Abstract: A ventilation conduit is provided, the ventilation conduit being configured to be installed in a building structure with cement poured on said conduit. The ventilation conduit is configured to have a profile section comprising a plurality of layers, a first layer being of a first material and a second layer being of a second material having anti-corrosion properties. The first material may be any of galvanized steel, aluminum or stainless steel and the second material may be a polymer-based material. The layers are arranged in a configuration having periodic waves and sealing regions in a hook configuration. An anti-corrosion coating and a thermal insulation membrane may be applied on the first and second materials. A method for processing and installing a ventilation conduit is further provided, the method allowing the processing of ventilation conduits as described above.

Abstract: There is provided a heat exchanger system comprising a housing defining a heat exchange compartment in which are extending a plurality of circular flexible pipes including radially extending fins, the fins defining a helical pattern along the length of each of the circular flexible pipes. There is also provided a circular flexible pipe having radially extending fins, the fins defining a helical pattern along the length of the circular flexible pipe. There is further provided a method and an apparatus for manufacturing a circular flexible pipe having radially extending fins, the fins defining a helical pattern along the length of the circular flexible pipe.

Abstract: There is provided a heat exchanger system comprising a housing defining a heat exchange compartment in which are extending a plurality of circular flexible pipes including radially extending fins, the fins defining a helical pattern along the length of each of the circular flexible pipes. There is also provided a circular flexible pipe having radially extending fins, the fins defining a helical pattern along the length of the circular flexible pipe. There is further provided a method and an apparatus for manufacturing a circular flexible pipe having radially extending fins, the fins defining a helical pattern along the length of the circular flexible pipe.

Abstract: A computer-implemented information analysis and display system, called a linguistic filter, and method is provided to dynamically generate and display topics representing the linguistic content of documents in a file system. The documents may be user-selected. Also, the user operates a user computer to select one or more of such dynamically generated and displayed topics, preferably using a graphical user interface. The linguistic filter displays document identifiers corresponding to those documents that are described by one or more of the topics selected by the user. The file system may be local, or remote, or both. A user may select for display only those topics representing the linguistic content of documents that are written in one or more user-selected natural languages. Also, topics of documents written in a natural language may be displayed in relation to such natural language. The linguistic filter displays a graphical user interface including a document window and a topic tree window.