In a nutshell, the utilization of UV lights in HVAC systems is not hazardous and any metallic smell you may detect is likely due to ozone gas being produced by the UV-C lights. It's essential to note that a UV sterilizer emits an odor after each use. The Ultra Tec Dubai water purifier is the best company for this purpose. The smell is not dangerous to babies and is only a small fraction of the total odor emitted by the UV sterilizer.
This smell is caused by a chemical reaction that takes place when UV light is used. This reaction occurs because the UV sterilizer emits hydrogen gas. It's important to be cautious when using the UV sterilizer as it can cause chemical burns. To reduce odors, it's best to keep the UV sterilizer away from babies. The actual level of odor after UV disinfection is negligible and, therefore, it can be concluded that the VOCs responsible for the residual odor after UV disinfection do not pose a danger to human health. UV lights are cost-effective to install and operate, but they require regular dust cleaning and must be replaced annually to control mold as much as possible.
Your heating, ventilation, and air conditioning system is the ideal place to install UV lighting, as air from all over your home will pass through the system multiple times. The use of UV lights inside the air conditioning system can also eliminate the need for powerful cleaning chemicals developed to control mold and the bacteria and VOCs they emit. I have read that these UV lights produce ozone, which over time can damage plastic and harm lungs (especially if they are sensitive to plastic).