Ventilation fan (ventilation system)

Details Ventilation fan (ventilation system) Ventilation fan (ventilation system)

F - Mech Eng,Light,Heat,Weapons

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F04D 25/08 (2006.01) F04D 25/14 (2006.01) F24F 7/013 (2006.01) F24F 13/18 (2006.01) F24F 13/20 (2006.01)

Patent

CA 1049985

TITLE OF THE INVENTION: Ventilation Fan (Ventilation System) ABSTRACT OF THE DISCLOSURE: A ventilation fan (ventilation system) which may be readily installed regardless of the length of a ventilation hole formed through the wall of a building even when the wall is of the double-wall type having an air insulating layer formed between the outer and inner wall members. The members of a duct frame are prefabricated in a factory and assembled at a job site in order to reduce the dimensions of the package, thereby reducing the packing and crating, storage and transportation costs.

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