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Ever wondered how efficient your home is compared to other homes of the same size?
It may sound crazy, but there is a way to find out!
Having a Building Performance Auditor (BPA) come into your home and conduct a home energy audit can not only let you see how your home can potentially improve, but can also give you a way to measure your efficiency compared to a home of a similar size and standard usage patterns by way of a HERS (Home Energy Rating System).
What is a HERS rating? Calculated from 1 to 150, a HERS rating shows you how much energy your home uses in comparison to other homes. The lower your HERS score, the more efficient your home (a home with a rating of 0 means that the home produces the same amount of energy it expends).
To calculate a HERS index, an auditor enters data about the home into a computerized simulation analysis utilizing RESNET Accredited Rating Software to calculate a rating score on the HERS Index
An auditor takes down information about a home and enters the data into RESNET (Residential Energy Services Network) software, including its shape and size. The software will calculate typical usage patterns for a home of the same shape and size, giving the software a base from which to calculate.
A common misconception is that a new home is more energy efficient than a home which has been treated with energy efficient products. Actually, a standard new home has a HERS rating of about 100, while a home which is ENERGY STAR certified has an average score of about 85. This means that an ENERGY STAR certified home is about 15 percent more efficient than a standard home of its shape and size. For every 1 percent more efficient a home is than the standard home of that shape and size, 1 point is deducted from its HERS index. Likewise, for every 1 percent less efficient a home is than the standard home of that shape and size, 1 point is added to its HERS index. Despite being the opposite of conventional logic, it is better to have a HERS rating of 65 than one of 125.
You need not invest in a new home to improve your energy efficiency and increase your quality of living. By calculating your HERS index and making cost-effective improvements, you will be able to: