Levoit Core 300S vs Winix 5500-2: App or Airflow?

The Levoit Core 300S is the better buy for a bedroom or office under about 220 sq ft; the Winix 5500-2 is the better buy for a room between there and about 360 sq ft. They cost almost exactly the same per unit of airflow, roughly 70 cents per CFM, so the room size and whether you want an app decide it, not value.

The short answer

Choose the Core 300S if the room is 220 sq ft or less, you want app scheduling or voice control, the purifier has to sit on a nightstand, or you would rather own a purifier with no ionizer at all.

Choose the Winix 5500-2 if the room is 220 to 360 sq ft, you are happy with buttons and no app, and you like a filter set where only the HEPA sheet is a yearly expense.

On paper	Core 300S	Winix 5500-2
Smoke / dust / pollen CADR	141 CFM smoke	232 / 243 / 246 CFM
Room size at 4.8 air changes/hr	~219 sq ft	~360 sq ft
Rated noise	24 to 50 dB	27.8 to 59 dB
Rated maximum draw	24 W	70 W
Ionizer	None	PlasmaWave, switchable
Filter	Core 300 Series cylinder, $29.99 every 6–8 months	Filter H (116130): True HEPA yearly + washable carbon, about $60 at Amazon ($84.99 list)
App	VeSync, with schedules	None
Typical price	$90–$110	$150–$170

The brand-level view is in Levoit vs Winix; this page sticks to these two models and the numbers that separate them.

Price per CFM is a tie

At about $100 for 141 CFM, the 300S costs about $0.71 per CFM of smoke CADR. At about $160 for 232 CFM, the 5500-2 is about $0.69. Neither one is the bargain the other is not; you pay for the airflow your room needs and get roughly the same deal either way.

That makes the room the deciding factor. Here is each unit at full speed under 8 ft ceilings:

Room	Core 300S	Winix 5500-2
10 x 12 office (120 sq ft)	8.8 changes/hr	14.5 changes/hr
12 x 15 bedroom (180 sq ft)	5.9	9.7
13 x 17 bedroom (221 sq ft)	4.8, at its limit	7.9
15 x 20 den (300 sq ft)	3.5, short	5.8
16 x 23 living room (368 sq ft)	2.9, short	4.7, just short

The Levoit runs out right around 220 sq ft and the Winix right around 360. A 9 ft ceiling pulls both limits down by about a ninth, to roughly 195 and 320 sq ft. The room size calculator does the volume math for odd layouts.

Noise in the room you will actually use

Spec-sheet noise ranges hide the real comparison. In a 12 x 15 ft bedroom, 4.8 changes an hour needs about 115 CFM. That is 82% of the 300S's maximum, so on a dusty night it will sit on its upper speeds. The same airflow is half the 5500-2's capacity, which leaves it in the middle of its range.

So the Winix can be the calmer machine in a mid-size bedroom even though its rated floor (27.8 dB) is higher than the Levoit's (24 dB) and its top speed (59 dB) is much louder. In a small bedroom under about 150 sq ft, the 300S needs only modest speeds and the advantage swings back to it.

Three-year cost, worked out

Assumptions: mid-range purchase prices; the first filter set comes in the box; the Levoit cylinder is replaced about every 7 months (five replacements in 36 months) at Levoit's $29.99 list; the Winix HEPA is replaced yearly with a full Filter H set at about $60 (Winix lists it at $84.99; Amazon had it at $61.30 on 2026-10-01), and its carbon filter is washed rather than replaced.

Over 36 months	Core 300S	Winix 5500-2
Purchase	~$100	~$160
Filters	5 x $29.99 = ~$150	2 x ~$60 = ~$120
Total before power	~$250	~$280
Power ceiling (max draw, 24/7, $0.17/kWh)	~$107	~$313

Before electricity the Levoit finishes about $30 ahead. The power row is a worst case because both makers publish only maximum draw, and nobody runs a bedroom purifier flat out all year; still, the Winix's 70 W rating means its electricity bill will be the bigger one at any given speed. If your Levoit filter lasts closer to a year in a clean bedroom, its three-year total drops to about $160, making it the clear budget winner.

The genuine Winix 5500-2 Filter Set page has fit details, including the one other Winix model it fits.

The differences buyers miss

PlasmaWave is optional, but it is there. The 5500-2's ionizer can be switched off, and the unit is CARB-certified as ozone-safe. The Core 300S simply has no ion stage. If a household member has asthma or you would rather not think about it, the ionizer and ozone safety explainer covers why many reviewers leave PlasmaWave off.

Washing the carbon is a chore you have to remember. The Winix's low running cost depends on actually rinsing the AOC carbon filter on schedule; a carbon layer that never gets washed loses its grip on odors like any other. The Levoit's carbon is bonded into a disposable cylinder, so there is nothing to maintain between swaps.

The 5500-2 is the older model. Winix's successor, the Winix 5510, adds an app and a little more airflow (253 CFM). Because it uses Filter Q rather than Filter H, a stash of 5500-2 filters will not carry forward.

Form factor. The 300S is a 6 lb cylinder small enough for a nightstand or desk. The 5500-2 is a floor-standing box, so plan a spot for it on the floor with space around the intake.

Which one to buy

Measure first. A room of 220 sq ft or less gets the Core 300S: cheaper, quieter at its floor, app-connected and ionizer-free. A room from 220 to 360 sq ft gets the Winix 5500-2, as long as you can live without an app and will rinse the carbon filter.

If you want the Winix's coverage and the Levoit's app with no ionizer, the Levoit Core 400S-P (231 CFM, about $160 to $220) is the middle ground. And if the space is bigger than 360 sq ft, both are too small; the Core 300S vs Core 600S comparison shows where the larger Levoit Core 600S takes over.