Struggling with damp walls? The right dehumidifier can make all the difference in creating a moisture-free, comfortable home. With countless options available, choosing the best one can feel overwhelming. Don’t worry—we’ve done the hard work for you!

This guide highlights the top dehumidifiers for damp walls, focusing on efficiency, performance, and ease of use. After hours of testing, we’ve identified the most reliable options.

The Devola 12L/Day Low Energy Dehumidifier is our Editor’s Pick for its outstanding performance, energy-saving design, and laundry-drying mode. For larger spaces, The Honeywell 20L/Day Dehumidifier stands out with powerful moisture removal and user-friendly features.

Need something affordable? The Russell Hobbs RHDH1001 10L Dehumidifier delivers excellent value for medium-sized areas. We’ve also flagged one to avoid—the CAIKEZI Dehumidifier—for its poor performance, so you don’t waste your money.

Whether you’re dealing with severe dampness or just need a little extra help, there’s a perfect option for you in this guide. Ready to tackle damp walls and reclaim your home’s comfort? Read on to discover the best dehumidifiers and take control of moisture today!

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Key Features to Expect from Your Ideal Dehumidifier

When buying the best dehumidifier for damp walls, there are certain features and qualities that should be considered non-negotiable. These “givens” ensure the dehumidifier is effective, reliable, and user-friendly:

Features That Should Be a Given

1. Moisture Removal Capacity: Look for models with adequate extraction rates (e.g., 10-20 litres/day) based on the size of your space.
2. Adjustable Humidity Control: An adjustable humidistat (30-80% or wider range) to maintain ideal indoor humidity.
3. Energy Efficiency: Low energy consumption is key for long-term affordability; models with energy-saving modes are preferable.
4. Noise Levels: Quiet operation, ideally below 40dB, is essential for use in living spaces or bedrooms.
5. Ease of Maintenance: A removable, easy-to-clean water tank with a "full tank" indicator and continuous drainage options.
6. Portability: Castors and carry handles for convenient movement between rooms.

Design and Build Quality

A dehumidifier's design and build quality are critical for ensuring durability and ease of use. Consider the following:

1. Compact Design: A space-saving design that blends seamlessly into your home without being bulky or obtrusive.
2. Robust Materials: High-quality plastic or metal housing ensures the unit withstands regular use.
3. Ergonomic Features: Handles, wheels, and intuitive controls should be well-integrated for convenience.
4. Stable Base: A sturdy base to prevent tipping, especially in households with pets or children.
5. Water Tank Design: A spill-proof, easy-to-remove tank with a secure lid and handle.

Extra Features to Look Out For

Premium dehumidifiers often include additional features that enhance functionality and convenience. While not strictly necessary, they can add significant value:

1. Laundry Drying Mode: Speeds up indoor clothes drying and eliminates damp odours.
2. Auto Defrost: Ensures the unit works efficiently in cooler temperatures without freezing up.
3. Timer Settings: Allows you to set operation times, improving energy efficiency and convenience.
4. Intelligent Functions: Wireless connectivity enables remote monitoring and control through dedicated smartphone applications.
5. Air Purification: Integrated HEPA or charcoal filters for improved air quality.
6. Refrigerant Type: Eco-friendly refrigerants like R290 are better for the environment.
7. Child Lock: Prevents accidental adjustments or tampering.

By keeping these categories in mind—baseline expectations, design/build quality, and extra features—you can confidently select the best dehumidifier for your needs, ensuring your damp walls are a thing of the past.

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Editors Pick

Devola 12L/day Low Energy Compressor Dehumidifier

We evaluated the Devola 12L/day Low Energy Dehumidifier and discovered it to be a reliable and adaptable option for effectively controlling indoor humidity levels.

Key Features

• Energy Efficiency: Costs just 5p per hour to run (based on 24p/kWh), making it economical for daily use.
• Quiet Operation: At 36dB, it operates quietly and is suitable for living spaces.
• Laundry Drying Mode: Effectively dries clothes, reducing drying time and odours.
• Humidity Control: Adjustable humidistat (30-80%) automatically maintains the desired humidity level.
• Easy Maintenance: Includes a 2L water tank with a handle or continuous drainage for convenience.
• Mobility: Equipped with castors and a carry handle for easy movement between rooms.

We assessed the Devola 12L/day Low Energy Dehumidifier and found it to be a dependable and effective choice for controlling indoor moisture. Its energy efficiency (just 5p per hour to run) and quiet operation (36dB) make it perfect for daily use in living spaces.

The laundry drying mode was particularly impressive, effectively drying clothes overnight and eliminating damp odours. The adjustable humidistat maintained ideal humidity levels effortlessly, and the mobility features (castors and carry handle) allowed easy room-to-room use.

