If your idea of the best air purifier is one that\u2019s the best whole house air purifier, the Germ Guardian AC4150BLCA isn\u2019t what we\u2019d choose. No, it\u2019s better at cleaning the air within a small room, like a living room or child\u2019s bedroom. Despite its small stature, it has surprisingly good performance and excellent value.\r\n\r\nWhy We Like It - Germ Guardian AC4150BLCA\r\nFor cleaning the air of living rooms or a child\u2019s bedroom, the Germ Guardian AC4150BLCA is more than up for the task, handling 75 sq ft like a pro, and even projecting pictures for little children to enjoy.\r\n\r\nPower & Speed\r\nYou\u2019ll have three speeds available to flip between: low, medium, and high. Its performance and power are directly tied to which speed you use, up to 45 watts, but depending on the time of day you might want to lower it. In fact, on High, it can reach decibels of 60, so perhaps set it to high when you initially get it, then lower it to Medium or Low for regular use.\r\nEfficiency\r\nIf you stick the Germ Guardian into a big room, you\u2019re going to be sorely disappointed. The room shouldn\u2019t be any bigger than 75 to maybe 80 sq feet, or else you\u2019ll see a drop in its performance. Anything bigger than that and you might as well go with the Coway Airmega 400.\r\nVersatility\r\nSo you\u2019ve placed it in a smaller sized room. What\u2019s it going to do? For starters, its True HEPA filter UVC sanitizer and charcoal filter combo are tackling most tiny particles, such as: pet dander (and hair), pollen, dust, smoke residue and odor, UV sanitizer, dust mite allergens, and chemical vapors. If it\u2019s as small as 0.3 microns, it\u2019ll usually get captured, leaving behind fresher, more safer air to breathe. The Alen BreatheSmart Classic Large Room Air Purifier has models that split those functions apart.\r\nDurability\r\nAt first glance, it may look like a speaker\u2014but don\u2019t be fooled. The table top tower you\u2019re looking at is still an air purifier. Its non-threatening design and finish show a fairly good, yet premium look and durability.\r\nValue\r\nTo get an air purifier that performs that well, at just under $70 is a godsend, and cheaper than the Oransi Max HEPA Air Purifier; however, you also have to consider the extra costs. You\u2019ll need to occasionally pick up replacement filters. And any repairs should be made with genuine Guardian Technologies replacement parts for utmost efficiency. Since it has gentle white noise and Twinkle Moon Stars Sleepy Safari projector, it\u2019s perfect in a kid\u2019s room.\r\nGerm Guardian AC4150BLCA Wrap Up\r\nGerm Guardian AC4150BLCA Night Light Projector Air Purifiers are great workhorses in smaller rooms\u2014especially for a kid\u2019s room, but don\u2019t let that stop you from using it in your living room (space permitted). Sure, its highest speed setting is a bit noisy, but leaving it at Medium will do just fine. After all, value like this is hard to come by.