How Does a Dehumidifier Work ? Their Basic Principle and the Parts of Their Types

Have you been wondering about the working of dehumidifiers? It is a given if you are new to this home appliance here. If that is the case with you then, let’s use this opportunity to learn more about the working of dehumidifiers below. By learning it, you will get to know how this home appliance can help you taking care of the humidity in your home. Let’s just get down to it then and see what we can learn about it. Here we go below then.

The Basic Principle in Dehumidifier Work

Humidity and Condensation in the Home

Humidity and Condensation in the Home

Speaking about the basic principle of dehumidifier, it is basically similar to the condensation happening to a can of cold drink. How can it be so exactly? Do you know why the can is wet after you pick it up from the freezer on hot days? We are sure that you could see how the can has many dews on when you let it alone on the table. This happens because the cool surface meets with the hot air. It then simply cools down because of that.

Thus, it loses the ability to hold the water. Simply put, it has the vapor turned into liquid. That is why the can is wet once put outside the freezer. With this in mind, dehumidifier works pretty much the same. It is only its basic work though. Dehumidifier is designed with all sorts of parts that can put this principle into work. That being said, different types have different parts in their design. Let’s see what they can be and how they work here.

The Parts of the Refrigerant Dehumidifier

Refrigerant dehumidifier is the most common type of all. There are four important parts about this dehumidifier type here. First of all, there is fan and it has the job to pull the air into the dehumidifier. Then, there is compressor behind the fan which will expand and compress the refrigerant coming through the coils in front of the fan. The air that comes into contact with the coils will then begin to cool down. See, the basic is the same, right?

dehumidifier parts - fan compressor and coils

Since the air no longer holds in moisture, you will see the water gathers on the coils. Then, it will drip down to the water reservoir below. This is pretty much how the dehumidifier work goes in refrigerant type. There might be re-heater included as its part as well. If you happen to find this part inside dehumidifier, it will do the job to re heat the air before it is sent back to the room. Moisture free air is cold after all, so re heat is needed.

The Parts of the Desiccant Dehumidifier Type

Other type coming from this home appliance is called desiccant dehumidifier. Need to be known though; this very type we are talking about here works very differently than the refrigerant one. Why, of course, it should be pretty obvious already. It has no part, like cooling coils, fan, compressor, and water reservoir inside it. In fact, it only has desiccant material or silica gel inside to offer. You don’t have to worry about its work, of course.

Desiccant dehumidifiers

Desiccant dehumidifiers vs Compressor illustration

In this dehumidifier type, the silica gel is the one that is responsible to capture the moisture in the air. The air will also be released back to the room without having to be re heated as well. Since this dehumidifier type has no part like the refrigerant, it appears to be small and compact. That is why desiccant dehumidifiers are pretty much effective to be used in smaller spaces in your house. So, it will make best pick for kitchen, closet, and such.


Now that you know the working of dehumidifier already, you should be convinced enough to use it for your own benefit, right? It has range of types and capacities to offer to meet every kind of people’s needs of this appliance. At least, you know that it works promising enough to get you all that moisture in the air that makes your home humid. Dehumidifier is sure to make your home pleasant place to live in. Don’t you think so too?

Tags: #Dehumidifier Parts #Desiccant Dehumidifier Type #How Dehumidifier Work