As a mother of ten children first, THEN a distributor of nature-duplicating air purifiers, I wouldn’t be without such air purification in my home. The bacteria, odor, smoke, chemical outgasing from woodwork/upholstery/carpeting, etc. have made my purchase in November of 2002 of a whole house air purifier; very worthwhile. Some people think that only a HEPA air filtering unit is sufficient. But air is dumb…it won’t all go through that unit unless it’s pushed or pulled. So the air in the next room is just not going to get through the air filtering unit. With my air purifier, it electronically duplicates indoors how God has purified the air outdoors since time began the same ionization, hydroxil, ozone purifiers and it goes out in all directions, flows with the natural air flow in the house via the ductwork system, to sanitize all surfaces with the 03 it produces, remove smoke & odors even pet issues and urine and so much more. 877.835.9523 will answer your questions any time.