Noticeable reduction of smell from biological sources
Works great in smaller spaces to help contain smells from a biological source (e.g. a litter box). Given the reviews here, I was expecting a 120 db freight train roaring through the cat room, but it really isn’t noisy at all. Does it make noise? Yes, things with moving parts tend to. Is it really noticeable? No, it is not.<br /><br />It’s also important to understand the theory of operations of different types of air purification systems: UV isn’t a mechanism to remove smells from non-bacterial sources or removing particulate from the air, for that you need either a traditional HEPA, electrostatic, or even a catalyst (PCO) type filtration system. What UV does is interfere with the DNA/RNA of pathogens causing them to not to be able to replicate. No/less bacteria = smell reduction.<br /><br />The usual Amazon review armchair Sc.Ds will go on about ozone and UV nanometers and whatnot to flex their interweb muscles based on some random Wikipedia article of why this won’t work and why you need ozone, but the reality is that once you’re in the UV part of the electromagnet spectrum, you’re going to have some sort of impact on DNA regardless of wavelength. Do some nanometer lengths have greater impact than others? Sure, but it doesn’t mean  that it’s ineffective, it’s just slower. UV isn’t something you want to play around with, which is why we all wear some sort of sunscreen to prevent skin cancer.<br /><br />Speaking of cancer, that’s exactly why you DO NOT want ozone generation in your house, and I wish people would stop going on about needing it in these reviews. Ground level ozone is damaging to the mucus membranes in your lungs, and more so to the young, elderly, pets, and people with breathing conditions such as asthma, COPD, etc. Don’t take my word (another random Amazon reviewer) on this, think critically and do your own research here on the mechanisms of the how and why by googling the EPA’s report on this topic.<br /><br />Anyway, to condense: this seems to work in a small space where I have a litter box, and I’m pleased with the purchase.
Rating: 5 stars