Cape Fear
Green Building Alliance

Air Leakage

20-40% of the energy used to run HVAC systems is wasted due to air leakage. Unconditioned air enters into the home and conditioned air escapes from the home through every hole, gap and crack. Door frames, window frames, electrical outlets and switches, recessed lights, plumbing penetrations, attic hatches, chimneys, vents and flues are common locations for air leakage. 31% of infiltration occurs through openings in walls, ceilings and floors.

In addition, the ductwork that conveys heated or cooled air to all parts of the house often contributes significantly to air leakage. If not properly sealed, the joints where lengths of ductwork come together, allow heated or cooled air to escape before reaching the registers in your living space. Conversely, leaks in ducts can draw unconditioned air into the system making heating and cooling equipment work harder and longer to maintain desired temperatures.  The result is unnecessary energy consumption and needless expense. Leaky ducts are responsible for about 15% of air leakage in most homes.

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Financial Resources


Progress Energy offers the following rebates: 
  • Attic insulation and attic leak sealing - $375
  • Air duct testing - up to $60 for first unit and $30 for second
  • Air duct sealing - up to $120/unit (central AC and heat pumps)

Insulation and air sealing - up to $500




Paving the Way to Home Energy Efficiency

Call to schedule a presentation about retrofits for your group. Learn how to make your home more energy efficient and save money on your power bills.
910-470-5697 or 910-540-3783

The Retrofit Roadshow is an outreach program of the CFGBA, funded by a grant award from the NC Green Business Fund and ARRA.





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