Well I’ve had my Sans for a couple months and I really feel the difference. I’m no longer — sneezing every minute. I no longer have a hoarse voice -/ from breathing in my house!! My allergies were really off the chart!! But now-I can go all over my house and my two big symptoms are just about gone. I’m so happy that I can sing again!! I can talk on the phone and my family won’t say — oh lady what’s with your voice and you sound sick!! I really , really can feel the difference in my clean air now. I changed my AC unit and got the vents cleaned and got new filters put up. It’s like I’m in a hospital— the way my home smells it’s fresh , not stale. It’s amazing how this wonderful - whole house filter works. One of the best thing that I did for myself and my family. My husband read about Sans , then I read all about Sans. Boom - I ordered a unit and the rest is history!! ✅😊 I’m truly grateful and amazed. Thank you creators.. this was made for people like me-Louise Galarza. A fan of Sans — for life.