When you ignore the importance of UV lights & do not install them along with HVAC systems, you can face issue like: The moist parts inside the system could become an ideal space for mold & mildew to grow. And as the system works, these particles enter your place. As a result, indoor air quality becomes a matter of concern. If you have made up your mind to get UV lamps for the HVAC systems at your place, make sure to visit Light Spectrum Enterprises, Inc.