This is the newest model and has been used right at a year! Filters are still doing well. Retail, this model runs from 1,600 to 2,000 new. 
Info about this model straight from the Healthway webpage: (also have added a photo of the product detail sheet)
"The Deluxe is a portable, easy to maintain, efficient air purification unit. Each and every unit that leaves our facilities is independently tested to meet and exceed the HEPA industry standard (99.97% at .3 micron). Our Deluxe model comes with a heavy-duty commercial-grade gas and odor filter which eliminates most gases and the patented DFS technology can remove harmful viruses, mold, and bacteria, leaving nothing but fresh, pure, healthy air in your space. Offering coverage up to 1,200 square ft. with variable airflow up to 200 CFM, this model is perfect for use in schools, offices, homes, and other settings. Class 2 medical device.