Last year I added UV-C bulbs to my air conditioner. One bulb is sited before my air filter in addition to the minute bulb is sited after my coils in space leading to the opening to the entire duct proposal for the house. The bulbs utilize a special ultraviolet light frequency that is so bright that it kills essentially anything that it comes in contact with at close enough proximity. They’re so bright you’d go blind if you stared at one straight for an hour. But for someone prefer myself with regular seasonal pollen irritations in addition to awful enough asthma as it is, they’re amazing. I use the highest allergen rated air filter that my hardware store carries in addition to I am thorough in addition to frequent with my Heating in addition to A/C maintenance in addition to repair appointments. I even have my air duct professionally cleaned every 2 years. Despite all of these attempts at better indoor air quality, I was still noticing problems with shortness of breath, headaches, in addition to occasional wheezing in addition to sinus congestion. My Heating in addition to A/C specialist suggested the UV-C bulbs at that point in addition to I promptly busy an replacement appointment for the following week. The first month with the bulbs was prefer a dream, no headaches of any kind in addition to I felt prefer I could breathe easier with little to no nasal or sinus congestion. They have been really the best investment in my proposal yet, but after 8 months of use I started to notice a drop in performance. I had occasional headaches again in addition to my lungs weren’t feeling as wonderful as usual. I assumed that the bulbs would burn out completely when they had expelled all of the ozone gas inside, although I was wrong. You could have those bulbs in their creating light for years after they have been used up completely for their antimicrobial properties. My Heating in addition to A/C tech put in new bulbs Last year in addition to I have been living better again as a result.