The crawl space of this Southport, CT home had open vents, designed to circulate air throughout the area. We now know that this system does not work and only permits humid air and outside debris to enter the home. To seal off the home, we installed our CleanSpace Vent Covers. Made of durable plastic, they will never rot or rust, and they go right over the old, unsightly vent. The crawl space is now much drier and the energy needs of the home are greatly decreased.