Levoit Core Mini-P 255 Sq Ft 3-Stage Filtration Desktop Air Purifier with Aromatherapy for Small Bedrooms and Nurseries, Gray

96/100 score from me! I like to get technical and practical. 12V 1A with a 5.5x2.1 barrel jack comes with it, so it's super easy to power on the go. A USB-C to Barrel jack 12V inline trigger cord works great in the car for constant 12V(since it's finicky about voltage/has a 2.1mm not 2.5mm inner positive contact). Fan Power / Wattage: 12.0v x 0.52A = 6w on highest speed (2-month-old filter running high 24/7) 12.0v x 0.21A = 2.5w on speed 2 of 3 11.9v x 0.09A = 1.1 Watts All tested on the factory power block with 3 different DC wattmeters. Filters 1-3 months old, both the older model and the newer black version, and this newer off-white/white two-tone. /-2% Filter design is just a tube, no bottom like its 300 series. Filer Dimensions: 125mm tall x 147mm wide with a 96mm hole (a strict 94mm minimum hole that would work, and 110mm hole would be too big to even seat to the filter head unit FYI). Weight distribution: the motor is right near the center on the filter. Size is like a slightly large football or half-gallon Mason Jar (actually, the weight and size is closer to the glass 64oz Mason jar if that helps). Air holes on the sides make it easy to mount it (improperly), and the base CAN stay stationary permanently with no restrictions or issues in case you want to mount it sideways under a desk or something. The cord plugs in the "top" if laid on its side looking at the display FYI I do recommend a few stick-on cable guides to give the plug a good S bend and tape the plug if it's going to be bumped a lot. Each time it loses power for a fraction of a second, you have to pause, tap fan speed from 1-3 times to reset it, but they all do that, and at least it's a 90-degree elbow barrel plug on the mini-P series, so it's almost a non-issue. Air Purification: PM1 = 0-2 ug/m3 PPM PM2.5 and PM10 = 0-4 Sensors 6ft away, and I use a open air 3d printer (PETG even) TVOC and HVOH is under 0.015 ug/m3 within an hour of an 8-hour print in my living room! Only a Levoit Core Mini-P so for apartments 1 unit will do. Only thing I wish they did was USB PD input, a battery or capacitor. A simple switched model so it comes back on when power is restored, but that would sacrifice the fact you can bump the recessed touch "buttons" without changing anything, and even with your hand, it just turns the back light on and shows the current setting without altering speed or power toggle upon first touch. Which is nice and probably goes unnoticed by most people. I've yet to find a better one, especially with a HEPA, and I think they removed that title because the (snug) plastic-to-plastic fitment on the bottom and 4mm x 10mm foam tape at the top is technically not perfectly airtight, but even as is, 99.8% of the flow goes through the HEPA, and dust doesn't even collect at that contact area. So again, not a flaw, just a technicality that it's not true HEPA without a rubber seal. INCREDIBLE! Out of 15 HEPA models/brands, the Core Mini-P is my go-to for sure,