https://www.quora.com/Air-duct-cleaning-Could-it-potentially-reduce-your-air-quality-instead-of-improving-it
Air duct cleaning: Could it potentially reduce your air quality, instead ...
Aug 20, 2019 ... Will an air cleaner improve or decrease one's heath? On one hand, you breathe in less polluted air. On the other hand, your body gets less used ...