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中文
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Are Higher HEPA Filter Grades Always Better?
Air-purification performance depends on airflow multiplied by filtration efficiency. H11-H13 filters are already highly efficient, so the best grade depends on the application.
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How to Clean an Air Purifier Filter
A four-step method - disconnect power, remove the filters, clean them, and reinstall them - helps keep an air purifier safe and effective.
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Common Air-Filter Terms and Relevant Chinese Standards
Key terms include rated airflow, efficiency, resistance, initial and final resistance, and dust-holding capacity, alongside four relevant Chinese standards.
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Two Key Indicators for Air Filters
Filter area and dust-holding capacity are two key indicators. Increasing either can extend service life and reduce maintenance or energy costs.
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How HEPA and Activated-Carbon Filters Work
Air filters primarily capture particles through interception, while inertia, diffusion, gravity, and electrostatic effects also contribute.
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Five Common Pain Points with Fresh-Air Air Conditioners
Users commonly encounter inconvenient installation, costly filters, disappointing fresh-air performance, no heat exchange, and limited independent operation.
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Should You Buy a Fresh-Air Air Conditioner? How Is It Different from a Conventional Unit?
A fresh-air air conditioner looks much like a conventional unit but adds a dedicated outdoor-air duct, helping reduce indoor CO2 and formaldehyde buildup while providing cooling or heating.
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Can Fresh-Air Air Conditioners Replace Conventional Units and Become Mainstream?
As consumers seek healthier and more comfortable indoor air, fresh-air air conditioners combine cooling and heating with filtered outdoor-air supply, sterilization, smart controls, and self-cleaning.
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
