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Frequently Asked Questions
What You Should Know When Selecting a Company
to Clean Your Ventilation System
- Is the cleaning of ventilation systems the company’s primary business?
- Are rotating brushes and compressed air used to dislodge contaminants from within the system?
- Is the entire ventilation system cleaned, including the air handling unit, the supply trunk and all branches leading to and including the registers, all return ductwork and intake grilles, and all other internal components of the system?
- Are collection units (vacuums) strong enough to maintain the system under negative pressure during the cleaning process, to prevent contamination of occupied spaces and to effectively remove contaminants from the system?
- If vacuum units being used are exhausting air inside the home or building, is the final stage of filtration HEPA and are the HEPA filters certified DOP tested to be 99.97% efficient to 0.3 microns in particle size based on the volume of air being produced by the vacuum unit?
- Is a Video Inspection System used to enable you to view the effectiveness of the cleaning process to see exactly what you are paying for?
- Proper cleaning of ventilation systems requires a certain amount of time. Commercial and industrial projects can take several days to several months to complete. Single family homes normally require 3 to 8 hours (with a crew of two technicians) depending on the size of the home and configuration of the ventilation system. Does your company spend the time necessary to perform the cleaning properly?
- Is leak detection performed to make sure your system is properly sealed?
- Is the company a certified member of the National Air Duct Cleaners Association (NADCA)?
- Is the company a member of the Better Business Bureau?
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