Most ductwork is located in your attic and ceilings and is also fairly very easy to obtain. However, if your ducts are within a tough-to-get to crawlspace or powering partitions The work will most likely cost much more due to the trouble of achieving numerous portions of the ducts. http://israelxkxkw.timeblog.net/14019904/facts-about-air-duct-cleaning-logos-revealed