For the first time in Vietnam, an air purifier featuring the highest-grade HEPA filter – MERV17 – and high-efficiency formaldehyde filtration has been introduced. This advanced air purifier effectively removes pollutants, ensuring your family breathes truly clean air. It utilises 100% natural filtration technology without ions or ozone, making it safe for health, especially for young children.
3X2 Multi-Layer Filtration System – 3 Stages x 2 Layers
- Primary Filters (MERV7): Two primary filters remove larger pollutants and dust particles greater than PM10, extending the lifespan of the main filter.
- Activated Carbon Filters: Two activated carbon filters eliminate TVOCs (volatile organic compounds from sources like paint and cleaning agents), toluene, formaldehyde, and other harmful odors from household items such as wood, paint, sawdust, and fabrics.
- High-Performance HEPA Filters (MERV17): Two HEPA filters effectively capture fine and ultra-fine dust particles ranging from PM10 to PM2.5.
Comparison of A.O.SMITH Primary Filter vs. Standard Primary Filters

Ultra-Fast Air Purification: The A.O.SMITH primary filter offers exceptionally rapid air purification.

High-Density Carbon Wrap:
Contains 1kg of high-quality activated carbon, efficiently absorbing harmful substances such as formaldehyde, toluene, and other TVOCs.
HEPA Filter MERV17

- Real-Time PM2.5 Display: The air purifier features patented technology that displays real-time measurements of ultra-fine PM2.5 dust.
- Electronic Screen: The A.O.SMITH air purifier includes three intelligent sensor functions that measure dust levels and detect harmful gases in the air.
- Smart Sensor System: Equipped with three automatic adjustment modes for easy and convenient use.
- Environmentally Friendly: Utilises 100% natural filtration technology, free from ions or ozone, ensuring safety for health, particularly for young children.
Technical Specifications
- Model: A.O.SMITH KJ420F-B01
- Filtration Capacity:
- Dust: 420m³/h
- Formaldehyde: 100 m³/h
- Dust Removal Efficiency:
- Dust: P4 level
- Formaldehyde: F4 level
- Power Consumption: 39 W
- Filtration Efficiency:
- Dust: 10.8m³/(W.h)
- Formaldehyde: 2.6m³/(W.h)
- Noise Level: 59 dB(A)
- Suitable Room Size: 15 ~ 45m²
- Voltage: 220V~/50Hz
- Dimensions (W x D x H): 381 x 275 x 708mm
- Weight: 14kg
Product design, features, and specifications are subject to change without prior notice.