We have found that when consumers purchase replacement media and UV lights from retail outlet stores many times they purchase the wrong product and replace it which can damage the product and void the warranty. Due to installation, warranty and maintenance concerns we only sell our systems and replacement parts through authorized heating and cooling contractors to protect the consumer. Only Genuine Elevated Air replacement media and replacement UV light are sold through this network of contractors to ensure that you are getting the right replacement products, protecting your warranty, preventing unwarranted damage and keeping your air cleaner and UV light running at peak efficiency.