Xiaomi Smart Air Purifier 4 Compact

Xiaomi Smart Air Purifier 4 Compact (often just called the 4 Compact) and Xiaomi Smart Air Purifier 4 Lite are two distinct compact models in Xiaomi’s lineup—no single “4 Compact Lite” model exists, but queries often blend them due to similar naming and compact designs. Both are great for small spaces like bedrooms, desks, or apartments in dusty/polluted areas like Nairobi, with smart app control via Mi Home/Xiaomi Home.

Quick Comparison: 4 Compact vs. 4 Lite

• 4 Compact (smaller, entry-level): Best for very tight spaces or single-person use.
  • Particle CADR: 230 m³/h (about 135 CFM)
  • Recommended room size: 16–27 m² (roughly 172–290 ft², or up to ~200–300 ft² at lower air changes)
  • Dimensions: ≈ Φ220 × 355 mm (cylindrical, like a tall vase)
  • Weight: ≈ 2.2 kg
  • Noise: As low as 20 dB in sleep mode, up to ≤60 dB max
  • Power: 27W max, very energy-efficient (~0.7 kWh/day)
  • Design: Dual-use (desktop or floor), small footprint, easy to move
• 4 Lite (mid-tier compact, more powerful): Better for slightly larger rooms or faster cleaning.
  • Particle CADR: 360 m³/h (about 212 CFM)
  • Recommended room size: 25–43 m² (up to ~330–460 ft²)
  • Dimensions: ≈ 24 × 24 × 53.4 cm (square base, taller)
  • Weight: ≈ 4.8 kg
  • Noise: Quiet at low speeds, louder at max
  • Power: Higher but still efficient
  • Design: Compact base (smaller than A4 paper), easy storage

The 4 Lite generally outperforms the Compact in speed and coverage (clears air faster, handles more pollutants), making it the “sweet spot” for many users per reviews. The Compact wins on ultra-portability, lower price, and minimal energy use.

Filter Details (for Both Models)

Both use a 3-in-1 high-efficiency filter (pre-filter + high-efficiency layer + activated carbon):

• Removes 99.97% of 0.3μm particles (PM2.5, dust, pollen, pet dander, smoke, allergens, some microplastics)
• Activated carbon tackles odors, VOCs, and formaldehyde
• Lifespan: 6–12 months (longer than many competitors; app tracks usage and reminds you)
• Compact uses a cylindrical, bottom-twist design (easy rotate/pull out)
• Lite often has a top-lift design (press side clips/buttons)
• Official replacements: ~$30–$60 (check Xiaomi site, Amazon, or local sellers)
• Third-party options exist but stick to compatible ones for best fit/performance

Other Shared Features

• Smart control: App monitoring (real-time AQI, PM2.5 sensor), auto mode, schedules, voice (Alexa/Google), screen dim/off for sleep
• Quiet & efficient: Sleep mode ultra-quiet, low power
• Filtration tech: Melt-blown PP fibers (better airflow than dense fiberglass HEPA in some designs)