What Is a Home Energy Audit?

It would be great if our homes came with an Energy Monitor
like the one on this Toyota Prius! From Flikr

If you've recently moved into a new home, or have noticed a sudden spike in your current home's utility bills, it may be time for a home energy audit. (Also called an assessment.) This in-depth test can help you pinpoint areas in your home that need to be upgraded, repaired or replaced.


Before the Energy Audit

You may have already noticed a gap in the weatherstrip around the front door, or windows with increased condensation. Ask family members if they've noticed any drafts, or rooms that always seem to be a different temperature from the rest of the house. Have copies of utility bills for the past year, or ask your utility to provide a summary. All of this information will help the auditor zero in on problem areas.

During the Audit

After reviewing the info you've provided, the auditor may have some questions about your family's behavior, hours and habits. Discovering that certain rooms are rarely used, or that some lights are rarely turned off, can lead to suggestions for reducing energy consumption.

This thermal image clearly shows
heat loss around the door. From Flikr

The inspector should go room-by-room through your home, ideally with a thermal imaging camera. With this device, he or she can find the hot spots or cold zones that indicate problem areas. The auditor should thoroughly inspect exterior windows and doors, ducts, and vents for air leaks. Many auditors will include the garage, crawlspace and attic areas, as these are common (but often overlooked) sources of energy loss.

After the Audit

Your inspector should provide you with a complete report on your home that includes recommendations for improvements. These may range from new weatherstripping and motion-activated light switches to replacing windows or adding insulation. Many of these upgrades will be simple DIY projects, while others may require a contractor, HVAC tech or an electrician.

If you're interested in an audit, ask your utility if they offer free or discounted inspections, or if they have a list of recommended professionals. The information you get from an audit can help you save as much as 20% on your utility bills!