The most recent blogs at Green Building Advisor

Should I Build a Mechanical Room in My Attic?

Posted on July 20, 2018 by Martin Holladay in Musings of an Energy Nerd

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.

Putting Methane Leaks Into Perspective

Posted on July 19, 2018 by Anonymous in Guest Blogs

By ANTHONY J. MARCHESE and DAN ZIMMERLE

Lawmakers Target Environmental Groups

Posted on July 18, 2018 by Anonymous in Guest Blogs

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.

Getting Dangerous Paint Strippers Off the Shelves

Posted on July 17, 2018 by Anonymous in Guest Blogs

By SHELLEY POTICHA

Solar Under Storm

Posted on July 16, 2018 by Anonymous in Guest Blogs

By LAURIE GUEVARA-STONE
and CHRISTOPHER BURGESS

Understanding Dew Point

Posted on July 13, 2018 by Martin Holladay in Musings of an Energy Nerd

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 can never be higher 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.

The Important Stuff You Need to Know About Ceiling Fans

Posted on July 11, 2018 by Allison A. Bailes III, PhD in Building Science

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.

Saving Sustainably: Pouring the Slab

Posted on July 10, 2018 by Matt Bath in Guest Blogs

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.

Does Radiant Floor Cooling Make Sense?

Posted on July 9, 2018 by Scott Gibson in Q&A Spotlight

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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