While the 2L water tank works well, it requires careful handling to avoid spills during emptying—a minor drawback offset by the continuous drainage option.

Overall, this dehumidifier stands out for its practicality, performance, and versatility, offering excellent value for reducing moisture and improving indoor comfort. It’s a smart choice for any home needing a dependable, energy-efficient dehumidification solution.

Runner Up

Honeywell 20L/Day Dehumidifiers For Home With Digital Display

The Honeywell 20L/Day Dehumidifier is a highly efficient and versatile solution for managing indoor humidity and addressing dampness in larger spaces. Designed for performance and ease of use, it’s packed with features to enhance your home environment while keeping energy consumption low.

Key Features

• Powerful Moisture Removal: Extracts up to 20 litres of moisture daily, perfect for larger spaces with persistent damp issues.
• Digital Display & Humidity Control: Adjustable settings (30-90%) and intelligent comfort mode offer hassle-free operation.
• Energy Efficient: An ultra-efficient compressor, 24-hour timer, and auto shut-off minimise energy use.
• Laundry Mode: Dries clothes efficiently, reducing reliance on tumble dryers.
• Quiet Operation: Operates quietly at 40dB, reaching 44dB in laundry mode.
• Convenient Design: A 3.4L tank with continuous drainage and portable wheels ensures easy use.
• Eco-Friendly: Utilises R290 refrigerant for an environmentally safe design.

We tested the Honeywell 20L/Day Dehumidifier and found it to be an exceptional addition to any home. The digital controls and intelligent comfort mode made adjusting humidity levels simple, providing consistent and hassle-free results.

One of the standout features is the laundry mode, which dries clothes efficiently, saving time and energy while eliminating the need for a tumble dryer.

The unit operates quietly (as low as 40dB), even during prolonged use, and the 3.4L water tank with a continuous drainage option makes maintenance incredibly convenient. Its compact, portable design with castor wheels added to its overall practicality.

A small downside is that the water tray can be tricky to slide in smoothly, but this minor inconvenience doesn’t overshadow the unit’s remarkable performance.

Overall, we highly recommend the Honeywell 20L/Day Dehumidifier for anyone seeking an efficient, reliable, and user-friendly solution to dampness and humidity control.

Budget Pick

Russell Hobbs RHDH1001 10 Litre/Day Dehumidifier for Damp

The Russell Hobbs RHDH1001 10L Dehumidifier is an efficient and well-designed solution for managing humidity and dampness in medium-sized spaces up to 30m². We’ve found it particularly useful for reducing condensation and drying laundry during colder months.

Key Features

• 10L Maximum Extraction Rate: Removes up to 10 litres of water per day, ideal for keeping the air dry and comfortable.
• 2L Water Tank: Includes a water full alarm to prevent overflows. For added convenience, the continuous drain option allows direct drainage.
• LED Display and Electronic Controls: Simple to use with clear settings for timer, humidity levels, and operating modes.
• Auto Defrost and Restart: Ensures uninterrupted operation, even in cooler conditions.
• Compact Design with Wheels and Handle: Easy to move around, despite its weight.

We tested the Russell Hobbs RHDH1001 10L Dehumidifier in a utility room and were impressed by its excellent performance in reducing condensation and drying clothes indoors.

The adjustable humidity levels and timer feature made it easy to customise for our needs, and the auto defrost ensured consistent operation, even in cooler conditions.

Its robust build (including castors and a handle) makes it simple to move, and the water tank is easy to empty. The continuous drain option adds extra convenience for those who prefer less maintenance.

However, the “silent” mode, while quieter, is not entirely silent, which may be noticeable in bedrooms or living spaces. Despite this, the dehumidifier’s overall efficiency and reliability outweigh the minor drawback.

If you’re looking for a durable, easy-to-use solution for dampness, the Russell Hobbs 10L Dehumidifier is a fantastic choice, especially for medium-sized spaces. It’s a versatile and worthwhile addition to any home.

Energy Efficient Dehumidifier Pick

Ometa Pure 12L/Day Dehumidifier for Damp, Condensation, Mould & Mildew

The Ometa Pure 12L Dehumidifier is an efficient and user-friendly solution for managing dampness, condensation, and excess moisture in your home. Its compact design and powerful performance make it ideal for creating a fresher, healthier living space.

Key Features

• Moisture Absorption: Extracts up to 12 litres daily, efficiently reducing dampness, mould, and mildew.
• Quiet Operation: Runs quietly, even on high settings, with a sleep mode for undisturbed rest.
• Adjustable Settings: Two fan speeds and a 3-color humidity indicator simplify monitoring and control.
• Drainage Options: Includes a 2L tank with full-tank alerts or continuous drainage using a hose.
• Portable Design: Castor wheels make it easy to move between rooms.
• Child Lock: Ensures safe use around kids and pets.
• Laundry Drying Mode: Accelerates clothes drying, ideal for colder or wet conditions.

