Home energy audit

Is your home too hot in the summer or too cold in the winter? Did your heating or air conditioning bills take you by surprise last year? You might need a certified professional to conduct a home energy audit.

A whole house energy audit will help you understand your home’s energy consumption and performance, air leakage, and a room-by-room assessment of how you can save money on your heating and cooling energy bills. You may even be eligible for a free or discounted home energy audit based on where you live or your utility company.

What’s involved?

According to RESNET, the Residential Energy Services Network:

A general energy audit is also known as an energy assessment, standard energy audit or detailed energy audit. It expands on the home energy survey by collecting more detailed information regarding the home’s energy usage, as well as a more thorough financial analysis of its energy costs.

The general energy audit also includes diagnostic testing using specialized equipment such as a blower door test, duct leakage tester, combustion analyzer and infrared camera. These tests are done to determine:

The location and number of air leaks in the building envelope.
– How much leakage is occurring from HVAC distribution ducts.
– How effective is the insulation inside walls and ceilings.
– Any existing or potential combustion safety issues.

Is a home energy audit the right choice for you?

Insulation

Improving your home’s insulation by insulating raw spaces, or upgrading to newer and more energy efficient products, can not only save you money on your heating and cooling bills, it can make your home healthier for your family. You’ll feel more comfortable year ’round with improved insulation.

fiberglass insulation

The Department of Energy recommends home insulation as one of the most important steps you can take to make your home more energy efficient:

A qualified home energy auditor will include an insulation check as a routine part of a whole-house energy assessment. An energy assessment, also known as a home energy audit, will also help identify areas of your home that are in need of air sealing. (Before you insulate, you should make sure that your home is properly air sealed.)

Insulation is graded according to an R-value. The R-value indicates the insulation’s ability to resist heat. The higher the R-value, the greater the heat resistance. Choosing insulation with a higher R-value will save you money on your heating and cooling costs. It will also make your home more comfortable and healthier, because better insulation also acts as an air filter in your walls.

Some types of insulation, like spray foam, also act as a barrier against moisture, insects, and pests. Based on your home’s location and construction, a home performance professional will make recommendations to meet your needs and budget.

Improving your home’s insulation doesn’t have to be an expensive project. Focusing on the most important areas of your home, like the attic, will yield a result on your next utility bill. Insulating your home is commonly a one time project. Fiberglass and spray foam insulations can last longer than your mortgage, so your work will pay for itself quickly, and give you a high return on your investment over the life of your home.

The Department of Energy’s “Years to Payback” equation can help you determine your exact return on investment. A good rule of thumb is that insulation projects will pay for themselves in 3-5 years. A professional home performance contractor can complete the job in a day or two. You’ll start saving money immediately.

Your cost will vary depending on the type of insulation you choose and the size of the space you are insulating. The good news is that you may be eligible for tax rebates from your state government, or incentive programs from your utility company, for home energy efficiency upgrades and retrofits. Your home performance contractor can help determine your eligibility and provide you with required documentation.

Is improved insulation the right choice for you?

Home energy efficiency program success and challenges

Home energy efficiency program success and challenges

“City’s energy efficiency program falls short of goals.” A recent article in the Greensboro, NC News & Record by Amanda Lehmert observed the performance of Greensboro’s “Better Buildings” home energy efficiency program. Lehmert found that 1,280 homes owned by low income homeowners received benefits of $4.7 million: a energy audit and $2,000 to $3,000 worth of improvements to their home. That sounds like a pretty good success, but what happens when you look behind the numbers?

Greensboro’s Better Buildings home energy efficiency retrofit and upgrade work focused on the high impact, high return on investment areas of the home: air sealing, insulation, HVAC improvements. One homeowner saw an immediate savings of $50 on his heating fuel bill. He told all of his program-eligible family members. They applied to the program, and received the home energy audit and retrofit work. These families are saving money this heating season, and will for years to come, because of the program. What works?

  • Qualifying homeowners through an initial screening process
  • Hiring local home performance contractors to conduct whole house energy audits
  • Hiring those contractors to make effective repairs and upgrades to the building envelope
  • Using the homeowner’s heating fuel bill as quality assurance verification

These steps are replicable in home energy efficiency programs everywhere, and the homeowner’s immediate savings and word of mouth advertising prove that this approach works.

Residential energy efficiency programs create the market

Greensboro officials estimated that the average homeowner would see a 17 percent reduction in home energy consumption and a corresponding savings in home heating fuel costs. That’s a good deal for any homeowner. Demand was high. At the end of the program 400 low-income families were on a waiting list for 70 remaining contracts. That tells us that a market exists for “bundling” home energy audits and retrofit work.

But that market may be unsustainable. City officials reported that higher-income homeowners who were eligible for rebates and low-interest loans did not participate at the expected rate. 950 fewer households applied for the rebates. 600 homeowners qualified for program incentives but did not hire contractors to do the work. These homeowners were to subsidize part of the program. Their low participation put the program’s overall goals at risk.

Lehmert concludes that:

The lack of interest from homeowners who could pay their own way gets to the crux of Better Buildings’ shortfall in private investment and job creation.

Greensboro-area home performance contractors, on the other hand, suggested that a lack of awareness about the program among higher-income homeowners also played a role.

How a home energy efficiency program succeeds

Greensboro’s Better Buildings program did succeed in connecting home performance contractors and low-income homeowners. These homeowners received a energy audit, typically a $300-$800 expense, and up to $3,000 in home energy efficiency retrofit and upgrade work. These homeowners will receive long term heating energy cost savings. Additionally, they will find their homes are more comfortable and their families are healthier, thanks to air sealing and HVAC system improvements. All of these are quantifiable measures of the Greensboro Better Buildings program’s success.

Future programs should do a better job of marketing available incentives to higher-income homeowners. These homeowners may not know how to start a home energy efficiency project, but they have the means to undertake larger projects, and create local jobs.

Programs can use performance based home energy assessment tools to quickly qualify existing homes and prioritize projects based on the estimated return on investment. This also helps home performance contractors schedule their teams and equipment to work more efficiently.

Programs should devote resources to business development for home performance contractors. Public-private partnerships help create sustainable markets after program funds are exhausted.

It’s well known that once homeowners pick the low-hanging fruit of home energy efficiency they are likely to take additional steps, including major retrofit and upgrade work. Home performance contractors should look at program participants as future customers.

Home energy efficiency program success and challenges are a major part of our larger energy efficiency debate. We know there is strong demand for home energy efficiency, and that there are steps everyone can take to make their homes cheaper, healthier, and more comfortable. Greensboro’s program is a good case study for future programs and for industry professionals looking to grow their businesses.