Client wanted estimate on cleaning ductwork, however, ductwork is square duct board and is older. Advised client that ductwork should not be cleaned because it could fall apart during cleaning process. Explained to client that we could install an air scrubber to kill any future growth that is growing in ductwork, but it would not remove it. Also, drain line is condensating above ceiling and should be insulated. Client needs to go over options with property manager and will get back to us