Patent ID: 6926602
Filing Date: 2005-08-09
Classification: E04B,F24F

Abstract:
1. A ventilation system for a building crawl space to reduce the moisture content of enclosed air within walls of the crawl space, said system comprising: a fan unit having a fan operated by an electrical motor and suspended from the building floor structure and centrally located and orientated within the crawl space; said fan unit includes at least one inlet grill, a discharge plenum and an outlet grill for moving air within the crawl space through said fan unit to establish relatively high and low pressure areas within the crawl space; inlet vents in the walls, adjacent to low pressure areas relative to outside ambient air pressures, allow for movement of relatively low moisture content outside ambient air into the crawl space; outlet vents in the walls, adjacent to high pressure areas relative to outside ambient air pressures, allow for movement of relatively higher moisture content within the crawl space to the exterior of the crawl space; and a timer unit manually set to transmit a first electrical signal to a control switch to activate said motor for ventilation time periods that are set to optimally reduce the moisture content of the crawl space air.