UV light installation

What are these blue lights that kill germs, we see them in hospitals, salons etc. Ultraviolet (UV) light have been used for years to kill germs and steriize equipment. Specialized equipment now allows the installation of UV lights in your HVAC system close to the air handler, we make sure that pathogens and microorganisms are destroyed before they can circulate into your indoor air. UV lights also kill mould, fungi, bacteria, and allergens that can build up inside your furnace and in your air ducts. .