Make sure that the company has the proper equipment and enough HEPA filtered vacuum power (2,000 CFMs or more), to properly clean your air ducts. Be weary of companies that use small vacuum units that have a small rotating brush on the end of a small vacuum hose with a typical airflow of 150 to 300 cfm or less. Proper air duct cleaning vacuums are negative air machines with 2,000 CFMs have 8 inch to 14 inch or larger, vacuum hoses to capture large quantities of dust and debris.
Chances exist that lint that has in fact been restricting the exhaust vent over a prolonged time period can cause overheating which in turn can cause a fire. The establish of lint that occurs over a prolonged amount of time is not merely a fire threat, it is also a clothing dryer problem that gradually steals the energy efficiency of the clothes dryer and gradually cost you significantly more money.
We use Rotobrush aiR+ professional air duct cleaning equipment (rotary brush and vacuum) and believe very strongly that this is the best equipment to clean the air ducts in your home.  Our equipment features a camera system so that if you would like, you can see what we are doing as we are doing it.  The Rotobrush aiR+ is designed specifically to handle the soft, flexible ducts in homes in the South. We are able to clean air ducts by inserting the rotating brush into the duct. With the brush rotating at 450 rpm, it loosens any debris that may be stuck inside. While the brush is scrubbing the walls, the vacuum sucks up the debris, leaving your air ducts clean.
"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." 
Nowadays most houses have a central air conditioning system linking air ducting to move conditioned indoor air throughout the house. Gradually, the air system and the linking air ducting will collect dust and other contaminants, which can trigger the blood circulation of unclean and contaminated indoor air through your house. Out-of-sight and out-of-mind health products that we do not believe much about are filthy air system and a duct which could be the unhealthiest product in our house.
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.
"Amazing detail and care put into the work of inspecting my soon to be home. I now know exactly hat to expect with no surprises and I have a running head start at repairing all the little things I need. I'm now 100% confident moving forward knowing that New Home Inspections completed this service for me. The experience working with these professionals was AMAZING! HIGHLY RECOMMEND! "
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