Crawl space ventilation system

Details Crawl space ventilation system Crawl space ventilation system

2005-08-09

2005-08-09

Joyce, Harold (Department: 3749)

Ventilation

Having both inlet and outlet airways

Including automatic control means

C236S04400R, 56, 56, 56

Reexamination Certificate

active

06926602

ABSTRACT:
A fan unit being suspended from a building floor structure within a crawl space. The fan unit includes a fan, a fan motor, an inlet grill, a discharge plenum and an outlet grill. A timer connected in the power supply activates the fan motor at periodic predetermined time intervals to move the crawl space air through the fan unit. The fan unit is located and orientated to create a negative pressure to pull air into the crawl space through wall inlet grills and to also create a positive pressure to force air out of the crawl space through wall outlet grills. An outside humidity sensor can be used to insure the outside air has a lower percent humidity than that desired in the crawl space and an inside humidity sensor is used to turn the fan unit off if the crawl space humidity is below an acceptable limit.

REFERENCES:
patent: 3368756 (1968-02-01), Edwards
patent: 3575641 (1971-04-01), Long et al.
patent: 4665351 (1987-05-01), Nyberg
patent: 4702149 (1987-10-01), Speer
patent: 4829882 (1989-05-01), Jackson
patent: 4877182 (1989-10-01), Pugh et al.
patent: 5253804 (1993-10-01), Sarazen et al.
patent: 5626288 (1997-05-01), Huber
patent: 6468054 (2002-10-01), Anthony et al.
patent: 2003/0190885 (2003-10-01), Johnsons, Jr.

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