Introduction to the Kosmen KM-A250 Fresh Air Ventilation and Air Purification System

The Kosmen KM-A250 is an intelligent air exchange system that operates with a two-way circulation mechanism. It continuously supplies treated fresh air from outside into the room while expelling polluted air, including CO₂, to the outside. This makes it an ideal solution for eliminating oxygen deficiency, stuffiness, and fatigue commonly found in enclosed spaces.

Structure of the Kosmen KM-A250 Fresh Air System

Operating Principle

• Air Supply: The unit draws in oxygen-rich outdoor air, which passes through the heat recovery core where heat exchange occurs without mixing the air streams. The air then moves through filtration layers that remove fine dust, bacteria, and allergens before being supplied into the room.
• Air Exhaust: Polluted indoor air (containing CO₂, odors, and humidity) is drawn into the unit, passes through the heat exchanger to transfer heat to the incoming air, and is then discharged outside.

Advantages of the Kosmen KM-A250 Fresh Air Ventilation and Air Purification System

Ceiling-mounted design for space optimization

The Kosmen KM-A250 is designed for ceiling installation, saving floor space and avoiding obstruction in daily activities. This creates a more open and comfortable living environment.

Ceiling mounting also allows filtered air to be distributed evenly throughout the space, minimizing airflow “dead zones” and delivering a more pleasant and relaxing experience compared to floor-standing units.

Fresh air supply – eliminating stuffiness

In enclosed spaces, CO₂, fine dust, and odors often cause discomfort. Especially in air-conditioned bedrooms, people may wake up feeling stuffy and fatigued due to high CO₂ levels affecting respiration. The fresh air supply function continuously brings in clean air, ensuring a constant flow of oxygen and improving overall breathing quality.

The Kosmen KM-A250 features dual large-diameter air ducts for intake and exhaust, combined with a pre-filter and either an F8 or HEPA H13 filter, effectively removing harmful particles and fine dust. This creates a clean airflow delivered into the room—representing a new-generation clean air solution for modern homes.

Efficient heat recovery

Introducing hot outdoor air directly into an air-conditioned room typically causes temperature imbalance, forcing the AC to work harder and consume more energy. To solve this, the Kosmen KM-A250 is equipped with an advanced Cross Flow SY heat exchanger. The two air streams pass through the exchanger, transferring heat without mixing.

Notably, the heat recovery system can be flexibly turned on or off depending on actual needs. Users can activate it to save energy and maintain stable indoor temperatures or turn it off in favorable weather conditions to maximize fresh air flow. This flexibility allows the unit to adapt to various environments and usage habits.

With a heat recovery efficiency of 75–80%, the system helps balance incoming air temperature close to indoor levels (only 1–2°C difference). This mechanism maintains a stable, comfortable environment while optimizing energy consumption and significantly reducing operating costs.

Heating element – solution for cold weather

In colder regions such as Northern Vietnam or the Central Highlands, low winter temperatures can make direct intake of outdoor air uncomfortable. The heating element warms incoming fresh air instantly, preventing thermal shock and improving comfort.

This is an optional accessory, not built into the unit, designed for users who need additional heating during colder seasons. Besides heating, it also helps reduce humidity in the incoming air, especially useful during humid conditions, keeping indoor spaces dry, clean, and comfortable.

Smart control system

The Kosmen KM-A250 features an optimized control system with a modern detachable display panel, offering intuitive operation, ease of use, and flexible installation. Users can easily monitor and adjust settings directly on the screen.

Additionally, the unit supports Wi-Fi connectivity, allowing remote control via smartphones or smart devices. Users can monitor air quality, adjust airflow, and change operating modes anytime, anywhere. 

Advanced features

The unit offers 4 adjustable fan speed levels, allowing users to tailor airflow according to their needs and space conditions. It also supports automatic fan speed scheduling based on different times of the day, enhancing intelligent operation.

For example, users can set low fan speed at night for quiet operation and higher speed during the day to improve air circulation. This feature helps maintain consistent air quality while saving energy and increasing convenience.

The unit also includes a filter replacement reminder, making it easier for users to perform timely maintenance and ensure optimal filtration performance. Altogether, these features enhance durability, intelligence, and suitability for modern living.

Safety Guidelines for Using the Kosmen KM-A250 Fresh Air System

Proper operation

• Do not block air intake and exhaust vents, as this may disrupt airflow, reduce filtration efficiency, and strain the motor.
• Do not unplug the unit abruptly while operating in heating mode.

Maintenance and filter replacement

• Clean the pre-filter every 3 months.
  Replace the F8 filter every 6 months or the HEPA H13 filter every 12 months.
• Inspect the heat exchanger annually and clean it regularly to maintain heat recovery efficiency at 75–80%.