energy at home

Umbra on burning wood and gas

Hey Umbra, I’m from Quebec and there is a movement underway to prohibit the new installation of wood burning fireplaces. I’m curious about how much carbon is produced by burning a cord of wood in a fireplace, compared to a tank of gasoline burned by an automobile. Ron F.Montreal, Quebec How does firewood stack up? […]

Eric Corey Freed extrapolates on his recommendations in the NYT

Monday I wrote “Ignore NYT’s Green Home column.” I was critical both of the author Julie Scelfo and Eric Corey Freed, the author of Green Building & Remodeling for Dummies. But having corresponded with Freed, it seems that his recommendations were taken somewhat out of context. He in fact provided a rough list of 20 […]

Umbra on hot tubs

Cool your jets. Dear Umbra, We purchased a home with an existing four-person, 500-gallon wooden hot tub with a two-stage electric pump. When should a hot tub be turned off to save energy? City Light recommends that our tub be on a timer to save electricity; our tub manufacturer insists that, unless we’re not using […]

First five steps to a greener home are not what the article says

On Friday, the New York Times Andy Revkin directed his readers to the new column, “The Green Home” by Julie Scelfo. The column he linked to, “Five Beginners’ Steps to a Greener Home,” is not terribly useful at all — indeed I would say it is counterproductive. Only one of her five steps make part […]

Smart infrastructure, courts v. coal, and energy efficiency all over

• The Wall Street Journal has a long and fascinating piece that expands the "smart" conversation beyond the grid to discuss smart infrastructure generally, including smart transportation and smart water infrastructure. Turns out information technology can help out all sorts of places!

• Largely unnoticed by the media, EarthJustice won a big victory in court recently:

A federal court has ruled that the U.S. Environmental Protection Agency must close a loophole that -- for more than 25 years -- has made it easy for mining companies, coal ash dumps, and a host of other polluting industries to skip out on costly cleanups by declaring bankruptcy. The case concerned EPA's failure to issue "financial assurances" standards that ensure that polluting industries will always remain financially able to clean up dangerous spills and other contaminated sites.

• Homebuyers are starting to specifically request green, energy-saving features.

• PBS recently did an excellent hour-long documentary on "clean coal" called Dark Energy: The Clean Coal Controversy. You can watch the whole thing online at the linked site.

• This is pretty cool: the first zero-emission research station in the Arctic. Nice video:

What can families do to reduce home energy use?

My name is not Earl. I've crossed everything off my list, and I'd like to share what I have learned about home weatherization.

I'll start with my results to date. I spent roughly $400 and achieved a 60 percent reduction in my gas-heating bill for the month of February. That huge reduction is testimony to what an energy hog my house was before I started this project.

My goal is an 80 percent reduction but that last 20 percent isn't going to come easy. To obtain that I will need to install a solar hot water panel in the one sunny patch of yard I have, a heat exchanger on the first floor shower drain, and possibly one of these bad-boy heat pumps. Our hot water accounts for almost 20 percent of our gas use.

Here's my list of weatherized add-ons:

Does daylight savings cut energy use? Don’t lose sleep over the question

Daylight savings goes into effect this weekend, and with it comes the semiannual arguments over whether the program actually saves time and energy. Those of us who can change our clocks correctly can spend our extra hour parsing new claims that extending daylight savings saves energy and money. What’s that? We lose an hour? Then […]

How to save the planet with heated clothing

I spend a lot of time in a secret underground laboratory (basement workshop/office). It's my version of a Man Cave. In place of a big screen TV, pool table, and bar, it has (along with every power tool known to modern man) an oscilloscope, a table saw, and a box of red wine sitting on top my computer tower.

It's also completely unfinished (exposed studs) and unheated, with no insulation in the walls whatsoever. The temperature at my desk is presently 52 degrees and thanks to the thermal mass of the concrete walls and floor, will remain at this approximate temperature for the four coldest winter months. It's 39 degrees outside as I write. The cave analogy isn't too far off.

Staying warm while sitting on one's ass in front of a computer for hours on end in a 52 degree room can be challenging.

Umbra on heat and pipes

Dear Umbra, In your video advice, you warn people not to set their heat below 55 degrees for fear of frozen pipes. My question is, “On what do you base the 55 degree number?” … I “core heat” with a stove in the fireplace. It heats the core of my house (kitchen and family room) […]