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Does A Dehumidifier Get Rid Of Damp?

When it comes to dampness, homeowners and commercial property owners look to find various effective solutions, hoping to remove and prevent the odours and unsightly patches it brings. Among the array of remedies, a dehumidifier is a reliable defender of damp, working to extract excess moisture from the air. But a question often occurs when it comes to people considering a dehumidifier as a method of damp prevention and removal: Does a dehumidifier truly get rid of damp? 

Dehumidifiers do not get rid of damp, but they remove excess moisture in the air, preventing the growth of mildew and mould. They can help against dampness, but they will not solve the problem completely. The effectiveness of a dehumidifier against damp depends on various factors.

In this article, we will take a look into the effectiveness of dehumidifiers, the factors to consider to ensure the dehumidifier works effectively and their limitations. 

How Does A Dehumidifier Help Against Dampness?

An effective solution to combat dampness is a dehumidifier. Dehumidifiers work by extracting excess moisture from the air through a process that involves pulling in humid air, passing it over cooled coils where moisture condenses into water droplets, and then collecting the water in a reservoir or draining it away. 

This results in drier air being circulated back into the room, effectively reducing humidity levels.

By lowering humidity levels, dehumidifiers prevent the growth of mould and mildew. This reduction in humidity also helps to prevent damp conditions that can cause damage to furniture, clothing, and structural components of buildings. Dehumidifiers contribute to improving indoor air quality, which can alleviate symptoms associated with dampness such as coughing, sneezing, and congestion.

Investing in a quality dehumidifier can make a noticeable difference in maintaining and protecting a dry, comfortable, and healthy indoor environment.

The Benefits of Dehumidifiers Against Damp

Dehumidifiers are a very popular method of preventing damp and mould growth in residential and commercial properties. Their benefits are extremely helpful in situations relating to damp prevention and excess moisture removal. The benefits are:

Reduced Humidity Levels: Dehumidifiers effectively extract excess moisture from the air, creating a drier environment and combating musty odours.

Prevention of Mould and Mildew Growth: By preventing the growth of mould and mildew, dehumidifiers help maintain a healthier living space and prevent structural damage to buildings.

Preservation of Property: Dehumidifiers contribute to preserving the integrity of buildings and furnishings by mitigating the harmful effects of moisture, such as corrosion, warping, and deterioration.

Improved Indoor Air Quality: By reducing the presence of mould spores, dust mites, and other allergens, dehumidifiers help create a healthier living environment and alleviate respiratory problems and allergies.

Versatility and Convenience: With a wide range of models available for different needs and spaces, dehumidifiers offer a versatile and convenient solution for addressing dampness issues in various indoor environments.

Minimal Maintenance: Dehumidifiers are easy to use and require minimal maintenance, making them a hassle-free solution for maintaining optimal humidity levels.

The Factors That Effect Dehumidifier Performance Against Damp

Several factors can significantly impact the performance of a dehumidifier in combating dampness. Understanding these factors is crucial for ensuring maximum effectiveness.

Size and Capacity

The size and capacity of a dehumidifier will play a vital role in its performance. Choosing a dehumidifier with the appropriate capacity for the size of the space is essential. A unit that is too small may struggle to adequately remove moisture, while an oversized unit may cycle on and off frequently, leading to inefficient operation.

Relative Humidity Levels

The initial humidity levels in the environment also affect the performance of a dehumidifier. Higher humidity levels require more energy and time for the dehumidifier to achieve the desired reduction in moisture. Monitoring and adjusting the dehumidifier settings based on current humidity levels can help optimise its performance.


Dehumidifiers operate less efficiently in colder temperatures. The ability of air to hold moisture decreases as temperature drops, which can reduce the effectiveness of the dehumidification process. Some dehumidifiers are equipped with features such as defrost cycles to address this issue and maintain optimal performance in colder environments.

Air Circulation

Proper air circulation within the space is essential for the efficient operation of a dehumidifier. Poor airflow can hinder the distribution of dry air and result in uneven dehumidification. Positioning the dehumidifier in a central location and ensuring unobstructed airflow around the unit can help improve its performance.


Regular maintenance is critical for ensuring the continued effectiveness of a dehumidifier. Cleaning or replacing filters, emptying water reservoirs, and inspecting coils for debris buildup are essential tasks to keep the unit operating efficiently. Neglecting maintenance can lead to reduced performance and potential damage to the appliance. If you are renting or hiring, most providers will do this before you receive the dehumidifier.

Environmental Conditions

External factors such as weather conditions and indoor activities can also impact dehumidifier performance. For example, rainy weather may increase humidity levels indoors, requiring the dehumidifier to work harder to maintain optimal conditions. Similarly, activities that generate moisture, such as cooking or showering, can affect the effectiveness of the appliance.

The Limitations of Dehumidifiers Against Damp

While dehumidifiers are helpful tools for preventing dampness in indoor environments, they are not without limitations, and overall more effective methods of damp proofing may have to be considered. One significant limitation is their inability to address the root causes of dampness. Although dehumidifiers excel at extracting moisture from the air, they do not rectify underlying issues such as poor ventilation, water leaks, or structural deficiencies. 

Consequently, while a dehumidifier may temporarily alleviate symptoms of dampness by reducing humidity levels, it cannot provide a long-term solution if these root causes remain unaddressed. Therefore, relying solely on a dehumidifier to combat dampness will only offer temporary relief without resolving the fundamental problems.

Another limitation is the effectiveness is dependent upon various factors, meaning not every home or situation will be the same. Using a dehumidifier that is undersized for a given area may result in inadequate moisture removal, while an oversized unit may lead to unnecessary energy consumption and inefficient operation. 

Additionally, while dehumidifiers are effective at controlling moisture levels within their designed capacity, they may struggle to maintain the desired humidity levels in larger or more challenging environments. In such cases, having multiple units or carrying out moisture control measures may be necessary.


In conclusion, dehumidifiers are a great tool to assist in the prevention of dampness, but not to remove it. Their ability to reduce humidity levels, prevent mould growth, preserve properties, and improve indoor air quality makes them invaluable assets for maintaining a healthy and comfortable living environment. With their versatility, convenience, and minimal maintenance requirements, dehumidifiers offer a comprehensive solution to moisture-related issues in various indoor settings. By investing in a quality dehumidifier and implementing proper damp proofing measures, individuals can combat dampness effectively.

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