|  What is Duct Testing?
                Duct testing is measuring the amount of airflow and the  amount of air loss through you ducting.                 Do I Have to Have My Ducts Tested?Duct testing is a state requirement in Orange, Riverside, San Bernardino and Los Angeles Counties in weather zones 8 and higher.                 Who Pays for Duct Testing?The owner of the equipment. The contractor is not allowed,  except under certain circumstances, to pay for the duct testing directly. This  is to remove that incentive to cheat the system by fabricating the results.How Come Now?
 Where your utility money goes                California is having a power shortage. No one wants to  build  new power plants so the way to stretch the existing power plants is to ensure  that HVAC equipment is utilized to its maximum saving potential. For many years  we have been sold on the idea that changing out HVAC equipment is the way to  higher efficiency and energy savings. It is not and has never been. Study after  study shows that an existing system can easily be made more efficient. These  also show that a brand new system rarely, less than 10% of time, achieves the  level of performance that it is designed to perform. Manufacturers regularly  groomed their results on efficiency and installation standard suffered  horribly. The average loss through the ducting in a home varies in the  30%-35% range. That is lost heating and air conditioning and a lower level of  comfort and contributes to poor indoor air quality. The chart on the right is  where the average home's energy use goes.                 Here are some of the study results from around the countryDuct Testing from Pacific Gas and Electric  Here is a .pdf Letter from the Governor of the State of  California 1. Department of Energy Better Duct Systems 2. ACCA Standard 5 Quality Installation Specification 3. Static Pressure Losses Non Metallic Flexible Duct 4. Residential Duct Systems for New and Retrofit Homes 5. Measuring HVAC Systems  6. Improving Forced Air Heating Systems 7. Berkeley National Laboratory - Register Closing Effects 8. Hvac Energy Efficiency Maintenance Study SOCAL Edison 
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