Titanium dioxide filter boosts UV bulb which helps remove airborne germs, bacieria and other microorganisms that are exposed to the short UV wavelengths. Traps 99% of germs that pass through it under UV light. Rinsable pre-filter captures large pieces while HEPA media filter removes dust and pollens down to 0.3 microns. Ionizer emits negative ions into the air that cling to and weigh down airborne particles and germs making them easy to trap. lntellisense'" control system senses air quality and automatically adjusts fan speed to the optimal setting for current dust levels. Charcoal filter absorbs airborne odors. Reduces contaminants in the air by reducing smoke, dust and pollen particles. helping to make the air cleaner and better to breathe. Meets and certified AHAM RoHS Compliant. Black. 7½w x 11'1/sd x 251/ioh. Manufacturer's two-year limited warranty.