Xiaomi Smart Air Purifier 4 Pro Key Features: ✅ What’s Good 1. Strong air cleaning performance The purifier delivers a CADR (Clean Air Delivery Rate) up to 500 m³/h, which allows it to clean a room of about 35‑60 m² in under about 15 minutes (for a typical living room size). 2. Effective filtration and odor control It uses a three‑in‑one filter (pre‑filter high‑efficiency filter activated carbon). It claims to eliminate ~99.97% of particles down to 0.3µm and has a large activated carbon load (65