For a small bedroom where quiet matters, get the LEVOIT Core 300-P; for a medium living room where you want the fan to adjust itself, get the Coway Airmega Mighty AP-1512HH. The LEVOIT is a compact cylinder rated for 222 sq ft at 4.8 air changes per hour with a 24 dB sleep mode and AHAM-verified CADR figures of 143 (smoke), 153 (dust) and 167 (pollen) CFM. The Coway is a larger box unit rated for 361 sq ft at 4.8 air changes per hour with a particle sensor, auto and eco modes, and CADR figures of 233 (smoke), 246 (dust) and 240 (pollen). On 09/12/2026 both Amazon US listings showed a live buy box shipping from Amazon.com and sold by Amazon.com with no visible price in the observed page, so confirm the current price before deciding.
Choose by your situation
| Situation | Model to consider | Main tradeoff |
|---|---|---|
| Small bedroom or office around 200 sq ft, light sleeper, want the smallest footprint and lowest sleep-mode noise | LEVOIT Core 300-P | Less air delivery than the Coway (143 vs 233 smoke CADR); no air-quality sensor or auto mode; manual fan and timer control. |
| Medium living room or open bedroom around 300–360 sq ft, cooking odors or pets, want auto fan adjustment and a washable pre-filter | Coway Mighty AP-1512HH | Bigger and heavier (12.3 lb vs 7.9 lb); higher rated power (77 W vs 56 W); deodorization filter replacement every 6 months. |
Room size and air delivery, side by side
| Criterion | LEVOIT Core 300-P | Coway Mighty AP-1512HH |
|---|---|---|
| Rated room size at 4.8 air changes/hr | 222 sq ft (1,066 sq ft at 1 air change/hr) | 361 sq ft (874 at 2/hr; 1,748 at 1/hr) |
| CADR, smoke / dust / pollen (CFM) | 143 / 153 / 167, AHAM Verifide | 233 / 246 / 240 |
| Filtration stages | 3-stage: pre-filter, HEPA-grade main filter, activated carbon; alternate Pet Allergy, Smoke Remover and Toxin Absorber filters sold separately | 4-stage: washable pre-filter, deodorization filter, HEPA filter, bipolar device |
| Noise range | 24–54.5 dB; 24 dB sleep mode | 24–53 dB(A) |
| Rated power | 56 W | 77 W |
| Size and weight | 8.7 x 8.7 x 14.2 in; 7.9 lb | 16.8 x 18.3 x 9.6 in; 12.3 lb |
| Controls and automation | Manual fan speeds, 2/4/6/8-hour timer, display off, filter indicator; no air-quality sensor | Particle sensor with auto mode, eco mode that stops the fan when clean air holds, air-quality indicator light, 1/4/8-hour timer, filter indicator |
| Filter upkeep | Check-filter indicator; maker advises genuine LEVOIT replacements for fit and performance | Washable pre-filter; deodorization filter about every 6 months; HEPA about every year |
LEVOIT Core 300-P: the small-room quiet pick
The LEVOIT Core 300-P in White suits bedrooms and offices where the unit sits a few feet from the bed or desk. Its cylinder draws air in from all sides, so it needs less clearance planning than a flat-backed box, and the 24 dB sleep mode with display-off is built for overnight running. The 3-stage filter set handles fine dust, smoke particles, pollen and pet dander, with a carbon stage for household odors, and LEVOIT sells alternate filters aimed at pet allergies, smoke and VOC-heavy rooms. Its limits are capacity and automation: 143 smoke CADR is roughly three-fifths of the Coway's, so in a living room it changes the air fewer times per hour, and without a sensor you set the fan yourself. It runs on 120 V for US use only, and the Amazon US listing observed on 09/12/2026 carried 4.7 stars across 108,731 ratings.
Coway Mighty AP-1512HH: the medium-room automatic pick
The Coway Airmega Mighty AP-1512HH in Black suits living rooms, large bedrooms and kitchens where cooking smells, pet odor and dust arrive in bursts. The particle sensor ramps the fan up when the air gets dirty and the eco mode stops it when clean air holds for a while, so you do less manual adjusting. The washable pre-filter catches hair and large dust before it reaches the inner filters, stretching the 6-month deodorization and 1-year HEPA replacement rhythm. Its limits are size and running gear: at 16.8 x 18.3 x 9.6 in and 12.3 lb it claims real floor or table space, and 77 W rated power exceeds the LEVOIT's 56 W. The Amazon US listing observed on 09/12/2026 carried 4.6 stars across 29,073 ratings.
What the ratings say about room size
Size the purifier to the room, not the headline square footage. Both makers publish the honest basis: about 4.8 air changes per hour in the rated room (222 sq ft for the LEVOIT, 361 sq ft for the Coway) and a much larger figure at one air change per hour. The EPA's air-cleaner guide makes the same point from the other side: pick a CADR large enough for the room you will actually use, remembering CADR ratings cover particles while gases and odors need an absorbent stage such as activated carbon. On that basis a 150–220 sq ft bedroom lands on the LEVOIT with air to spare, while a 300–360 sq ft living room lands on the Coway; putting the LEVOIT in the living room means fewer air changes per hour, and putting the Coway in a small bedroom means paying for capacity you will rarely use.
Where to check the exact variants
Compare the LEVOIT Core 300-P White (Amazon listing shipping from Amazon.com and sold by Amazon.com; no price line appeared in the observed page, so confirm the live price) against the Coway Mighty AP-1512HH Black (Amazon listing shipping from Amazon.com and sold by Amazon.com; no price line appeared in the observed page, so confirm the live price). Match the choice to the room: quiet small room goes LEVOIT, sensor-driven medium room goes Coway.