The duct-mounted UV-Aire lamp works with any forced-air system to purify the air in an entire home or office up to 4,000 square feet in size, the company says. Each unit comes standard with a duct board mounting kit and patent-pending angle brackets. Two new models, UV-12E and UV-18E, include aluminum NEMA 3 enclosures for external, outdoor installation on oil/gas package units.