On the other hand there are many more air duct cleaning companies that will properly clean the air system and air ducts and use commercial negative air duct cleaning vacuums with at least 2,000 CFMs of vacuum power and utilize proper agitating tools to move the contaminates within the duct work to be captured with HEPA filters and contained by the air duct cleaning vacuum equipment.
Locally we service the cities of Jacksonville, Jacksonville Beach, Atlantic Beach, Neptune Beach, Orange Park, Fleming Island, Green Cove Springs, Keystone Heights, Penny Farms, St. Augustine, St. Augustine Beach, Ponte Vedra Beach, Nocatee, Hastings, Fernandina Beach, Callahan, and Hillard all located within the counties of Clay, Duval, Nassua, and St. Johns. Call for Free Estimates at (904) 245-1594
Locally we service the cities of Jacksonville, Jacksonville Beach, Atlantic Beach, Neptune Beach, Orange Park, Fleming Island, Green Cove Springs, Keystone Heights, Penny Farms, St. Augustine, St. Augustine Beach, Ponte Vedra Beach, Nocatee, Hastings, Fernandina Beach, Callahan, and Hillard all located within the counties of Clay, Duval, Nassua, and St. Johns. Call for Free Estimates at (904) 245-1594
"Energy is consumed by HVAC systems through a number of processes. Air is typically distributed through the ductwork via an electrically‐powered fan. Cooling coils remove heat from the air. Heating coils add heat to the air. Through normal HVAC usage, particulates in the air slowlycollects on the surfaces of various HVAC components, resulting in a gradual loss of energy efficiency. Some loss of efficiency via a single dirty component may be minor. When the loss through each component is added up, however, the impact could be considerable. Generally, the greater the buildup, the greater the energy loss. Removal of the buildup of particulate on HVAC components restores energy performance to the system." 
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