I originally bought this Mini tower HEPA air filter when I was expecting my first child. I wanted her room and the main living space in the house to have 'clean' air. I ended up buying two one for each of those spaces. We have used them both for 5 years. My daughter still has hers in her room and the second one has been moved into our new babies room. They have worked well and I feel they have helped keep the air cleaner and reduced the diaper smell. In addition, to purifying the air, we have the bonus of having the sound it makes act as a sound machine. Both of my children need the sounds of white noise to sleep peacefully. This purifier has a soft hum that it makes and the noise soothes my kids to sleep. Not sure if this is what was meant for it, but it works well for me. I would recommend this for sure.