Homestar Building Performance


Serving Sonoma County
and surrounding areas

Save Energy - Save Money
Save the Environment

Energy Information

Whole House Energy Evaluation

Your home has a lot to tell you when it comes to its ability to provide comfort, safety and savings on energy costs. A whole house energy evaluation will provide a detailed look at where your energy dollars could be going out the window, or any other place air gets in, or out. How efficient your current heating and cooling system is can depend on a variety of factors that the energy evaluation can provide.

Keeping warm or cool is not all that an energy evaluation can tell you. A healthy environment means clean air with no toxins or carbon monoxide leaks that can cause illness, or even death. Our evaluation will point out potential problems and allow you the opportunity to live in a healthy home.

What we look for during an energy evaluation:

Whole House Energy Evaluation
  1. We visually inspect the building.
  2. Our infrared thermo graphic instruments will identify the efficiency of your home’s insulation. We look for evenness of distribution and areas with a lack of insulation.
  3. Our Blower Door test will show us how airtight your home is and where the air leaks are occurring.
  4. Our heated and cooled air travels throughout the home via ventilation systems. We check to ensure the system meets safety requirements and that there are no problems with air leakage.
  5. We physically check all gas lines from home entry to the stoves, water heaters and gas fireplaces in search of leaks.
  6. We will let you know whether or not your heating system needs servicing.
  7. Our evaluation will also look at appliances to let you know whether or not a possible lack of efficiency is reason to consider a new energy efficient purchase.

Our certified inspectors will help you to understand your home’s energy uses and identify problems that help to keep energy use and cost high.

Air Tight Home

Calibrated Blower Door Test It is important that your home be sealed right to minimize energy loss and that it has the proper ventilation to keep the air you breathe healthy.

Newer homes are built to modern standards that have helped to minimize air leakage while older homes tend to be a bit more drafty, in part due to older building materials like single pane windows and furnaces that don’t meet the rigid standards of today’s equipment. Construction techniques from the past didn’t have the quality of insulation that current builders are installing and that can mean air leaks through walls, floors and ceilings.

Our certified inspectors will help you see where possible leaks can occur and they can recommend equipment that can help to improve your energy consumption and cost.

Infrared Testing

Energy loss can be all around us, but it is difficult to see which is why we use an infrared thermography to give us a visual of where energy goes. It is a lot like wearing 3D glasses to see a movie, without them the visual just isn’t the same.

This test will help to identify those areas where the temperature fluctuates. You will literally see your money going out a crack or window, which can be resolved with a bead of caulk or a new window installation. We will take snapshots of the home to pinpoint where cold or hot air is moving into and out of your home.

Infrared Thermology works best when there is a temperature difference between the indoors and outdoors temperature. Our certified inspectors can help to understand the best time to perform this test.

Blower Door Testing

Blower Door Smoke TestIn order to determine where air leaks occur, we perform a blower door test. The blower is an exhaust fan mounted to a flexible panel that is inserted in the front door frame. The fan draws air out of the house while we measure the air pressure. As low pressure air is drawn out of the house, high pressure air will be drawn into the home through unsealed cracks and openings. Our technicians will use a smoke pencil to determine where air leaks are present.

Our certified technicians will use a calibrated door to determine the overall tightness of the building and the amount of air leakage. This test will provide an effective measure for how well a home is sealed.