When it comes to improving your home’s indoor air quality, it’s important to understand how air purifiers operate and how they help people improve their quality of life. Air purifiers work non-stop to ensure we breathe in fresh, clean air 24/7. They come in different forms, such as negative ion emitters, heaters or UV lamps, and they all share the common goal of reducing odors and pollutants in the air. Here your leading HVAC air conditioner repair expert lists three things you need to know before buying an air purifier.