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Coway Airmega Airmega 450S(W) running cost

The Coway Airmega Airmega 450S(W) is rated at 399 kWh per year (ENERGY STAR test conditions). At the US average residential price of 18.3¢/kWh (July 2026), that is about $73.06 a year, or $6.09 a month.

Also listed as: Coway Airmega — Airmega 450S(W), Airmega 450S(BG), Airmega 450S(*), AP-2524C_WT, AP-2524C_BG, AP-2524C _*. (* or # in a model number stands for a colour/variant code.)

How it compares

Among 77 certified large-room (400+ sq ft) air purifiers (same size band), it ranks #70 for lowest running cost (class median $55.66/year). Recommended room size (sq ft): 687.

Cheaper-to-run air purifiers in the same size band

• Rainbow Luggable XXL — 75 kWh/yr, $13.73/yr
• Rainbow Luggable XL Ultra — 81 kWh/yr, $14.83/yr
• Rainbow Brisk Box Ultra — 94 kWh/yr, $17.21/yr
• Blueair 4412311000 — 181 kWh/yr, $33.14/yr
• Blueair 3332111100 — 193 kWh/yr, $35.34/yr

Specifications

Source: ENERGY STAR certified air purifiers dataset, record 4005915. Real-world use depends on hours of operation, settings and climate.

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