The BioGS™ HEPA filtration system is a breakthrough technology engineered and developed by Mitsubishi Heavy Industries. Ranked highest in areas of quality and efficiency, Rabbit Air is a new generation air purifier that eliminates all of the weaknesses of a conventional HEPA air purifier. The BioGS™ SPA-421A air purifier offers a HEPA Filter made of the most advanced Bio-Engineer fiber material which not only traps but also destroys the allergens such as pet epithelia, dust mite and pollen which typically accumulate on the filters. This model also comes with a washable charcoal based activated carbon deodorization filter for the removal of odors, harmful gases, and chemicals. This air purifier covers up to 600 square feet and removes a wide variety of allergens and contaminants, including dust, pollens, dander, odors, chemical vapors and more. How It Works. Key Features:. BioGS™ HEPA Filtration - Main filter made of the most advanced Bio-Engineered Fiber Material which traps and destroys allergens and contaminants. (No secondary pollution through the HEPA filter like the conventional HEPA Air Cleaner.). Flu Prevention Capability - The Osaka Public Health Research Center in Japan found that the BioGS™ HEPA filter coated with anti-influenza virus agent effectively lowered the viral transmission of H3N2 influenza virus. Traps airborne allergens and contaminants down to 0.3 microns in size, 99.97% of the time. Nano-Silver Sterilization - Features a Nano-Silver pre-filter to help kill airborne bacteria, mold and viruses. Energy Efficient - Inexpensive to operate. (Only consumes 33 Watts at high speed & 7 Watts at silent speed.). Cutting Edge Motor Technology with Inverter Control - Unit can operate at 5 different speeds. Completely Silent at low speed. Covers up to 600 square feet based on 2 air changes per hour. Generates negative-ions. Activated Carbon Deodorization - Charcoal based Honeycomb Activated Carbon filter eliminates many common household odors, Volatile Organic compounds and household chemical smells. Zero Ozone Emissions. Superior Quality - Product engineered by Mitsubishi Heavy Industries and includes a 5 year warranty. Long Life HEPA Filter, Washable Pre-filter & Deodorization filter - HEPA filter lasts up to 3 years based on 12 hours daily operation. Pre-filter and Charcoal based Honeycomb Activated Carbon filter are washable. Click on the picture to enlarge. Remote Control. Top View. Side View. Back View. BioGS™ Hepa Filter. Charcoal Filter. Washable Nano-Silver Pre-Filter. Main Unit Display. BioGS™ Filter Fiber Comparison. Standard HEPA Filter vs BioGS™ HEPA Filter. What's in the Manufacturer's Box? RabbitAir® SPA-421A Air Purifier. BioGS™ HEPA filter with Flu Prevention. Washable Nano-Silver Pre-filter. Washable Charcoal based Honeycomb Activated Carbon filter. Remote Control. 3V Lithium Coin Battery. User's Guide. Starter Guide for Filter Installation. Warranty Registration Card (Click here to view RabbitAir BioGS™ Warranty - PDF). Related Links. Read an article about the top polluted U.S. cities with the worst air. New video explains why Rabbit Air BioGS air purifiers are superior. Click here to view video. Air Purifier Comparisons