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Adding a Prefilter to an Air Filter: A Front-Line Defense Against Large Particles
A prefilter captures dust, hair, and other large debris before they reach the main filter, reducing airflow resistance, extending filter life, and lowering maintenance costs.
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Hydrocharged Electret Technology in Air Filters: An Introduction
Hydrocharging gives filter fibers a durable electrostatic charge, improving fine-particle capture while maintaining low airflow resistance and long service life.
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Matching Activated Carbon Pore Structure to Formaldehyde Adsorption
Effective formaldehyde adsorption depends on a balanced pore structure: 0.5–2 nm micropores provide capacity, while mesopores support diffusion and macropores reduce resistance.
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How HEPA Filters Perform Against Viruses of Different Sizes
HEPA filters capture viruses through diffusion, interception, impaction, and electrostatic attraction, including viruses carried in respiratory droplets and aerosols.
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How Pore Size Is Designed in Pre-, Medium-, and High-Efficiency Filters
Filter pore sizes are graded to match pollutant sizes while balancing efficiency, airflow resistance, service life, and cost across each filtration stage.
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How Much Better Is a Standalone Air Purifier Than an Air Conditioner’s Built-In Filter?
Built-in AC filters mainly catch coarse dust, while dedicated purifiers use HEPA, activated carbon, and high-volume circulation to remove fine particles and gases.
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Do Bedroom and Living Room Air Purifiers Require Different Filters?
Bedroom and living room purifiers face different pollutants. Learn how to choose HEPA, prefilter, activated carbon, and specialty media for each space.
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Which Air Purifier Filter Works Best for Cooking Fumes and Pet Odors?
Odor removal depends on matching filter media to the source. Compare activated carbon, catalytic, photocatalytic, and antibacterial filters for cooking and pet odors.
Company landline
010-60770969
Sales Phone/WeChat: 15601000090
Purchasing Management/WeChat: 13331060986
Company Phone: 010-60770969
Address: Room 1708, Building B, Jinyu International Center, Longyu East 1st Road, Huilongguan Street, Changping District, Beijing
©2026 Kelan Filtration Technology(Beijing) Group Co., Ltd. All rights reserved
Record Number: Jing ICP No. 2022016037-2
Technical Support: Suyuan Network
Sales Phone/WeChat: 15601000090
Purchasing Management/WeChat: 13331060986
Company Phone: 010-60770969
Address: Room 1708, Building B, Jinyu International Center, Longyu East 1st Road, Huilongguan Street, Changping District, Beijing
©2026 Copyright Beijing Kelan Fresh Air Technology Co., Ltd. All rights reserved
Record Number: Jing ICP No. 2022016037-2
Technical Support: Suyuan Network
