I don't have asthma. My lungs are clear. But these last few months have yielded an onslaught of Spring sinus allergies partially due to being surrounded by farmland with more weeds than crop. By last week, I was waking up every morning wheezing,and being incapable of going back to sleep.
But I am finally starting to breathe again with the aid of Blue Air 411 purifier in the bedroom. What a difference it has made in just a week! I highly recommend getting one if you have breathing issues of any kind. I still need another one for the living room and daytime hours.