1. Check the usage area
Firstly, estimate the corresponding dehumidification capacity based on the main room area of the required dehumidifier. Normally, we can roughly calculate the selected amount based on the environmental conditions, for example: 1.2 (air density) * 300 (volume) * 0.005 (water content before and after dehumidification) * 1.2 (safety factor). In addition, the detailed parameters of the dehumidifier also refer to the usage area. Of course, it must be based on the actual situation of the specific space used, such as the layout of the space, degree of openness, solar radiation intensity, ventilation, number of people, and so on. If the space used is connected to other places or exposed to strong light, a dehumidifier with a larger cooling capacity should be purchased appropriately. Of course, a typical household dehumidifier can dehumidify each room sequentially, so you can purchase it in the largest space you need, such as a living room or bedroom.
In short, dehumidification capacity refers to how many liters of water a machine can extract per day. The indicated dehumidification capacity of the dehumidifier is, for example, 18L/D, which means that if the machine operates 24 hours a day, it can pump 18L of water. Of course, the prerequisite is in a standard environment, that is, when the ambient temperature is 30 degree C and the humidity is 80%. The following is a summary of the dehumidification capacity and power of dehumidifiers corresponding to the room area.
2. Check the usage location

3. View price budget
The difference between the compressor and humidity sensor module of the dehumidifier can lead to price differences. Good compressors are usually Daikin, Mitsubishi, and Panasonic. A better humidity sensor module is Shinei, Hokuriku, and others from Japan. If the budget is sufficient, it is best to choose a high-quality compressor and humidity sensor module, which not only has a long service life but also more precise humidity control.
4. Look at other functions
In addition to its main functions, some dehumidifiers will also have other functions, such as negative ions, ozone, dust removal, etc. We purchase them as needed. This feature does not need to be comprehensive, but should have specificity. For those who are more sensitive to noise, if you want to use a dehumidifier in the bedroom for 24 hours, it is best to choose an ultra quiet machine. For those who are sensitive to air, you can choose dehumidification with anionic or dust removal functions