The ducts that are part of central heating and cooling systems offer one of the best opportunities to increase your energy efficiency, increase your comfort, and manage your energy bills. Studies indicate that 10%-30% of the heated or cooled air is lost-along with the money spent to heat or cool that air-through leaky ducts. Properly sized, installed, and sealed ductwork will make your heating and cooling systems significantly more efficient. For more information, download our brochure titled Why is Duct Testing Important? (PDF, 413 KB)


Duct testing is strongly recommended by PG&E when a new air conditioning unit is being installed, or when you are having an existing system serviced. If the existing duct system is leaky and inefficient before the new unit is installed, it will still be leaky and inefficient after the new unit is installed-unless the ducts are tested and sealed by a qualified contractor. It does not make sense to install a new, energy-efficient air conditioning unit unless the duct system is also energy efficient.

Duct Replacement