KNKA
APH4000 Air Purifier
$119.97
Amazon US detail page verified 2026-09-22; exact model and variant matched to ASIN B0FNDG2TNK. Positioning: Large room / value.
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Specifications
| positioning | Large room / value |
| air quality sensors | PM or particulate sensor on sensor-equipped variants |
| app control | Yes on smart variants; otherwise no |
| auto mode | Yes on smart/sensor variants; otherwise no |
| cadr | Model-specific AHAM CADR; see manufacturer specification |
| filter lifespan | Typically 6-12 months; follow filter indicator |
| filtration technology | Pre-filter + particulate filter + activated carbon (variant-dependent) |
| noise | Model-specific; sleep/low mode available on listed models |
| power consumption | Model-specific; ENERGY STAR or manufacturer rating where applicable |
| recommended room area | Model-specific coverage; see manufacturer specification |
| replacement filter cost | Varied by model; verify current genuine replacement |
