Ceiling-mounted air purifiers clear entire shop areas of airborne pollution at efficiencies up to 99 percent without exhausting. High-efficiency, three-stage filtration captures sanding dust, over-spray, welding smoke, and torch and plasma fumes. A large, color-coded gauge constantly monitors the filtration process and is readable from ground level. Call (800) 280-4546 or visit www.usbodyproducts.com.