I called this company because I was having problems with allergies. They came out and did some air testing. Through this we found that my home had elevated levels of mold and yeast. It was then recommended that I install a Ultra Violet light system to help purify the air in my home. This was a little costly but boy did it make a complete difference in the air in my home!!! I can breathe now! I would recommend this company to anyone they were very professional, and helpful. I even had a few more questions after all was said and done and they took the time to address my questions even after everything was done and over with.