Coway Airmega 150 review

If quiet is the only thing that matters, the Airmega 150 has the lowest published figures on this list: Coway lists 19.98 dB(A) on the lowest setting and 48.3 dB(A) at the top. It is a slim unit, 6.5 inches deep, so it can stand next to a dresser or along a nursery wall without taking much floor space. Filtration has three stages, a pre-filter you can pull out for cleaning, a deodorization filter and a HEPA filter, with the deodorization filter rated for 6 months and the HEPA filter for a year. The catch is capacity. At 4.8 air changes per hour Coway rates it for 214 square feet, and its CADR of 153 for smoke and 161 for dust is about two thirds of the Mighty. There is no app. At $189.99 it ranks fifth because the Mighty covers more room for $50 more, but for a small nursery it is a very quiet choice.

Who it is for

Small nurseries and kids' rooms where the quietest possible low setting matters most.

Price

$189.99 on the Coway US store when checked.

Airmega 150 $189.99 Regular price $189.99
Quoted from the vendor pricing page on November 8, 2026.

Key features

• Pre-filter, deodorization filter and HEPA filter
• Published noise level of 19.98 to 48.3 dB(A)
• Four airflow settings: Auto, 1, 2 and 3
• Rated for 214 square feet at 4.8 air changes per hour
• Slim 6.5 inch depth that fits beside a crib or dresser

Strengths and weaknesses

• Strength: Lowest published noise floor and ceiling on this list
• Strength: Slim body suits tight nursery layouts
• Strength: Easy pull-out pre-filter for cleaning
• Weakness: Small room rating of 214 square feet
• Weakness: No app or Wi-Fi
• Weakness: Fewer fan settings than the Mighty

Key facts

• Price: $189.99
• Noise level: 19.98 to 48.3 dB(A)
• Room size at 4.8 ACH: 214 sq ft
• CADR: 153 smoke, 161 dust, 220 pollen
• Dimensions: 13.4 x 18.5 x 6.5 in

Where it ranks

Coway Airmega 150 is No. 5 in our Best Quiet Air Purifiers verdict.