T500 Tower Air Purifier

I have 6 Alens. 2 x BreatheSmart 75i, 2 x BreatheSmart, a T500, and a Paralda. I like them. They are quiet, the sensors (on the 4 bigger ones) seem to be accurate and ramp up cfm when air quality calls for it. I live in the lightning capital of the world... God's Lightning Rod, FL. I had 2 older ones that got hit and the LEDs went out. It still worked fine, it was just the little LED bulbs that didnt work. They sent me 2 new units with no hassle. The filters are not cheap, but I am happy with how long they last and how they perform. I'd 1000% buy from them again.

I have two Fit50 units - one in the main living space in my house between the living room and kitchen, the other in our bedroom because it’s a large room and our dogs sleep in there with us - and the other four are T500’s, three of which are in my kids bedrooms and the fourth is in the upstairs family room. We live in southern Texas where everyone is allergic to something no matter what time of year, and spring is referred to as “the pollening”. I’ve had generally well-controlled asthma since I was a kid, and allergy tests in 2015 concluded that dog dander was an issue for me. I bought mine when the company wasn’t a name people recognized and they had some great deals on multiple units. Because they’re so reliable, I’d feel entirely comfortable purchasing a refurbished unit, and at the price difference it’s the only way I’d go if I needed another one. The only thing I can’t speak to is their customer service - which is ironically the best reason to invest in them - because I’ve never once had to contact them. I’ve also got four different friends/neighbors nearby who also have pets and allergies and bought them after being in my house, and they all still religiously use theirs. If that’s not enough of a pitch, two of my kids are teen boys and one has had a guinea pig for five years. Between the sour onion funk and guinea pig stank, the only time their rooms smell is when they dare to turn their units off. These things are freaking magical.

I have an Alen BreatheSmart in each big room and an Alen T500 in the smaller rooms. They are basically silent and work amazingly. Plus you can get set up for filter deliveries every 6 months or so.

Not a Dyson. Seriously. Alen, Coway or winix.

Dyson in general is not known for high quality especially for the price they charge. Also their customer service is shit. The other 3 I listed are much better options. You’ll want as much carbon in the filter as possible. Alen VOC for example.

Here In US we don't have Phillips so much, so I've never had one, although they do some popular/common in posting in here and are probably OK.  I have multiple Levoits though and love them.  As for being quiet in sleep mode you might want to look at th Levoit unit sprout, that is more for a nightstand, and very quiet.  However it also has a weaker motor + smaller filter so it doesn't move as much air as a Core 300.  So I am not sure what setting sleep mode is (1 I guess ?) but then ofc your purifier isn't moving as much air so you get less CADR in sleep mode.  So one thing. You can do is get 2 units and run them both on low/sleep mode, for more CADR.   I really don't know what "quiet" means to you as that is subjective, but my levoits are defintely pretty quiet on low.  But again...you get less CADR like that so run them on high when you are awake at least imo.   Levoits are great and the Core 300 is one of the best units available for it's size + price point.   Levoits also do have some carbon in their filters, and some pellets, however it's not as much as bigger/better units.  So they can help, but no purifiers under 200 bucks or so will dramatically change smoke or odors a lot.  It can help a little though.  Good units for smoke + odors are Austin Air which is 750 bucks, Rabbit Air which are also very quiet (but lowish CADR don't move much air, same with the Austin Air, as slower air movement is better for the carbon + pellets to absorb the odors.) as well an Alen is a good brand that is a mix of decent CADR but with good filters for smoke + odors (if you get their best ones) and very quiet and energy efficient.  And they come with a lifetime warranty if you remain in the filter replacement program. However their smallest, the 25i is probably around 200-250 bucks ?    As you pay a little more for the benefit of a lifetime warranty.   So it really depends how important quiet is and the odor stuff.   Levoit makes great all-around units that can cover the basics for most people and do it well.  I've had two Core 300's running near continuously...for 5+6 years now...so incredible durability + value for the you lay.  (And performance.). But Phillips seems like an OK brand too (as far a I know) so if you can get a good deal on that, probably fine too.  Ofc as a Levoit fan I would get the Levoit.  Or if you can save up a little more, get an Alen 25i as that is probably quieter than both of those units, and better for smoke/odors, if you get their best filter.  

I don't have the Vitals but they are great units too.  So the Vital S will be slightly weaker than the 300, but very close in power, and a little quieter too.  And with the smart functions.   So In this video they compared a bunch of purifiers, and the Vital 200 (bigger than the 100) was still quieter than the Core 300.  So the Vital 100 is apparently 23-52 decibels.  And 143 CFM on high.  The Core 300 goes to 64 decibels or so, and 155 CFM.   So you might be happy trade a little CFM for a bit more quiet.  It seems like a logical choice for you I'd say.  Although if you can afford a Vital 200 that will be better for bigger rooms if you will be moving it around.  But really - you will want at least 2 units anyway as it's best to have 1 in each room, or at least in main area you spend time in + bedroom.  So a Vital 200s great for a living room, and the 100s great for a bedroom.   So get whichever you can afford now...and then get the other later.  Slowly add units...until you have excellent for coverage.  (Which might be 2-3 units depending on your space, if carpets, your allergies etc.). You will likely notice a big difference, even with 1 unit.   So you will prob want to buy more...once you see the difference.  (As I did.)   But a a Vital 100S a great start, esp for a bedroom.  In this video at around 20:10 or 20:54 he shows the chart with the results. (He didn't happen to test the vital 100 here, but the 300+200s + their smaller one and the Levoits performed really well, and best at thier size.)  https://www.youtube.com/watch?v=sQGfO4hNb60