The first step is to determine your existing utility costs for all fuels coming into the building. For Minneapolis this is likely electricity and natural gas, which are delivered by two different utilities. This makes it easier to separate out those costs. Further analysis can determine the end uses for those utilities (space heating, water heating, base use, etc.) Obtain at least 12 months of past usage.

This information would be helpful for the second step: get an energy inspection/audit on your home. Like many things, there are many types and levels of energy audits. The local utilities offer subsidized services, which might be sufficient. This might be a good place to start however often a more thorough and detailed service serves the owner best.

A more advanced and thorough energy inspection is a Home Performance Energy inspection. This will include mechanical safety testing for carbon monoxide and draft, house depressurization (also for safety), a blower door test, infrared thermal imaging with clear documentation, pressure testing to define the thermal barrier of your home and a written work scope specific to your home. This advanced level of testing can cost more but with many things, cheaper cost is not always the best route. You should look for Building Performance Institute certified inspectors.

In the end, you will want information that helps you direct your energy towards the most effective projects to make your home more energy efficient. That list will depend on the existing utility bills, what the energy inspection discovers and will likely include low cost easy things as well as projects that need a larger investment.

Bruce Stahlberg
Affordable Energy Solutions, Inc.