Model comparison
Coway Airmega 50 vs Airmega 100: personal-room rate and routine
The Airmega 50 and Airmega 100 share Coway's compact-cylinder idea and a useful mix of local controls, particle-responsive Auto and a color AQI cue. Their practical difference is not a new kind of sensor: it is how much room area each unit is rated to clean at a repeated-air-change pace, and how often the combined filter is expected to be replaced. Choose the rate first, then decide whether either body and its maintenance cadence suit the room.
Room rates: personal space or the next size up?
Coway lists the Airmega 50 at 500 square feet per hour of air change or 250 square feet at two changes per hour. Scaling the two-change value to a 4.8-ACH comparison gives about 104 square feet per unit. Coway's Airmega 100 page gives 810 square feet at one change per hour and 405 at two; a product-page graphic shows 167 square feet in 12.5 minutes, equivalent to 4.8 changes per hour. These are not interchangeable numbers: the 50 fits a personal room by the site's 47-square-foot starting tier but falls short of the 140-square-foot compact tier at 4.8 ACH, while the 100 clears compact but not the 219-square-foot small tier. Neither one-change headline is the fast-cleaning figure.
For two separate rooms that each need no more than the 50's personal-space rating, the observed Airmega 50 offer is a two-unit White bundle. The two purifiers do not merge into one larger-capacity machine. For one room between roughly 104 and 167 square feet on the 4.8-ACH comparison, the Airmega 100 is the more appropriate of these two. Above the 100's stated area, look at a higher-capacity model rather than treating an open doorway as additional purifier capacity.
Similar controls, different day-to-day limits
Both manuals describe a PM2.5 sensor, Auto and numbered airflow levels, a color-only AQI indicator, Sleep and a selectable night light; neither reviewed configuration documents app pairing or a numeric PM2.5 screen. The 50's manual adds three sensor-sensitivity settings and a 1/2/4/8-hour timer. The 100 also offers numbered speeds and scheduled shutoff, so someone who simply wants direct control need not step up for an app or display feature that neither has.
The Airmega 50 is a 6.7-inch-wide, 12.6-inch-tall cylinder and uses 14 watts in Coway's listed specification. Its manual and product page disagree on weight (3.4 versus 3.5 pounds), so do not choose it on a hard weight cap. The 100 is listed at 8.7 inches wide and deep, 15.6 inches tall and 6.6 pounds, with 25 watts. These are published inputs and body dimensions, not electricity-bill estimates; keep space around each model's intake and outlet.
Plan replacement and purchase quantity
Both models use one combined cartridge rather than separate customer-scheduled stages. Coway lists an eight-month expectancy for the Airmega 50 and one year for the Airmega 100. The 50's manual says not to wash or reuse its filter and recommends dry brushing or vacuuming the pre-filter; the 100's manual likewise says not to wash or reuse its assembly and recommends brushing or vacuuming visible pre-filter dust. Actual replacement timing can change with use and air conditions. Compare the exact replacement filter listing before ordering; a similar cylinder does not establish cross-model compatibility.
Coway lists two Airmega 50 White packages: two purifiers, or one purifier plus one extra filter (two eight-month filters are described as 16 months' supply). These are package differences, not separate purifier plans. Both offer pages also display conflicting sold-out/unavailable and in-stock messages while their Shopify records mark variants available, so check each exact offer rather than relying on its captured inventory text. Neither package changes the per-unit room rating. Coway's Airmega 100 has its own one-unit and package listings, whose contents should likewise be checked individually. If one larger small room, local Auto and a longer listed filter expectancy matter more than a two-unit quantity or shorter cartridge cycle, compare the Airmega 100 first. If two personal rooms need separate machines and the lower per-unit rating is enough, the 50 two-unit pack may be relevant. Read the Airmega 50 assessment and Airmega 100 assessment for the full operating and placement details.
Primary references: Coway's two-unit Airmega 50 offer, Airmega 50 filter-bundle offer, Airmega 50 manual, Airmega 100 page and its manual.