This is the first product that I bought as far as uv air sanitizer but I love this one.it's so nice,stylish, and after 1hour you can tell the difference -the air is cleaner and it's easier for you to breathe.my husband has asthma and he can tell the difference too. It kills the viruses too so it's nice if somebody at the house is sick , you can use it to sanitize your house.I do recommend this product mostly if you have dogs or kids in the house.