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That of course is the units carbon filter

Coverage area: 219 square feet | CADR Rating: 141 (smoke), 140 (dust), 145 (pollen) | Minimum noise level: 24 dB | Dimensions: 8.7 x 8.7 x 14.2 inches | Weight: 7.48 pounds | Returns and warranty: Free returns within 30 days (if purchased directly from Levoit), 2-year limited warranty Pros: Affordable price point Compact design for smaller spaces Smoke-specific replacement filters available Cons: Some users report it can be loud The Levoit Core 300 Air Purifier is a great choice for spaces up to 219 square feet, capable of refreshing the air up to five times an hour in rooms of this size

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All that without bulging out