I would like to let you know that your technician that has performed duct cleaning in several of the buildings in Corporate Woods® office park has done an exceptional job. When he has worked in spaces that are occupied by tenants, the tenants are not aware that anything has been disturbed when they return the next day. After the ductwork is cleaned, the sealant that is applied seems to be a very fine product that will stretch the intervals between required cleanings. The before and after pictures really tell the tale. When duct inspections take place, the tenants are again unaware that anything was done when they return the following day. I feel Aardvark performs an excellent service that is cost competitive while being handled in a professional manner.