higher than official government estimates, putting at risk the environmental advantages of burning natural gas over coal to make electricity.

A study published in the journal Science last month reports that emissions of the powerful greenhouse gas are roughly 60% greater than what the Environmental Protection Agency thinks they are.

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Categories: Green Homes

Electrifying Buildings for Decarbonization

Thu, 2018-07-05 05:44
Subtitle:  A new report from the Rocky Mountain Institute examines the role of electric space and water heating Images: 

By SHERRI BILLIMORIA, LEIA GUCCIONE,
and MIKE HENCHEN

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Categories: Green Homes

Insights from Successful Net-Zero Builders

Wed, 2018-07-04 06:00
Subtitle:  To increase the number of net-zero energy homes beyond niche status, we need to learn how forward-looking builders broke into this market Images: 

By ALISA PETERSEN

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Categories: Green Homes

U.S. Green Building Council Names Award Recipients

Tue, 2018-07-03 04:17
Subtitle:  Outstanding single-family project goes to a house built by Carl Seville and detailed in a GBA blog Images: 

The U.S. Green Building Council has named a high-performance house in a Decatur, Georgia, historic district as its 2017 Outstanding Single-Family Project.

The house will be familiar to Green Building Advisor readers. Carl Seville, who built and owns the 2,646-square-foot, two-story home, is a longtime GBAGreenBuildingAdvisor.com author who detailed the ups and downs of this home's construction in a series of posts beginning in 2016.

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Categories: Green Homes

The Takeover of the EPA

Tue, 2018-07-03 04:13
Subtitle:  EPA staff say the Trump administration is changing their mission from protecting human health and the environment to protecting industry Images: 

By CHRIS SELLERS, LINDSEY DILLON and PHIL BROWN

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Categories: Green Homes

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