Green Building Blog

air filter

Are All Air-Filter Ratings Equal?

Posted on September 30, 2008 by Daniel Morrison

Effectiveness Ratings Change, Depending on the Size of the Particles Being Filtered.

Some filters labeled as 99% effective are only 10% effective when you change the sampling method. Particle size matters and so does sampling method. Don't let your lungs take up the slack._

Wrapping up Day 2 of building science summer camp, Dieter Weyel, Ph.D., talked about filters, filtration, and ratings. Turns out there are some pretty important differences. Particles, like everything else, have to obey the laws of physics.

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The Greenest Beverage? Tap water. But What About Adult Beverages?

Posted on August 30, 2008 by Michael Chandler

Bottles are greener than cans, but is beer the greenest choice?

In a quest to discover the most environmentally benign beverage for backyard barbecues, one builder sifted through the options to help us drink greener.

I have nothing against water: I make coffee with it, paddle a canoe in it, and I even drink it every day. But it's not always what my empty hand is looking for when I settle down in the backyard and fire up the Weber.

Greening My Home: Biodiesel

Posted on August 28, 2008 by Daniel Morrison

Air sealing and insulating are a great first step, but switching fuels is a lot quicker and easier. I'll do the insulating after I get a bonus check!

I was standing in the cold on a dark December night, pouring diesel fuel from a five-gallon jug into the side of my house, when it really clicked: Houses consume a huge amount of oil. I had always gotten uptight about gas mileage in my cars and trucks (I had a full-size Ford pickup at the time) but, until that cold night, how much our houses gobble up had never really hit home.

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