Ventilation fan (ventilation system)

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

1975-12-04

1977-02-08

Wayner, William E.

98116, 98114, F24F 1308

Patent

active

040066720

ABSTRACT:
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.

REFERENCES:
patent: 1931156 (1933-10-01), Persons
patent: 2355836 (1944-08-01), Willey
patent: 2837021 (1958-06-01), McLarty
patent: 3479947 (1969-11-01), Myers

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