allergybuyersclub.com has good reviews on a wide range of air purifiers. I don't have any financial connections to them, just have been a happy customer for many years.
Chronic Lyme, Bart., Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut dysmotility & non-specific inflammation, Lupus, Osteoporosis, etc.; G-Tube; TPN-dependent
Meds: Zofran, Domperidone, Hydrocortisone, Essential Oils, Homeopathy, Herbs, etc.