New uvc bulb enjoy breathable air with the uvc sizing to your system. Kills all contaminants causing colds flu sinus infections allergies Asthma other serious. Install the right size.. in your air duct air handler to make it completely safe. The safest place use UV C lights is where you Cannot see them if you look@the light you could go blind. I guarantee light for 2 years are installs. The hard part is keeping the bulbs in stock life in outpatient centers hotel rooms lobbies conference rooms spas wellness centers boutiques food and drink processing shops business offices laundry mats banks brokerage firms medical offices restaurants dental offices bus in private jets school classrooms and cafeterias hospital nursing homes And Cruise ships no more No more Spraying chemicals in your house. It is proven studies by the CDC prove the effectiveness of using UV C to stop the spread of infectious diseases Just recently UVC she lights a been adapted into surgical rooms to blast the entire Room with light and purify within minutes between patients they in sanitize a Room in 30 minutes. These are Germicidal light. You should change your UV C bulb once a year or give you a 2 year warranty You'll save on your Electric City bill Because when the bulb is installed it will clean the a frame of your air handler your air handler work more efficiently said doesn't have any more mold in it And you can rest assured to be no cova D in your house on the Unless you bring it in. I live in a very moldy house for the last 2 years the mold test taught us to move out of the house immediately The only way we can stay in the house I installed the UV C Bulb well in the right places. If you have questions send me an email {contact info free coil cleanings with install