CLEAN AIR ? The NuWave OxyPure clears the air in your home of lead, dust, pollen, smoke, pet dander, allergens, gases & volatile organic compounds. BETTER SLEEP ? The NuWave OxyPure helps you sleep better by eliminating airborne allergens and pollutants that can irritate your sinuses, nasal passages and lungs; while the whisper-quiet Sleep Mode helps to promote ideal sleeping conditions. MORE ECONOMICAL ? The NuWave OxyPure saves you money with energy-efficient smart-touch controls and auto-monitoring capabilities as well as extra-long-lasting reusable filters. ADVANCED FILTRATION ? The NuWave OxyPure's 4-Filter System includes a stainless-steel Pre-Filter that is reusable for up to 20 years, a Bio-Guard Filter that will last up to 20 years, an Ozone Emission Removal Filter that also lasts up to 20 years, and a combination HEPA/Activated Carbon Filter.