Elaine recommended the fresh air system for us because our boys have asthma and allergies. Since installing the unit, my children have been doing so much better. They rarely ever use their inhalers and they are off all seasonal medications. I also don’t believe in flu shots and I am happy to say that my children have not gotten the flu even through the swine flu epidemic. I really believe that they are healthier because of the fresh air unit and would love to see all schools, day care units and child activity centers purchase the units.