Model comparison

Airmega Mighty, Airmega 150 or Core 400S-P?

These three models can appear in the same medium-room search, but they do not offer the same clean-air rate or day-to-day routine. Use the manufacturer’s 4.8-air-change figure if you want frequent turnover; larger one-air-change headlines describe a slower pace. Then compare the filter schedule, controls, footprint and any special function you actually need.

Three different room scales

The Coway Airmega Mighty AP-1512HH is rated for 361 square feet at 4.8 air changes per hour, 874 at two changes, or 1,748 at one. The Airmega 150 is rated for 214 square feet at 4.8 ACH, 518 at two, and 1,035 at one. The Levoit Core 400S-P has a 358-square-foot 4.8-ACH room rating. That makes the Mighty and Core 400S-P close on the frequent-turnover size claim, while the AP150 serves a smaller footprint. None should be chosen from its broad one-change headline if your plan is closer to five air changes per hour.

For example, a room that needs at least 350 square feet at 4.8 ACH fits the two larger published ratings, not the AP150’s 214. If the true minimum is 370 square feet, the AP-1512HH and Core 400S-P both fall short of their published 361- and 358-square-foot figures. The finder also offers an optional two-ACH input: Coway lists the AP-1512HH at 874 square feet and the AP150 at 518; a different rate basis should not be substituted for the 4.8-ACH comparison.

Controls and feedback are not the same

The AP-1512HH uses local buttons and particle-responsive Auto; its manual speeds are 1–3, and its Eco mode stops the fan after 30 minutes without detected pollution. Coway also describes an ionizer that can be switched off, so this model is not a good choice if ionizer hardware itself is prohibited. The AP150 uses local controls and sensor-based Auto with speeds 1–3; its manual offers sensor-sensitivity adjustment. Neither Coway product’s exact model manual documents phone app operation.

The Core 400S-P adds app-connected functions and numeric particle feedback in its own model review. Choose it when those functions justify connected setup; do not treat them as a room-size increase beyond its published 358-square-foot rating. The two Coways instead provide color air-quality indicators, not numeric PM2.5 readings. A colored sensor light indicates a broad level, not a measured concentration to compare with a monitor.

Compare the routine and the cabinet

The Mighty has a washable pre-filter plus separate deodorization and True HEPA filters, with manual intervals of two to four weeks for the screen, six months for deodorization and one year for HEPA on the stated use basis. It is the widest here at 16.8 inches and needs wall and overhead clearance. The AP150’s screen is also washable, with separate deodorization and HEPA replacement; its 13.4-inch width and 6.5-inch depth make the cabinet shallower, although the manual still calls for side clearance. The Core 400S-P has its own app-linked filter and sensor routine, described in its exact review; do not assume its maintenance is interchangeable with Coway’s cartridge layout.

The Airmega 100 is another reasonable smaller-room comparison when an especially compact body matters: its 167-square-foot 4.8-ACH figure is rate-derived from Coway artwork stating 167 square feet per 12.5 minutes, rather than an explicit label in the specification table. Its 405-square-foot figure is at two ACH. Those two values must not be conflated.

Which tradeoff fits?

Shortlist the Mighty for a medium room, physical controls, sensor-adjusted Auto and a filter plan you are willing to maintain; treat the ionizer toggle as a real preference, not a marketing extra. Pick the AP150 when its smaller 214-square-foot 4.8-ACH rating is enough and you want a shallower Coway form. Consider the Core 400S-P when app control or a numeric on-unit reading changes the daily routine. All three published figures are manufacturer ratings; this guide is not a room test, and open doorways, ceiling height and chosen fan setting affect practical fit.

Sources: the linked Coway AP-1512HH product page and manual, Coway’s Airmega 150 page, and the exact Levoit Core 400S-P page.