Multi-season crawl space vent

Ventilation – Having inlet airway – Sleeved vent for ceiling – wall – or floor

Reexamination Certificate

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Reexamination Certificate

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07040979

ABSTRACT:
A vent assembly for a crawl space type vent opening in the foundation wall of a building has a front frame engaging the outer face of the wall around the opening, swappable venting plates for the front frame, and a rear frame engaging the inner face of the wall in the crawl space and connected under tension through the opening to the front frame. A first form of the vent can be installed axially into the vent opening from the outside of the building to replace an existing vent in a finished wall. A second form of the vent is installed vertically into the vent opening in the wall before the opening has been capped, as part of new construction.

REFERENCES:
patent: 3974753 (1976-08-01), Blomgren et al.

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