Advantage Manufacturing has been proud to serve the Chicagoland area, and all of America, since the year 2000. We are specialists in the production of ventilating systems for the residential market, offering a range of unique high-quality products.OUR PRODUCTS:access door for crawl spaceWith innovative and attractive energy-efficient construction, these durable, and maintenance-free doors, are available in two popular colors, white and clay.WINDOW-STYLE CRAWL SPACE POWER VENTSWe are the only producer of this one-of-a-kind vent. Maintenance free, it automatically turns on when the window is opened, replacing stagnant air with fresh outside air.CRAWL SPACE VENTSWith window-style, maintenance-free construction, they allow fresh air during the warmer months, while sealing out the elements during cold, winter months.