I was told the EZ Breathe would replace the air in the house up to five times a day and also significantly reduce humidity in the house, and especially the basement. It does neither. I had OSW do my basement and install the EZ Breathe. In the summer the humidity in the basement is very high. I have a 70 pint dehumidifier running 24/7 and this makes it just tolerable. As for recycling the air in the house I tried a little experiment. I lit a stick of incense in the living room on the first floor and before I could smell it I went to the basement to do some work. I stayed there for almost three hours and DID NOT smell the incense in the basement. The stick burned completely up. So much for that promise.