Along with your Home Energy Score you also get a list of cost-effective energy upgrades for your home. Click here for a larger version of the image.

For most men of my generation a first car was like a right of passage. The car could be an old beater, or a muscle car; it didn’t matter so much as long as we felt unique driving it. And we all knew the basic nomenclature—horsepower and miles per gallon.

I have a dream that someday homeowners across the land will feel about their houses and apartments the same way people of my generation felt about their first car. They will all know the basic nomenclature—kilowatt-hours and/or Btu per square foot per year. Or something like that.

This Tuesday I found out my dream is becoming a reality. The Department of Energy announced a project, the Home Energy Score, to:

• increase the energy literacy of homeowners;

• support a growing segment of the economy—people who do energy audits and retrofits on houses (think jobs, jobs, jobs);

• put our nation on a path of energy independence through conservation;

• make our planet a healthier place to live in; and

• do all of the above without creating any new legislation or spending taxpayer dollars.

The project is being piloted in nine cities throughout the United States and the plan is for it to go national by later 2011. The key components of the program include:

• a set of Workforce Guidelines for people entering the home energy field—what they need to do the job and do it well, and gain the trust of their customers;

• a software program that will allow home energy professionals to do a one- or two-hour audit of a home, give it a Home Energy Score from one to ten, compare it’s energy use to its neighbors, and immediately provide the homeowner with a list of cost-effective energy retrofit options; and

• low interest loans from qualifying lenders to finance the retrofits.

Soon every homeowner and me will be able to brag about our houses to friends, relatives, coworkers, and neighbors—as we used to brag about our cars. “I have a 1951 California Bungalow with three bedrooms, two baths, and it only uses 500 kilowatt-hours a year for heating and cooling. It’s got a Home Energy Score of 9. So, what are you living in?”

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How much air is your house leaking? Are you unknowingly slurping in dirty air from your garage and attic? Perhaps a blower door test can help you find out.

"I went to the ServiceMagic Web site that I learned about editing a Home Energy article," says Tom. "Within less than a minute after I entered some basic information about my house and what I was looking for in the way of an energy audit, the phone rang." It was Sustainable Spaces, a home performance contractor located in San Francisco. Tom made an appointment for his audit for the next week. "They were offering a 'Stimulus Special' for $395."

The house Tom shares with his partner Dmitri was built in 1907. "The home has never been remodeled," says Tom. "We recently had the furnace replaced with a hot water radiant system. We have been careful to keep to the original features of the home, so we got our radiators from buildings built around the same time that used to be part of the heating systems in buildings at Fort Baker." They also installed a renewable energy source. "We installed photovoltaic (PV) panels on our roof, but we should have had the audit first to show us how to use less energy and save on the PV.  Our annual true-up statement says we owe $75 for electricity, but I want to get that down to $0!"

Rob Mitchell, an experienced contractor who knows a lot about Bay Area houses, came with two younger men for an audit of Tom and Dmitri's 102-year-old home. The crew closed all the exterior doors and windows, installed a "blower door" in the main doorframe, and depressurized the house. Immediately, dust and insulation particles began to pour through the "pocket doors" from the attic. After taking some measurements to get a general sense of how leaky the house is, and blocking some of the major air leaks, the crew from Sustainable Spaces then pressurized the house. "We walked around the house with a liquid pencil, which showed there is airflow around switch plates, gaps in the baseboard where the home is connected to the outside, and the cabinet in our kitchen where there used to be 'torpedo tubes,' which used to hold hot water heated by the wood stove, and other places" says Tom.

So the old house has some problems with air leakage, which means heating energy being lost to the outside. The crew also found out that the humidity in the kitchen was 20% higher than that on the outside of the house. "We both took showers that morning, and I had a cup of hot tea," says Tom. That was enough to keep the humidity high a few hours later.

Since the home has no mechanical ventilation, moisture build up could lead to mold growth on surfaces in the living spaces, or-even worse because it is hidden-within the walls. Mold can degrade building materials and create poor indoor air quality. Tom has allergies and a moldy house could make it difficult for him to breathe. Since Tom is living in the mild climate of the Bay Area, where we can open windows and get fresh air other ways in our leaky houses, the moisture may not hang around long enough to be a problem. If he lived in a cold climate such as Minnesota's, or a hot-humid climate such as Atlanta's, fixing the air leaks in his house without adding mechanical ventilation could create a "sick house", meaning one with poor indoor air quality due to mold.

"We won't get the report until next week," says Tom. The report will include specific numbers for air leakage from the house to the outside-or in this case between the living spaces and the attic and basement. Too much air flow means lost energy and too little means a sick house. The report will also give a range of measures that will make Tom and Dmitri's house healthier and more energy efficient. "We'll decide what measures we want done when we get the report. We made our heating system more efficient with the radiant system that heats the living spaces and provides us with hot water. We use half the gas now to heat water than we did before. So spending a lot more on fixing the building envelope doesn't make so much sense to us right now. We'll probably fix the big leaks by air sealing around the attic. And we may insulate under the floor between the living spaces and the basement."

"I wanted to have our house audited mostly because I'm curious," says Tom. "And we want to save energy." But from now on when Tom talks about home performance, and the importance of healthy and efficient homes, it will take on a whole new dimension-the homeowner's perspective.

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