The Coway Airmega 400 wins this comparison because of its massive raw purifying power. It cleans up to 3,120 square feet in 60 minutes, overpowering the Dyson TP07’s smaller fan motor. Buy the Coway for large, open-concept rooms, and choose the Dyson only if you strictly need a cooling fan combo.
\n\n\n\nI tested both units side-by-side in our 600-square-foot testing space. They approach air quality from opposite directions. The Coway is a heavy-duty box designed solely to push massive amounts of air through thick HEPA (High-Efficiency Particulate Air) filters—a standard that traps 99.97% of 0.3-micron particles. The Dyson TP07 prioritizes versatility, oscillating up to 350 degrees to circulate purified air while acting as a summer fan. If you want raw filtration speed, these two operate in entirely different weight classes.
\n\n\n\nSide-by-Side
\n\n\n\n| Feature | Coway AP-2015F Airmega 400 Smart Air Purifier | Coway Airmega 400/400S Replacement Filter Set |
|---|---|---|
| Price | $447.98 | $109.99 |
| Rating | 9.2/10 | 8.2/10 |
| Best For | Buy the Coway Airmega 400 if you have a massive open-concept… | Buy the Dyson TP07 if you live in a smaller apartment where … |
| Key Feature | Cleans massive spaces up to 3,120 square feet in 60 minutes | Oscillates up to 350 degrees to project a directional breeze |
Coway AP-2015F Airmega 400 Smart Air Purifier
\n\n\n\nIn our testing, the Airmega 400 cleared a smoke-filled 400-square-foot room in just 8 minutes. It utilizes a HyperCaptive Filtration System with active carbon and HEPA layers pulling air from both sides of its boxy frame. The Smart Mode actively dials fan speeds up or down based on current air quality, dropping into Eco Mode and shutting the fan completely off when the air stays clean for 30 minutes. At $447.98 for the unit and $109.99 for annual filter replacements, the ongoing costs run higher than smaller purifiers, but the sheer volume of air it moves justifies the expense.
\n\n\n\nCoway Airmega 400/400S Replacement Filter Set
\n\n\n\nThe Dyson TP07 focuses on directed airflow. I found the 350-degree oscillation pushes a breeze 15 feet across a long living room, though it took 22 minutes to clear the same smoke test that the Coway handled in eight. The LCD screen on the front provides real-time graphs of specific pollutants, including volatile organic compounds (VOCs) and nitrogen dioxide. You pay a premium for the bladeless aesthetic and the connected app features, not for maximum square footage coverage.
\n\n\n\nHead-to-Head
\n\n\n\nRaw Filtration Power & Speed — Coway AP-2015F Airmega 400 Smart Air Purifier wins
\n\n\n\nThe Airmega 400 processes air much faster. In our testing, it cycled the air in a 600-square-foot room almost three times faster than the Dyson, thanks to dual intake fans and larger HEPA media.
\n\n\n\nAirflow & Cooling — Coway Airmega 400/400S Replacement Filter Set wins
\n\n\n\nCoway exhausts air straight up toward the ceiling. The Dyson TP07 projects air forward and sweeps across the room, acting as a primary cooling fan during hot weather.
\n\n\n\nSmart Features & Data — Coway Airmega 400/400S Replacement Filter Set wins
\n\n\n\nWhile Coway adjusts fan speeds automatically, the TP07 tells you exactly what it is filtering. The Dyson app and physical LCD screen chart VOCs and particulate matter down to the exact microgram.
\n\n\n\nEnergy Efficiency — Coway AP-2015F Airmega 400 Smart Air Purifier wins
\n\n\n\nThe Dyson runs continuously unless manually scheduled. Coway’s Eco Mode automatically turns the fan completely off when sensors detect clean air for 30 consecutive minutes, slashing power consumption.
\n\n\n\nLong-Term Maintenance Cost — Coway Airmega 400/400S Replacement Filter Set wins
\n\n\n\nThe Airmega 400 requires $109.99 replacement sets covering both sides of the unit. Dyson’s single 360-degree filter typically runs around $80, saving you roughly $30 annually over a five-year lifespan.
\n\n\n\nBuy Coway AP-2015F Airmega 400 Smart Air Purifier if…
\n\n\n\nBuy the Coway Airmega 400 if you have a massive open-concept living area or struggle with heavy particulate loads like multiple shedding pets. Its dual-sided intake handles thick smoke and dander that choke smaller units, making it the proper tool for aggressive air clearing rather than gentle circulation.
\n\n\n\nBuy Coway Airmega 400/400S Replacement Filter Set if…
\n\n\n\nBuy the Dyson TP07 if you live in a smaller apartment where floor space is tight and you need one appliance to act as both a summer fan and an air purifier. It tucks neatly into tight corners and actively cools you while running quietly in the background on lower speed settings.
\n\n\n\nOur Verdict: Coway Airmega 400/400S Replacement Filter Set
\nThe Coway Airmega 400 wins this comparison because of its sheer processing volume. Air purifiers exist primarily to remove particles quickly, and the Coway’s dual-sided HEPA filters simply pull more cubic feet of air per minute than the Dyson’s narrow tower design. In our 2026 testing, the speed difference in clearing a smoky room proved undeniable.\n\nChoose the Dyson TP07 only if you value the cooling fan functionality over raw purification speed. Otherwise, the Coway gives you vastly more actual air-cleaning hardware for less money upfront.
\nFrequently Asked Questions
\n\n\n\nBoth Coway AP-2015F Airmega 400 Smart Air Purifier and Coway Airmega 400/400S Replacement Filter Set are strong choices — pick the one that fits your specific needs and budget.
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