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Haier KFR-35GW Fresh-Air Air Conditioner Recommendation
Haier KFR-35GW provides 20 m³/h of fresh air, five-stage filtration, extended high-temperature disinfection and a stated 99% disinfection rate.
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Eight Essential Functions of a Fresh-Air System
Air pollution includes PM2.5, harmful gases, and odors. A fresh-air system should filter all of them to deliver cleaner, safer air indoors.
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Single-Flow Wall-Mounted Fresh-Air Units Are the Market Mainstay
More than 66% of fresh-air units sold are low-airflow, single-flow wall-mounted models because they are compact, affordable, retrofit-friendly, and effective.
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Central Fresh-Air Systems Cannot Independently Control Every Room's Airflow and Temperature
Central fresh-air systems can ventilate and purify the whole home, but they cannot independently control the fresh-air volume and supply-air temperature in each room.
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One Wall-Mounted Fresh-Air Unit Cannot Ventilate the Whole Home
A wall-mounted fresh-air unit can ventilate and purify only one room. Even a high-airflow model cannot provide whole-home ventilation because of how positive pressure works.
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A Higher Filter Grade Is Not Always Better
For filters of the same area, a higher grade increases resistance, reduces fresh-air volume, complicates noise control, shortens service life, and raises consumables costs.
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Fresh-Air Volume Is Not the Same as Total Airflow
A high-airflow unit does not necessarily supply more outdoor air. Total airflow may combine fresh outdoor air with recirculated indoor return air.
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More Fresh-Air System Airflow Is Not Always Better
Fresh-air volume should match the floor area and number of occupants. Too much wastes electricity and filters and increases noise; too little limits ventilation.
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
