I cannot tell that the ECO System has made any changes in my home environment or health. Have my same sinus problem and house dust. Still cough when I lay down in bed at night. They said maybe they need to increase the probiotic concentration setting on the machine connected to the A. C. Unit. But they never came out to do so. Then you would need more than one container a year. They had me pay for 5 containers for 5 years. Total cost of all was $5,000.00. Think maybe I was over sold on the set-up. I hate to use the word scammed.