Abstract: The present invention provides a fan unit centrally located within a crawl space. The fan unit includes a fan, a fan motor, an inlet grill, 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 vents and to also create a positive pressure to force air out of the crawl space through wall outlet vents. 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. A temperature sensor is used to turn the fan unit off when the crawl space air temperature gets too low.

Abstract: A fan unit centrally located within a crawl space includes a fan, a fan motor, an inlet grill, 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 vents and to also create a positive pressure to force air out of the crawl space through wall outlet vents. 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. A temperature sensor is used to turn the fan unit off when the crawl space air temperature gets too low.

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.

Abstract: According to the present invention, a hitch and receiver system provides at least an additional vertical box receiver when a conventional box receiver of the vehicle hitch is in use to provide draw bar support for the hitch ball. In a second embodiment, an additional horizontal box receiver is also provided for the hitch and receiver system. The additional box receivers are used to hold and support various accessory devices. In some cases the hitch ball can be used to tow a trailer without removal of the accessory device. The unique accessory device of this invention includes one of a hitch guide accessory device, an access platform and step accessory device, and a cargo cage accessory device. The combination of a hitch and receiver “system” and an accessory device provides the “assembly” of this invention.

Abstract: According to the present invention, a hitch and receiver system provides at least an additional vertical box receiver when a conventional box receiver of the vehicle hitch is in use to provide draw bar support for the hitch ball. In a second embodiment, an additional horizontal box receiver is also provided for the hitch and receiver system. The additional box receivers are used to hold and support various accessory devices. In some cases the hitch ball can be used to tow a trailer without removal of the accessory device. The unique accessory device of this invention includes one of a hitch guide accessory device, an access platform and step accessory device, and a cargo cage accessory device. The combination of a hitch and receiver “system” and an accessory device provides the “assembly” of this invention.