We tested the Ometa Pure 12L Dehumidifier and found it a standout performer. It worked wonders in reducing dampness, making our rooms fresher and more comfortable. The laundry drying mode was impressive, significantly reducing drying time (a lifesaver during wet or cold weather).

The energy-saving timer and sleep mode were also highlights, providing quiet, efficient operation without needing constant attention. Its castor wheels made moving it between spaces effortless, and the child lock added peace of mind for families.

The only minor downside was the power cable, which could be longer. However, this slight inconvenience didn’t detract from the overall experience.

In our opinion, the Ometa Pure 12L Dehumidifier is a practical, reliable, and user-friendly solution for managing moisture. Whether for damp control or faster laundry drying, this compact unit is an excellent addition to any home. It truly delivers on performance and convenience.

Quietest Dehumidifier for Damp Walls Pick

NETTA 20L/Day Low Energy Dehumidifier

We tested the NETTA 20L/Day Low Energy Dehumidifier and found it to be a highly effective device for managing humidity in the home. Its performance, ease of use, and energy efficiency stood out during our use.

Key Features We Liked:

• Energy Efficiency: With a power usage of just 345W, you can run this dehumidifier for less than 8p per hour. It’s a cost-effective way to combat dampness without worrying about high energy bills.
• Adjustable Humidity Control: The digital control screen allows you to set humidity levels between 30-80%, ensuring tailored performance for different needs.
• Versatile Modes: Equipped with two fan speeds, two operating modes, and a 24-hour timer, it adapts to various situations with ease.
• Continuous Use Options: The included continuous drain pipe makes it suitable for prolonged use without needing frequent emptying.

We tested the NETTA 20L/Day Low Energy Dehumidifier and found it to be a game-changer for tackling humidity issues. It efficiently removes moisture, reduces dampness, and prevents mould growth (a must for a healthier home).

The automatic shut-off and defrost features made it incredibly safe and reliable for continuous use.

We loved its mobility—thanks to the castor wheels and sturdy handle, moving it between rooms was hassle-free. It also noticeably improved the air quality, making the atmosphere feel fresher and less musty. Plus, it’s surprisingly quiet, perfect for living spaces where noise could be disruptive.

That said, the drainage hose is quite short (an extension may be needed), and the unit is slightly heavy. However, these are minor drawbacks compared to its overall performance.

With its energy efficiency, versatile features, and robust moisture control, this dehumidifier is a fantastic addition to any home, offering exceptional value and reliability.

One To Avoid

CAIKEZI Dehumidifiers for Home with Auto Defrost Function

We tested the CAIKEZI dehumidifier and found it underwhelming in most key areas. While its compact design and low-noise sleep mode are positives (ideal for small bedrooms or closets), it falls short where it matters most—moisture removal.

Despite its sleek look and features like auto-defrost and a colourful night light, the performance left much to be desired. It struggles in larger spaces and doesn’t handle heavy humidity well.

Even in optimal conditions (temperature above 30°C and humidity over 80%), the dehumidification rate is disappointingly slow. The 2200ml tank rarely needs emptying, not because of its capacity but due to the minimal water it collects.

Its efficiency in drying clothes or handling condensation on windows is poor, and the high-pitched sound in some modes detracts from its quiet operation claim.

For light, occasional use in very specific conditions, this unit might suffice. However, if you need a reliable, effective solution for reducing moisture or drying damp areas, this isn’t it. There are better options available at this price point that deliver far superior results.

Unfortunately, we can’t recommend it for most users.

How We Tested and Chose the Best Dehumidifiers for Damp Walls

Testing dehumidifiers for damp walls required a detailed and systematic approach to evaluate their performance, usability, and overall value. We left no stone unturned to ensure we covered every factor that contributes to a high-quality, effective dehumidifier. Here’s how we did it:

Setup and Installation

We started by assessing how simple each dehumidifier was to set up, from unboxing to starting operation. This included evaluating the clarity of the instructions and the intuitiveness of the controls.

Mobility was another key factor—we tested whether castors and handles made it easy to move the dehumidifier between rooms, especially in larger spaces or homes with multiple floors.

Performance Testing

Performance was measured under controlled conditions with a high humidity level (around 80%) to evaluate how much moisture each unit could extract over a 24-hour period. We tested the dehumidifiers in rooms with damp walls, monitoring changes in air quality and wall dryness over several days.

The coverage area was verified to ensure the units met their advertised capabilities. To maintain accuracy, we used a hygrometer to check if the adjustable humidistat consistently kept the humidity level within the desired range.

Energy Efficiency

Energy consumption was a crucial factor, so we used kilowatt-hour measurements to determine operational costs for daily use. Special focus was placed on energy-saving modes, such as eco-settings, to see how they balanced performance and cost.

