Attic Savings - Estimating the Financial Benefits of Your Attic Upgrade
You can get substantial attic savings by increasing the amount of insulation to recommended levels for your location, air sealing cracks, and openings, sealing ducts, sealing chimney flashings, and ensuring the proper ventilation through the vents to avoid moisture and mold issues can easily reduce your heating and cooling bills by 25% to 45% (Source: DOE).
Remember that the amount of heat actually lost will depend on where you live and how cold your attic gets. An easy rule for insulation is to insulate to R19 if you live in the southernmost parts of the US and R49 if you live in the northernmost.
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