Field Controls offers 11 different UV replacement lamp sizes to fit Field Controls air purifiers. The UV lamp neutralizes an organism’s DNA and makes it unable to replicate. As indoor air circulates through the duct system, it is consistently bathed in UV light as it passes through the treatment zone. Based on the design of the central air system, each molecule of air will pass over the lamp 75-150 times a day. Independent lab tests indicate that Field Controls UVs have a significant and cumulative effect on the concentration of airborne germs in the home. In an independent test, Field Controls UV reduced the test bacteria by 90 percent with a single airflow pass at typical airflow rates. This efficiency will not be the same for all bacteria and molds since each organism requires different exposure times at the same UV output energy level. While Field Controls UV air purifiers reduce airborne germs, they can also keep A-Coils clean. A-Coils are in moist, dark places, the perfect breeding ground for mold and toxic biofilm that releases germs into the air each time the system cycles. When a UV lamp is placed near the A-Coil it keeps the coil clean, allowing the AC system to run efficiently, which saves on energy costs, reduces maintenance, and extends the life of the equipment.