conditioners - The Environment Report

Matthew Grocoff says a whole house fan gives the same comfort as you would have with an air conditioning system. (Photo courtesy of Greenovation TV)

Energy efficiency is on the mind
of a lot of homeowners. They’re
starting to question everything
about their homes, even the need
for air conditioning. Lester
Graham met with some homeowners
and an energy-efficiency expert
to talk about a different approach
to cooling a house:

Transcript

For some people, air-conditioning just feels a little unnatural. I mean, it’s a refrigerated room, right?

There are older ways of cooling a house that are cheaper and use a lot less electricity.

Matthew Grocoff is with Greenovation TV. His website suggests all kinds of ways to make homes more green.

We met at a house in a tree-lined neighborhood of century-old homes in Ann Arbor, Michigan.

(sounds of house and stairs)

He wanted to show me an idea that’s like throwing open the windows and pulling in a cool summer breeze.

It’s called a whole house fan.

Grocoff: “We’re at the home of Jacinta Beehner and Thore Bergman. Thore actually installed this fan himself. It cost about $250 – about $9500 less than the quote that they got to install an air conditioning system in their house. And, this summer, they have not had to turn on their window units at all.”

Now Thore is not a carpenter. He’s a university researcher who studies monkey vocalizations. But, he decided he’d try to install the big fan in his ceiling on his own.

Bergman: “It was fairly easy. It took a couple hours. The tricky thing was – we have an older house that had layers of plaster and wood in the ceiling. So, cutting through that to make the hole took a little more work that it might in some houses. But it wasn’t too bad.”

Beehner: “I have to admit, I didn’t really believe that maybe he could install it himself. And yet, he did a great job. And I am the biggest fan of the whole house fan.”

Grocoff: “So, you’ve got the Beehner-Bergman fan club here. And this is interesting, because the goal, for most homeowners, is to get the house to a comfortable 72 degree temperature. And, it’s kind of strange that when it’s 65 degrees outside, and it’s 80 degrees inside your house, that we’re turning on an air conditioning unit when the air outside is actually colder than the air conditioning unit.”

(sound of fan turning on)

Bergman: “One drawback is the noise. Which, we’ve gotten used to. We kind of like it for sleeping – it blocks some of the street noise. We’re standing right underneath it, and it’s kind of hard to talk.”

Beehner: “But, we also have a baby. So the whole house fan serves as white noise, which really helps us move around upstairs while he’s asleep.”

Grocoff: “Those people who are not looking for that white noise sound, like Jacinta and Thore are for their baby, they’re going to be able to get something that’s quieter, more efficient, more insulated, that’s going to be virtually silent, at the higher price points.”

There have been some surprises along the way.

Jacinta says, you have to keep in mind – anything in the night air will be drawn into the house.

Beehner: “One night, we actually did turn it on, and within about one minute, our entire house was filled with the smell of skunk.

Grocoff: “So, if you’ve got really good, deep skunk smell, you know the fan is working. Another possible drawback is, with the air, you’re bringing in any kind of dust, pollen, anything else like that.”

But, Grocoff says, overall, this big sorta-box fan in the ceiling really pulls the hot air out of the house and pulls the cool air from outdoors into the house.

Now, these fans don’t work everywhere.

If you live in an extremely humid area, or a region where it never really cools down at night or in the morning, it might not be a good fit.

But for areas that enjoy cooler mornings and evenings in the summer, Grocoff says this is a good alternative.

Grocoff: “With a whole house attic fan, you’re going to get the same comfort as you would with an air conditioning system. But, on a dollar-for-dollar basis, the cost for running an air conditioning system is 20 cents to 30 cents every hour that you have that turned on. For a whole house attic fan, you’re talking about a penny to a nickel an hour.”

There are all kinds of designs besides the big box fan types.

You can go to a home improvement store, your heating and cooling installer, or do some research online at greenovation.TV or just type in whole house fan in Google. You’ll find plenty of places wanting to sell you there version of a newly popular old idea.

For The Environment Report, I’m Lester Graham.

Transcript

“Hi there! This is Al.”

Temperatures were expected to hit 105 degrees on the day I visited Al Mason’s Northern
California bungalow. But, standing in his very cool living room, he wasn’t too concerned.

Al Mason: “During the summer without the air, it was miserable.”

Amy Standen: “What’s it like now?”

Mason: “Oh it’s wonderful.”

That’s because Mason just bought himself a $10,000 central AC and heating system.

(sound of motor starting up)

Installer Jeff Scalier of the Blue Star Heating and Air Conditioning Company takes me
outside to show off the motor.

“This particular unit, I call it the Cadillac. It’s an HDL is the name of the unit, it’s side
discharged.”

New units like this are about twice as energy efficient as those sold thirty years ago.
That’s when the 1970s oil embargo inspired a slew of federal efficiency rules.

But Al Mason’s brand-new AC system still uses a lot more electricity than it needs to. At
least, that’s what John Proctor says. He’s an air conditioning entrepreneur in San Rafael,
just north of San Francisco.

“Air conditioners are designed one size fits all for the whole country. So you have a
hammer where you really would like something a little more precise.”

In other words, different climates require different air conditioners. For example, the day
I met John Proctor, it was about 75 degrees outside, maybe 25% humidity.”

“There’s a reason why we live here!” (laughs)

Meanwhile, about 3,000 miles east, residents of Tampa, Florida were wiping their brows
in 80% humidity. In other words, a completely different climate, where air conditioners
have a different job to do.

“In South Florida you have to do a lot of dehumidification, whereas in California, you
don’t have to do any dehumidification at all. So what they’re doing is taking moisture
out of the air and dumping it down the drain.”

In other words, because air conditioners are built for all climates, they don’t work
perfectly in any climate.

That fact inspired Proctor – with funding from the state of California – to design AC
systems for three different climates – the hot dry west, the soggy southeast, and the more
temperate Midwest. So that’s one model for Phoenix, another for Tampa, and a third for
St. Louis. He built them in an attic workshop upstairs from his office.

“So where does that data point show up on the graph?”

Proctor says these climate-specific units can use as much as 20% less electricity than the
one-size fits all models. But that doesn’t mean we can expect manufacturers to start
making them any time soon.

“From a manufacturing perspective, if you can just make lots of one air conditioner,
it’s easier, it’s cheaper. And that’s how they’re set up to do it.”

That’s why Proctor, along with California energy officials, went to Washington earlier
this year. Their goal was to get Congressional support for new, regional AC standards.
And it worked.

But putting these standards into law is another step. That’ll take a ruling from the Federal
Department of Energy – something, Proctor believes, is unlikely to occur until next
administration takes the White House.

For The Environment Report, I’m Amy Standen.

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