A method for forming a duct access region through one side of a previously installed air duct, wherein the air duct has an air flow with an air flow direction by inserting an aerosol injector into a previously installed air duct through the access region. The aerosol injector includes a liquid tube having...http://www.google.fr/patents/US7851017?utm_source=gb-gplus-shareBrevet US7851017 - Method and apparatus for duct sealing using a clog-resistant insertable injector
Method and apparatus for duct sealing using a clog-resistant insertable injector
