During the rainy season, the humidity in warehouses surges, paper packaging boxes start to become soft, and electronic components 

are under threat - can a suitable commercial dehumidifier be your savior?

In industrial production and business operations, controlling environmental humidity is of utmost importance. Excessive humidity not 

only causes product damage, equipment corrosion, but also breeds mold, affecting the safety of the working environment and the 

health of employees.

Commercial dehumidifiers, with their powerful dehumidification capabilities (typically 50L - 960L per day) and long-lasting operational 

stability, serve as the moisture protection for large spaces such as warehouses, workshops, and archives. 

01 Dehumidification Principle, The Debate Between Refrigeration and Rotating Wheel Technology

Commercial dehumidifiers mainly employ two dehumidification principles: refrigeration dehumidification and desiccant dehumidification.

Refrigeration dehumidification is the most common technical approach. It uses the refrigeration effect of the compressor to cool the humid 

air, causing it to condense into water. The collected water is then stored in a water tank or discharged through a drainage pipe, while the 

dry air is reintroduced into the environment.

This method performs exceptionally well in high-temperature and high-humidity environments and is the preferred solution for most 

industrial workshops. 

The desiccant dehumidification system adopts a different technical approach. It uses a rotating wheel of moisture-absorbing materials 

(such as silica gel or molecular sieves) to adsorb moisture, and then releases the moisture through the heating regeneration zone.

This method is more suitable for low-temperature and low-humidity environments, such as drug storage areas and precision instrument 

rooms, where strict humidity requirements are imposed. 

02 Analysis of Advantages and Disadvantages, Clearly Defining Requirements to Avoid Pitfalls

Both refrigeration-type and rotary-type dehumidifiers have their applicable scenarios and limitations.

The advantages of refrigeration dehumidifiers are quite prominent: high dehumidification efficiency, relatively low energy consumption, 

mature technology, and low cost. However, their disadvantage is that the evaporator is prone to frosting in low-temperature environments 

(usually below 5℃), requiring frequent defrosting, which affects efficiency. 

The advantage of the desiccant dehumidifier lies in its ability to operate stably in low-temperature environments and to achieve extremely 

low humidity levels (as low as 10% RH). The disadvantage is that it has higher energy consumption because it requires heating for the 

regeneration area. Additionally, its purchase cost is usually higher than that of the refrigeration type dehumidifier. 

03 Application Scenarios, Humidity Solutions in Diverse Environments

The application scope of commercial dehumidifiers is extremely wide, covering almost all commercial and industrial scenarios where 

humidity control is required.

In manufacturing environments, electronics factories prevent components from getting damp, food processing plants extend product 

shelf life, and textile factories prevent mold and static electricity. All of these cannot be done without dehumidifiers.

In the field of warehousing and logistics, archives rooms, libraries, and cold chain logistics centers all require stable humidity control 

to ensure product quality.

Special environments such as underground engineering (tunnels, subways), ship engine rooms, and places for protecting precision 

instruments from moisture, have even more stringent requirements for dehumidifiers. 

04 How to Choose: Five Key Factors Determine Dehumidification Effect

When choosing a suitable commercial dehumidifier, several factors need to be considered. The following five aspects are particularly crucial:

Dehumidification capacity is the most critical parameter. The dehumidification capacity of large commercial dehumidifiers typically 

ranges from 50L to 960L per day, and it needs to be selected based on the size of the space and the initial humidity. The general calculation 

formula is: Dehumidification capacity (L/day) = Space volume (m³) × Target humidity difference × Coefficient (usually 0.3).

The usage area is closely related to the floor height. When choosing, it is necessary to comprehensively consider the floor height, initial 

humidity, and target humidity value. A 960L/day large industrial dehumidifier can cover a space of 1000-1300 square meters 

(with a floor height of 2.6 meters).

The working temperature range directly affects the dehumidification effect. Ordinary refrigeration dehumidifiers usually operate in a 

temperature range of 5-38℃. If it is necessary to use in a low-temperature environment, a low-temperature-resistant model or a desiccant

dehumidifier should be selected.

The intelligent control system can significantly enhance the user experience. High-precision digital humidity meters can achieve fully 

automatic control, with a humidity adjustment range of 1%. Advanced models also support remote monitoring via the Internet, enabling 

real-time humidity data tracking and automatic adjustment.

Durability and protection level cannot be ignored. Industrial-grade materials and dust-proof and moisture-proof designs can adapt to 

harsh environments. In humid or dusty environments, a model with a protection level of IP54 or above should be selected. For chemical 

scenarios, explosion-proof models are required. 

05 Practical Case: The Humidity Control Journey of a Paper Mill

A large paper mill once suffered from the limitations of its traditional dehumidifiers - the fluctuation of the moisture content of the raw 

paper led to the generation of several tons of deformed waste paper per hour, resulting in heavy losses.

The fluctuation of the humidity in the workshop directly affected the shrinkage rate of the paper, causing unstable product dimensions 

and a high rate of customer complaints.

After introducing an industrial temperature control dehumidification system with a daily dehumidification capacity of 168 liters, the 

humidity in the workshop was stabilized and controlled within the ideal range of 55 ± 3% RH.

The results were immediate: the shrinkage rate of the paper was reduced to below 0.02%, the product qualification rate significantly 

improved, and the annual waste loss due to humidity issues was reduced by hundreds of tons.

This system adopted a multi-stage compression refrigeration mechanism and a spiral heat exchanger, increasing the dehumidification 

efficiency by 40%, and the intelligent defrosting algorithm ensured that the equipment could operate stably in low-temperature environments. 

06 Maintenance and Care: The Key to Extending Equipment Lifespan

Proper maintenance can significantly extend the lifespan and efficiency of dehumidifiers.

Regular cleaning is the basic task. The filter should be cleaned weekly to prevent blockage and affect efficiency; the condenser should 

be dusted monthly to avoid poor heat dissipation and prevent malfunctions.

Water quality treatment is often overlooked. The water tank needs to be disinfected regularly to prevent bacterial growth. It is recommended to

combine with a drainage pipe to achieve automatic drainage to avoid water accumulation in the tank and bacterial growth.

Sensor calibration is related to the accuracy of humidity control. The humidity sensor should be calibrated once a year to ensure the accuracy 

of measurement data and maintain the dehumidification effect.

A large paper mill once had problems due to the insufficient capacity of traditional dehumidifiers, generating several tons of deformed 

waste every hour.

After introducing an industrial dehumidification system with a daily dehumidification capacity of 168 liters, the humidity in the workshop 

was stabilized at 55 ± 3% RH, and the paper shrinkage rate dropped below 0.02%. Annual losses were reduced by several million yuan.

Seeing the goods in the warehouse remain dry and the production line no longer being disturbed by moisture, the factory manager finally 

breathed a sigh of relief: "The humidity is stable, and the quality and output of the products have been guaranteed."