I was a bit let down when I went out and bought a portable air purification system. I had bought the portable air purification system because I had been having both air quality issues and allergy issues in my home. The bad part was that the portable air purification system did not completely get rid of my allergies as I thought it would. It helped somewhat, but not all the way. I still had bouts of coughing and sneezing from the allergies. The air quality was a little better as well, but not completely great. I thought about taking the portable air purification system back to the store and getting a refund. But then I figured what I could do is just buy another one and see if running 2 portable air purification systems would help and do the job. I am happy to say that yes it did.That was the key. When you are trying to clean the indoor air quality of your home without a whole home air purification system which is way too expensive for me to invest in, getting 2 portable air purification systems makes it so that it will do the job that is needed. I had no more allergy problems and no more bad air quality after running 2 portable air purification systems in one room within my home. I thought about maybe buying another 2 portable air purification systems so I can have 2 rooms having the indoor air quality cleaned at the same exact time, but that would be a little overkill I think. So I will keep what I have now since it seems to work really well.