I had been going through a bad asthma period for the last year or so and taking medication (Advair … Salmeterol). The first 3 months of 2019 were particularly bad and were affecting me emotionally.
I live in an old house (1941). I was recently reading up about air ducts and the need to have them cleaned every few years. (My ducts had never been cleaned since I bought the house in 1994!)
Four weeks ago, I got my air ducts cleaned and they found some patches of mold around the downstairs air handler. They pulled a lot of dirt out of the ducts and vents and they remediated the mold. (I'm in North Texas and the cleaning techs said that most older homes here have some mold, especially if you live anywhere near a lake. The techs also said that most homes have never been duct-cleaned!)
Immediately, I noticed far less dust around the house and the vents appeared to be blowing stronger. However, the most significant result is that for the last five days, I have had very minor asthma symptoms … even drastically reducing my medication.
Will this continue? I do not know, but I sure hope so!
So … get your air ducts checked!
p.s. As an added level of protection, I just bought a UV+ozone bulb for $19 off Amazon. [UV light and ozone neutralizes mold, pollen and other microbes, btw. You just can't be around the bulb while it is lit]. I have been sanitizing each room of my house, in turn. I merely run the lamp for about 30 minutes with each door closed, then I air out the room to dissipate the ozone smell. (I will continue to zap the downstairs air handler closet every few weeks … just to make sure!)