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.

Nowadays most homes have a central air system with connecting air ducting to move conditioned indoor air throughout the home. Over time, the air system and the connecting air ducting will accumulate dust and other contaminates, which can cause circulation of dirty and polluted indoor air through your home. Out-of-sight and out-of-mind health items that we don’t think much about are dirty air system and air ducts which could be the unhealthiest item in our home.
My A/C broke down so I called Waychoff's A/C to find out their terms and conditions and time frame for installation. It was really fast and professional service. I got price quite on front and installation took place next day. I have to say that installation crew Tim and Joe did very professional and attention to smallest detail job. It was very impressive. If someone interested - they provided military discount, 12 month financing with 0% through WellsFargo. Everything was done within 24 hours. A/C works good for now and it is very nice to have new one in our house. The garage unit is very quite!
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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