Air purifier HEPA replacement filter Xiaomi SCG4021GL, 360° triple-layer, CADR 380 m³/h, 200×200×293 mm

Replacement HEPA filter Xiaomi SCG4021GL is a 360° triple-layer air purification cartridge designed for compatible Mi Air Purifier models. With a cylindrical construction and CADR 380 m³/h (223 CFM), the filter provides whole-drum intake and efficient removal of airborne particles. Its compact dimensions of 200×200×293 mm suit small to medium rooms in homes and offices and allow quick installation into supported purifier models.

Advantages

The 360° triple-layer design captures particles from all directions, increasing the effective service area and reducing recirculation of unfiltered air. A high CADR rating supports fast air exchange in enclosed spaces, improving removal of dust, pollen, pet dander and fine particulate matter. The structure balances filtration efficiency and airflow to maintain purifier performance while keeping noise and energy impact minimal.

Suitable for

• General home air purification in living rooms and bedrooms
• Allergy relief by reducing pollen, dust and pet allergens
• Small offices and workspaces requiring improved indoor air quality
• After-construction or cleaning periods with elevated dust levels

Key specifications

• Filtration layout: 360° cylindrical triple-layer assembly
• CADR (clean air delivery rate): 380 m³/h (223 CFM)
• Dimensions: 200 × 200 × 293 mm
• Primary capture: particulate matter (including PM2.5), dust, pollen and pet dander
• Compatibility: designed for compatible Mi Air Purifier models with cylindrical filter bay

How to use

Ensure the air purifier is switched off and unplugged before replacing the filter. Open the purifier according to the device manual, remove the used filter and insert the new cylindrical HEPA element with the correct orientation so that the seal seats evenly. Close the purifier housing, plug in and power on the unit. Reset any filter life indicator on the purifier following the manufacturer’s procedure to ensure accurate maintenance reminders.

Usage recommendations

Replace the filter at intervals recommended by the air purifier manufacturer or sooner in environments with higher particle loads. Regularly inspect and, if available, clean pre-filters to extend service life. Operate the air purifier continuously or in modes appropriate for room size to maintain indoor air quality; consider higher fan speeds temporarily after events that raise particulate levels.