What is a Dehumidifier? Operation, Advantages and Disadvantages 


What is a Dehumidifier?

A dehumidifier is an electric machine that extracts moisture from the air to lower humidity. Humidity refers to the number of water droplets present in the air. It can be either a vapour or a liquid. Humidity levels are affected by how damp the environment is.

It’s responsible for the “sticky” sensation during hot tropical months. It can be seen when you cook on the stovetop, as water droplets run down your walls. Also, condensation on windows can signal that there is too much moisture.

There is a correlation between high indoor humidity and food and health spoilage. Although it may seem more incredible, the humidity doesn’t decrease.

Three easy steps to use a dehumidifier

This step-by-step guide will show you how to use a humidifier to eliminate mould and excess humidity in your home.

Step 1: How to choose best position for dehumidifier

First, it is essential to note that the best place to put a dehumidifier in a room is in the middle. Because of this, the unit can now receive fresh air. Do not alter the positioning if an air discharge is at the team’s top. After that, you can lean it against a wall.

While the dehumidifier operates, make sure all windows and doors are shut. To maximize the effectiveness of the dehumidifier, you should place it near the source of moisture if you have to use it in large spaces. Avoid placing too close to objects such as tables.

Check the surrounding area for dust and dirt. It is essential for construction and manufacturing sites, where dust particles are often produced. These materials can impact the unit’s effectiveness.

Step 2: Operating and selecting the correct settings

Keep the humidity levels in your house between 30 and 50 percent. If these levels fall below the threshold, your home could suffer extreme dryness. However, bacteria can thrive if they are higher than this range.

Hygrometers and control panel LED screens can measure humidity. When the humidity drops, manual dehumidifiers may turn to lower settings. An automatic dehumidifier with energy-saving settings can be set to the highest, switching to its most efficient location when the humidity drops.

Some units have auto-adjust settings which change with temperature or humidity. To keep the team on track, they may additionally feature a timer.

Step 3: Doors and windows must be close to use the dehumidifier

The humidity from the outside will continue to penetrate the room. Even though the dehumidifier has been turning on for several days. If the doors and windows aren’t closed, it won’t work. It is advisable to shut all doors and windows in the room before the machine starts.

Step 4: Empty the water tank and clean the filter

If your dehumidifier features continuous drainage, you can attach the hose to it according to the instructions manual. For gravity-driven systems, you should run the hose downwards; for motorized systems, it should be up. Verify that there are no twists or kinks in the hose.

If water isn’t flowing correctly through the hose, you can force it down by making a small opening about 30cm from the dehumidifier. Regularly maintain the dehumidifiers to function properly. The unit will perform better if it is properly maintained and allowed to dehumidify the air. Do not forget to:

  • Clean your filters every six months to prevent dirt and other particles from building up.
  • Make sure to clean the unit’s exterior, including around the intake vents and exit vents.
  • Check that the water reservoir is regularly empty
  • Check that your coils work properly

How Does a Dehumidifier Work?

Refrigeration is the most popular type of dehumidifier. They are dehumidifying by lowering the temperature of muggy air. Then, it heats the dried air again to achieve the desired temperature before releasing it into space.

Desiccant-based dehumidification systems use a material that absorbs water from the air. These systems are rarer as the desiccant material eventually becomes contaminated and is discarded. High temperatures require to absorption of moisture in most desiccant materials. They also need more energy than dehumidifiers that use condensation.

Disadvantages of dehumidifiers


You can get a dehumidifier for the same price as a window air conditioner. The only real distinction is that this device is entirely house within, rather than partially outside.. The noise level is similar to that of a window air conditioner.

Regular Maintenance

It is necessary to maintain the dehumidifier and empty the tank regularly. Sometimes it takes longer for the tank’s to fill up. The water in the tank can contaminate with bacteria and mould. It means that you must keep the tank empty even if there isn’t enough humidity to indicate that it is complete.

High energy use

A dehumidifier will affect your energy bill. The energy needs of a dehumidifier are far higher than those of a typical refrigerator. Comparing the energy used by a dehumidifier to an HVAC unit running at full speed to combat humidity, it is likely that the additional point that a humidifier uses is worth it.

Advantages of dehumidifiers

Helps Those With Respiratory Issues

Dehumidifiers may help asthma patients. Asthma patients may find it difficult to breathe because the air is heavy due to moisture in the atmosphere. People with asthma will find it easier to live because the dehumidifiers remove water from the air.

Dehumidifiers Offer Relief From Allergies Or Respiratory Illness

People with allergies and respiratory illnesses will likely see the most significant health benefits from a dehumidifier. Any environment with humidity above 50% is ideal for mould, allergens and mildew to thrive.

Limits Water Leakage Damage

If you live in areas susceptible to flooding, a dehumidifier can be a great help. Many dehumidifiers also use as vacuum cleaners to remove excess water. They can also prevent mold and mildew growth, which helps to reduce the effects of flooding.

Keeps Your House Odor Free

Monsoons can bring a musty, unpleasant odor in your laundry area and elsewhere in your home. Dehumidifiers also prevent this, which absorb excess water from your living area.


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