Immunity Machine Filter

I purchased an Austin Air immunity machine a few months ago. I put it in my bedroom open to the north part of my home. I went the whole winter without so much as a cough, cold or anything worse. Two weeks ago I purchased a immunity filter and prefilter for my other Austin Air machine in the south of my house. My son came to change my furnace filter and found it as clean as new. I feel healthy and completely satisfied with Austin Air products.

system works great

Best for more than 20 years.