Coway Airmega Mighty Series: Which Mid-Size Purifier to Buy

By Simone Ellery · Updated 2026-10-24T02:53:05.425Z · How we choose · How we make money

We may earn a commission if you buy through links on this page, at no extra cost to you. Our picks are based on the data shown, not on what pays us.

Airmega Halo

$229.99 90-day range $229.99 – $229.99 trend: flat Lowest price in 90 days

Pros

• Lowest current price in the lineup at $229.99, $10.00 less than the Mighty AP-1512HH and $70.00 less than the MightyS
• Highest CADR in the group at 253.3 and largest coverage at 1898 sq ft
• Quietest listed operation at 17.8 dB
• Lowest power draw at 38 W and lightest at 9.7 lb

Cons

• 3-in-1 filter rated for 1 year, so annual filter replacement is required
• At $229.99 it is at its 90-day high as well as its low, with no discount off list

Who it's for: Buyers who want the strongest airflow and quietest operation in this family for the least money.

Check price at cowaymega.com

Airmega Mighty AP-1512HH

$239.99 90-day range $239.99 – $239.99 trend: flat Lowest price in 90 days

Pros

• 233 CADR and 1,748 sq ft coverage
• Filter life of 6 months / 1 year
• $239.99, at its 90-day low and only $10 more than the Airmega Halo

Cons

• 24 dB minimum noise is louder than the Halo's 17.8 dB
• 77 W power draw is higher than the Halo's 38 W

Who it's for: Buyers who want a mid-size Coway with strong CADR and long filter life at a price just above the Halo.

Check price at cowaymega.com

Airmega Mighty2

$269.99 90-day range $269.99 – $269.99 trend: flat Lowest price in 90 days

Pros

• 240 CADR and 1800 sq ft coverage for mid-size rooms
• 19 dB minimum noise, quieter than the Mighty AP-1512HH's 24 dB
• 1-year filter life and a timer of up to 12 hours
• $30 more than the Mighty AP-1512HH and $30 less than the MightyS AP-1512HHS

Cons

• 15.2 lb, heavier than the 12.3 lb Mighty AP-1512HH
• 56 W draw is higher than the Halo's 38 W

Who it's for: Buyers who want a mid-size Coway with long filter life, low noise and a 12-hour timer, at $30 above the Mighty AP-1512HH.

Check price at cowaymega.com

Airmega MightyS AP-1512HHS

$299.99 90-day range $299.99 – $299.99 trend: flat Lowest price in 90 days

Check price at cowaymega.com

How we chose

We compared the four Airmega Mighty-series models on the numbers that decide most purchases: CADR, coverage, noise, filter life and current price. The Mighty AP-1512HH is rated at 233 CADR across 1748 sq ft, runs at 24 dB, and lists a 6-month / 1-year filter schedule at $239.99. The Halo is rated at 253.3 CADR across 1898 sq ft at 17.8 dB, with a 1-year filter life, at $229.99 — $10.00 less than the Mighty AP-1512HH.

The Mighty2 is rated at 240 CADR across 1800 sq ft at 19 dB with a 1-year filter, at $269.99, which is $30.00 more than the Mighty AP-1512HH. The MightyS AP-1512HHS is rated at 210 CADR across 1575 sq ft at 24.4 dB with a 1-year filter, at $299.99 — $60.00 more than the Mighty AP-1512HH and $30.00 more than the Mighty2.

All four are listed at their 90-day low, with flat pricing over that window. We weighed the higher CADR and lower noise of the Halo against the Mighty AP-1512HH's filter schedule, and treated the Mighty2 and MightyS prices against their rated CADR.

Who should skip these

If you need coverage beyond roughly 1900 sq ft, none of these four fits: the Airmega Halo is the largest at 1898 sq ft, ahead of the Mighty2 at 1800 sq ft, the Mighty AP-1512HH at 1748 sq ft, and the MightyS AP-1512HHS at 1575 sq ft.

If weight matters, the Halo is the lightest at 9.7 lb. The Mighty AP-1512HH and MightyS AP-1512HHS are both 12.3 lb, and the Mighty2 is 15.2 lb.

Skip the Mighty2 and MightyS if you are shopping on CADR. The Mighty2 is rated 240 CADR and the MightyS 210, against 233 for the Mighty AP-1512HH, and they cost $30.00 and $60.00 more than the Mighty. The MightyS also carries the smallest coverage of the group at 1575 sq ft.

If a 6-month/1-year filter schedule is what you want, the Halo, Mighty2, and MightyS list a 1-year filter life instead.

How to choose the right one

Start with room size. The Airmega Halo is rated 253.3 CADR across 1898 sq ft, the Mighty AP-1512HH 233 CADR across 1748 sq ft, the Mighty2 240 CADR across 1800 sq ft, and the MightyS AP-1512HHS 210 CADR across 1575 sq ft. If your room is smaller than these figures, you are not giving up much by choosing a lower-CADR model.

Then weigh noise and filter life. The Halo runs at 17.8 dB with a 1-year filter, the Mighty2 at 19 dB with a 1-year filter, the Mighty AP-1512HH at 24 dB with a 6-month/1-year schedule, and the MightyS at 24.4 dB with a 1-year filter. The Mighty2 adds a timer of up to 12 hours.

Finally, look at the price steps. The Halo is $229.99. The Mighty AP-1512HH costs $10.00 more, the Mighty2 $40.00 more, and the MightyS $70.00 more than the Halo. Between the Mighty AP-1512HH and the models above it, the Mighty2 costs $30.00 more and the MightyS $60.00 more; the MightyS costs $30.00 more than the Mighty2.

Questions readers ask

By Simone Ellery · Published 2026-09-23 · Updated 2026-10-24