The necessity of cleaning the filter of fan coil unit

As the terminal equipment of central air conditioning in water systems, regular maintenance and upkeep of fan coil units are necessary to maintain their excellent working condition and efficiency. If the fan coil unit is not maintained and cleaned for a long time, the accumulation of dust on the fins will significantly reduce the heat transfer efficiency, and it is also easy to breed bacteria, emit odors, and affect indoor air quality. In the cleaning process, the cleaning of the filter screen is particularly important.

The filter is the first interception, and after the accumulation of dust, flocs (kitchen style and oil fume), the return air is blocked and the air volume decreases significantly; Cold/hot air cannot fully flow through the surface cooler, resulting in a reduced output of the unit. With the same set temperature, the cooling and heating processes become slower. 

Excessive accumulation of dust on the filter screen can lead to poor return air flow, increased fan load, continuous high load operation of the motor, and increased power consumption; Long term holding of air can easily cause motor overheating and shorten its lifespan. DC brushless motors can also be affected, and kitchen models are more prone to jamming when oil stains adhere.

The filter screen of the fan coil unit can block dust and oil fumes, preventing oil and dust from directly sticking to the fins, wind turbine, and water receiving tray. Once the fins and rotor accumulate oil and dust, it becomes much more difficult to clean them later, and the solidified oil stains are difficult to clean. In severe cases, it can directly lead to the scrapping of the fan coil unit.

Dirty filter screens are prone to the growth of mold and bacteria when they become damp, which can blow spores and odors into the room during air supply; The mixture of oil stains and condensed water in kitchen fan coil units can also produce an oil odor, affecting indoor air quality.

A large amount of impurities passing through the filter screen and falling onto the water tray will mix with condensed water mucus, blocking the condensate drainage pipe. If the drainage is not smooth, it will overflow, causing water leakage and mold growth in the ceiling. This risk is even higher for kitchen models.

Regular cleaning of the filter screen is a low-cost daily maintenance; If left unchecked, subsequent deep cleaning of fins, dredging of drainage pipes, and replacement of wind turbines will result in much higher maintenance costs.