This ensured we could identify models that are both effective and economical to run over time.

Noise Levels

Using a decibel meter, we measured the sound levels of each dehumidifier during standard operation and in quieter modes. Noise levels were evaluated in various settings, including bedrooms and living rooms, to ensure they wouldn’t disrupt daily life or restful sleep.

Models with consistently low noise output scored higher in this category.

Water Tank Design and Maintenance

Water tank capacity and ease of use were carefully evaluated. We tested how quickly tanks filled in high-humidity environments and checked whether they were easy to remove, empty, and reinsert without spills.

Continuous drainage options, where available, were also tested to determine their practicality for reducing maintenance needs.

Additional Features

We explored the value of extra features that enhance convenience and performance. This included testing laundry-drying modes to see how effectively they dried clothes in enclosed spaces, as well as evaluating auto-defrost functionality to prevent freezing in colder conditions.

Timer settings were reviewed for accuracy and ease of scheduling. For smart-enabled models, we assessed app connectivity, ease of monitoring, and the ability to control the unit remotely.

Durability and Build Quality

The materials used in the dehumidifiers, including the housing and internal components, were checked for durability and resistance to wear. Stability during operation was tested to ensure the units remained upright even on uneven surfaces.

To simulate long-term use, we ran the dehumidifiers continuously for several days to observe any potential overheating, wear, or performance issues.

Environmental Impact

Environmental considerations were also part of our evaluation. We prioritised models using eco-friendly refrigerants, such as R290 and looked for manufacturers that incorporate sustainable materials or support recycling programs. Units with lower environmental footprints were given extra credit.

User Experience

We focused on how user-friendly each dehumidifier was, examining the design and clarity of controls, display screens, and overall interface. Feedback on maintenance ease, such as filter cleaning, was gathered to determine how manageable the units were over time.

A smooth and hassle-free user experience was essential for top-ranking models.

Value for Money

Finally, we compared the performance, features, and durability of each dehumidifier against its price point. Models offering a strong balance between affordability and premium features scored the highest, ensuring that users get excellent value for their investment.

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Frequently Asked Questions

Is It Safe to Run a Dehumidifier Overnight?

Yes, it is safe to run a dehumidifier overnight. Most modern dehumidifiers are designed with safety features like auto-shutoff when the water tank is full.

Running it overnight can help maintain consistent humidity levels, but ensure the device is well-maintained and operated in a ventilated area for optimal safety.

How Long Does a Dehumidifier Take to Dry a Damp Room?

The time a dehumidifier takes to dry a damp room depends on the room size, humidity level, and the unit’s capacity. Typically, it can take anywhere from a few hours to a full day to notice significant improvements. Larger spaces or higher humidity levels may require extended operation.

Can Mould Be Killed by a Dehumidifier?

A dehumidifier cannot kill mould directly but can help prevent its growth by reducing humidity levels. Mould thrives in damp environments, so maintaining a humidity level below 50% can inhibit its spread. For existing mould, physical removal and cleaning are necessary in addition to using a dehumidifier.

Can a Dehumidifier Damage Your House?

A dehumidifier, when used properly, is unlikely to damage your house. However, improper usage, such as setting the humidity too low, can over-dry materials like wood, causing cracks or shrinkage. Regular maintenance and monitoring ensure the unit operates effectively without causing unintended harm.

Is a Dehumidifier or Air Purifier Better for Dampness?

A dehumidifier is better for dampness as it removes excess moisture from the air, addressing the root cause of damp conditions. An air purifier is designed to filter airborne particles and allergens but does not reduce humidity, making it less effective for tackling dampness.

Do I Need to Open Up Windows When Using a Dehumidifier?

No, you do not need to open windows when using a dehumidifier. Keeping windows closed allows the device to work more efficiently by focusing on the moisture inside the room. Opening windows may introduce additional humidity, reducing the dehumidifier’s effectiveness.

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Final Word

We hope our guide to the best dehumidifier for damp walls has helped you find the right option for your home. With so many excellent models, it’s not an easy choice, but we’ve highlighted the top performers.

The Devola 12L/Day Low Energy Dehumidifier is our top pick for its impressive performance, energy efficiency, and versatile features like a laundry-drying mode. For larger spaces, the Honeywell 20L/Day Dehumidifier offers powerful moisture removal and a user-friendly design.

On a budget? The Russell Hobbs RHDH1001 10L Dehumidifier is a great value for medium-sized rooms. Not every option impressed us, though. The CAIKEZI Dehumidifier underperformed, struggling with moisture removal and failing to meet expectations, even in optimal conditions.

Are you ready to tackle damp walls or need more time to decide? Share your thoughts in the comments—we’d love to hear from you!