Patented self-cleaning design ensures ongoing peak performance|Needlepoint ionization actively treats air in the living space|For duct systems up to 6 tons (2400 CFM)|No maintenance for the life of the NuShield|Easily installs in any ducted HVAC system|Flexible design with no replacement parts|Reduces certain bacteria and viruses|Reduces odors, smoke and other airborne particles|Keeps coil cleaner longer|Integral alarm contact for remote monitoring