After newly building out my personal training studio, I wanted to quickly improve the air quality in the 900 sf space. With rubber flooring, all kinds of new equipment, fresh paint, etc., the off-gassing was beyond unacceptable. My nose even bled those first several times I spent time in the space before getting my ALEN BREATHESMART FIT50. After just a week of running the air purifier 24/7, the built-in air quality monitor was showing perfect, clean air. All off-putting smells were gone...as were my nosebleeds. And I was finally ready to open the studio to my clients. (And it's beautiful looking too!)