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Xiaomi Mi Air Purifier 3C: High-Efficiency 320 m³/hr CADR HEPA + Activated Carbon for 452 Sq.Ft. Environments
The Xiaomi Mi Air Purifier 3C delivers a high-performance Clean Air Delivery Rate (CADR) of 320 m³/hr for particulate matter. Its 3-stage filtration system utilizes a True HEPA filter to capture 99.97% of particles as small as 0.3 microns. Engineered for spaces up to 452 sq.ft., it provides a full room air change approximately every 15-20 minutes. The device operates at a variable noise range between 30 dB and 61 dB, balancing acoustic comfort with volumetric flow.
Quick Answer
The Xiaomi Mi Air Purifier 3C is highly recommended for rooms up to 452 sq.ft. that require medical-grade 99.97% HEPA filtration to mitigate allergens and PM2.5 pollutants.
✓High-efficiency CADR of 320 m³/hr for rapid air turnover.
✓Integrated 3-layer filter with 99.97% efficiency for 0.3-micron particles.
✓Maximum effective coverage area of 452 sq.ft. for versatile room placement.
✓High-precision laser PM2.5 sensor for real-time air quality indexing.
✓Low-noise operation starting at 30 dB for nighttime use.
The Xiaomi Mi Air Purifier 3C is a technical leader in the budget segment, offering a 320 m³/hr CADR and 99.97% HEPA filtration that rivals more expensive units.
✓ Who Should Buy
- •Users in 452 sq.ft. or smaller apartments seeking rapid air turnover.
- •Allergy sufferers requiring 99.97% filtration of 0.3-micron particles.
- •Tech-focused consumers wanting real-time AQI monitoring via PM2.5 sensors.
✕ Who Should Avoid
- •Industrial settings requiring CADR exceeding 500 m³/hr.
- •Large open-plan halls significantly larger than 452 sq.ft.
Product Overview
The Xiaomi Mi Air Purifier 3C is a precision-engineered environmental tool designed to achieve a 320 m³/hr CADR within residential or office spaces. Utilizing a 360-degree air intake system, it processes air through a triple-layer filter that includes a primary pre-filter, a True HEPA layer for 99.97% particle removal, and an activated carbon stage. This configuration is optimized for a 452 sq.ft. footprint, ensuring that pollutants down to 0.3 microns are effectively sequestered. The unit features an integrated PM2.5 laser sensor that feeds real-time data to a digital LED display, allowing users to track AQI levels instantly. Control logic is managed via the Mi Home App, providing remote access to the 320 m³/hr performance modes. With a peak noise ceiling of 61 dB, the 3C model maintains a high clean air output without exceeding commercial acoustic thresholds. This model is a compact solution for 452 sq.ft. areas requiring consistent 99.97% filtration density.
| Brand | xiaomi |
| Model Name | Mi Air Purifier 3C |
| Model Number | AC-M14-SC |
| Category | Air Purifier |
| Sub Category | Room Air Purifier |
| Purifier Type | HEPA + Activated Carbon |
| Installation Type | Floor Standing |
| Coverage Area Sqft | 452 |
| Room Size | Medium-Large |
| Usage | Home |
| Launch Year | 2021 |
| Model Year | 2021 |
| Country Of Origin | China |
| Manufacturer | Xiaomi Corporation |
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Engineering Analysis
The engineering architecture of the Xiaomi Mi Air Purifier 3C centers on a high-static pressure centrifugal fan capable of maintaining a 320 m³/hr CADR against the resistance of a 3-layer filter stack. The 360-degree cylindrical intake reduces the velocity of air at the entry point, allowing for more efficient mechanical interception of large particles before they reach the 99.97% efficient HEPA media. By utilizing 0.3-micron filtration as the primary standard, the 3C ensures that the pressure drop across the filter does not compromise the 320 m³/hr throughput. The manual speed control logic allows the user to override the PM2.5 sensor's automated throttling, which is essential for purging 452 sq.ft. rooms after a high-pollution event. Furthermore, the inclusion of an activated carbon layer facilitates gas-phase adsorption of odors and VOCs that bypass standard 0.3-micron HEPA fibers. The real-time AQI feedback loop is calibrated to the 320 m³/hr flow rate, ensuring that the LED indicators accurately reflect the current concentration of PM2.5. Operational noise is modulated between 30 dB and 61 dB through a proprietary blade design that minimizes turbulence at high RPM. This technical synergy allows the 3C to sustain air quality in 452 sq.ft. zones while adhering to strict energy efficiency and noise standards.
Technical Support & FAQs
Engineering Analysis
The engineering architecture of the Xiaomi Mi Air Purifier 3C centers on a high-static pressure centrifugal fan capable of maintaining a 320 m³/hr CADR against the resistance of a 3-layer filter stack. The 360-degree cylindrical intake reduces the velocity of air at the entry point, allowing for more efficient mechanical interception of large particles before they reach the 99.97% efficient HEPA media. By utilizing 0.3-micron filtration as the primary standard, the 3C ensures that the pressure drop across the filter does not compromise the 320 m³/hr throughput. The manual speed control logic allows the user to override the PM2.5 sensor's automated throttling, which is essential for purging 452 sq.ft. rooms after a high-pollution event. Furthermore, the inclusion of an activated carbon layer facilitates gas-phase adsorption of odors and VOCs that bypass standard 0.3-micron HEPA fibers. The real-time AQI feedback loop is calibrated to the 320 m³/hr flow rate, ensuring that the LED indicators accurately reflect the current concentration of PM2.5. Operational noise is modulated between 30 dB and 61 dB through a proprietary blade design that minimizes turbulence at high RPM. This technical synergy allows the 3C to sustain air quality in 452 sq.ft. zones while adhering to strict energy efficiency and noise standards.