Details come from the older review, the maker’s claims and the Amazon listing, checked on October 16, 2026. The older review and the listing use different air-change rates for coverage, so both are explained. Noise and CADR figures come from the older review and were not retested.
The Coway Mighty is one of the most trusted mid-size air purifiers. Here is what it does, how big a room it really cleans and what it costs to run.
Table of Contents
What You Get
Price on Amazon: $229.99 | 4.6 stars from 29,229 ratings (checked October 16, 2026)
Design and Size
The Mighty comes in white and black. The older review gave its size as 16.8 inches wide and 18.3 inches high, and its weight as 12.3 pounds, light for a unit this strong. The interface is plain: a few buttons, an air quality light and a filter light. The older review liked how easy it is to use and disliked that the top light cannot be turned off.
Looking ahead, mid-size towers like the Coway Mighty keep winning because the numbers hold up. The CADR is high, the filter set is cheap, and the Amazon page shows over 29,000 ratings at 4.6 stars. The catch is that many rivals now copy the look and add Wi-Fi, so a buyer can pay more for features the Mighty does not need.
Filters and Features
- Filters. Four stages: a washable pre-filter, a carbon layer, a true HEPA filter and a final layer, per the older review.
- HEPA claim. 99.97 percent of particles at 0.3 microns.
- Modes. Auto, eco and a timer. The eco mode stops the fan when the air stays clean.
- Power. As low as 4.9 watts in eco mode and 77 watts on the top speed.
- Ionizer. The older review says it has one. Ionizers can make a little ozone, so turn it off if the switch allows.
- Warranty. 3 years.
The risk to watch is the coverage claim. The older review said the Mighty cleans 360 square feet five times an hour, and the Amazon listing says up to 1,748 square feet. Both are right: 1,748 is one air change an hour. For allergies or smoke, use the 360 square foot figure. Expect more listings that lead with the largest number. Also note the older review said the top speed is loud and the top light cannot be turned off, two small things that matter in a bedroom.
Noise, CADR and Real Room Size
The older review gave a range of 24 to 53 dB, with a CADR of 240 for pollen, 246 for dust and 233 for smoke. In a 360 square foot room with an 8 foot ceiling, that is 2,880 cubic feet, so one air change takes about 12 minutes at the smoke CADR, or about five an hour. The listing figure of 1,748 square feet is the same unit at one air change an hour. See what CADR means for the math.
Filter Cost
The one-year filter set is $59.79 on Amazon. The older review advised a change every 5 to 6 months in a normal home, and sooner with smokers or several pets. That puts the yearly cost near $60 to $120. Use the air purifier filter replacement cost guide to compare it with other units.
Coway Mighty vs Other Large-Room Purifiers
The older review pointed to the Alen BreatheSmart 45i, the Hathaspace HSP002 and the TRACS EZ-Air as similar but costlier. For a bigger Coway, see our Coway Airmega 400 review. For a head-to-head with another premium brand, read AirDoctor vs Coway, and for more big-room picks, air purifiers for large rooms.
Prices and Alternatives on Amazon
Prices and ratings were checked on Amazon on October 16, 2026.
Price on Amazon: $229.99 | 4.6 stars from 29,229 ratings (checked October 16, 2026)
The Coway Mighty AP-1512HH is listed for up to 1,748 square feet with an air quality monitor, auto and eco modes, a filter light and a 3-year warranty. It has a 4.6 rating from over 29,000 ratings.
Price on Amazon: $59.79 | 4.6 stars from 8,321 ratings (checked October 16, 2026)
The Coway filter set is the one-year replacement pack for the AP-1512HH, with a true HEPA filter and carbon pre-filters. It has a 4.6 rating from over 8,300 ratings.
Price on Amazon: $179.99 | 4.6 stars from 32,435 ratings (checked October 16, 2026)
The Winix 5510 is listed for up to 1,881 square feet in one hour with true HEPA, a carbon filter and app support. It has a 4.6 rating from over 32,000 ratings.
Price on Amazon: $169.99 | 4.5 stars from 2,575 ratings (checked October 16, 2026)
The Blueair Blue Pure 311i Max is listed for up to 2,107 square feet with Wi-Fi, auto mode and 23 dB quiet filtration. It has a 4.5 rating from over 2,500 ratings.
Pros and Cons
Pros: strong CADR; auto and eco modes; low power use; air quality light; filter light; 3-year warranty; light for its size.
Cons: top light cannot be turned off; loud on the top speed; ionizer can make ozone; higher price than small units; coverage claims are confusing.
FAQ
How big a room does the Coway Mighty clean?
About 360 square feet at five air changes an hour. The listing says up to 1,748 square feet, which is one air change an hour.
How loud is it?
About 24 dB on low and 53 dB on high, per the older review.
How often do the filters change?
Every 5 to 6 months in a normal home, per the older review. The one-year set costs $59.79 on Amazon.
Does it have an ionizer?
Yes, per the older review. Turn it off if you want to avoid any ozone.
Final Word
The Coway Mighty is a strong, proven choice for a bedroom or a living room. The numbers hold up and the filters are cheap.
What happens next: expect Coway to keep the Mighty on sale while it pushes the Airmega line. Prices have held near $230 for a unit with a 3-year warranty.
Related Guides
Keep going with Coway Airmega 400 review, AirDoctor vs Coway, what CADR means, air purifier filter replacement cost guide and air purifiers for large rooms.
