What Is The Best Desiccant Dehumidifier? Top 7 Options Reviewed

A desiccant dehumidifier is very different from a compressor-style unit. It is still designed to remove humidity from the air but instead of using condensation, it uses a chemical compound. The chemical used to pull moisture from the air is called a desiccant.

There are quite a few different types of desiccant-style dehumidifiers. Here we will look at how the different desiccant dehumidification systems differ and provide some specific examples of some of the best desiccant dehumidifier options on the market.

Understanding Humidity

Humidity is a fundamental aspect of indoor air quality that significantly affects our comfort, health, and the condition of our surroundings. A solid understanding of humidity and its ramifications is crucial for creating a pleasant and sustainable indoor environment.

What Is Humidity?

In its simplest form, humidity signifies the presence of moisture or water vapor in the air. Typically expressed as a percentage, it illustrates the ratio of water vapor in the air to the maximum amount it could hold at a given temperature. Essentially, humidity tells us how moist or dry the air feels.

Humidity’s Influence

Humidity’s influence extends beyond comfort and health; it also has significant implications for property and indoor spaces:

• Comfort and Health: High humidity can make the air feel heavy and uncomfortable, leading to that sticky, muggy sensation. Conversely, low humidity can cause dryness, leading to discomfort and potential health issues, especially in dry climates or during the winter. Both excessively high and low humidity can pose health risks. High humidity can foster mold, dust mites, and bacteria growth, triggering allergies and respiratory problems. In contrast, low humidity can dry out your respiratory passages, increasing susceptibility to respiratory infections.
• Property Damage: High humidity can be detrimental to property. It can encourage the growth of mold and mildew, leading to structural damage, wood rot, and deteriorating indoor air quality. Moisture can also damage furniture, electronics, and other belongings.
• Energy Efficiency: Improper humidity levels can strain heating and cooling systems. Excessive moisture makes cooling less efficient, while low humidity levels can force heating systems to work harder. Both scenarios lead to increased energy consumption and higher utility bills.

Ideal Humidity Levels

Determining the ideal humidity level for indoor spaces involves striking a balance that promotes comfort, well-being, and property preservation. Maintaining humidity levels between 30% and 50% is a general guideline that helps achieve this balance. However, specific environmental factors, such as temperature and climate, should be considered.

This range fosters a comfortable atmosphere while minimizing discomfort and property damage associated with extreme humidity. It’s essential to monitor and adjust humidity levels as needed to create a harmonious indoor environment.

The Different Types of Desiccant Dehumidifiers

There are four different types of desiccant dehumidifiers. They include:

Disposable Desiccant Dehumidifiers

This type of dehumidifier is also known as a moisture absorber. These are relatively inexpensive and disposable as they cannot be reused more than once. They work simply by exposing the moist air to a small container of absorbent crystals. Once full, the container is thrown away.

Rechargeable Desiccant Dehumidifiers

A rechargeable style desiccant is also a moisture absorber but instead of being disposed of once the absorbing material is full, it can be ‘recharged’ for future use. The recharging is essentially a drying process. Neither this nor disposable desiccants are suitable for use in large areas.

However, the size of a rechargeable or disposable desiccant dehumidifier makes these options great for use in small applications. They are effective when used in cupboards or wardrobes, and are also considered a great gun-safe desiccant dehumidifier.

Full-Size Desiccant Dehumidifiers for Home Use

These are generally smaller in size than compressor-type dehumidifiers. Also, the amount of moisture removed from the air by a full-size consumer-grade desiccant dehumidifier will be less. They will roughly cost between $150 and $350.

Commercial Desiccant Dehumidifiers

These are typically the models that are used by construction contractors. A commercial desiccant dehumidifier has the ability to dry air that is already dry. They can also dry materials in either a very cold or very warm temperature. Compressor-type dehumidifiers are not very effective at doing this.

How A Desiccant Dehumidifier Works

Desiccant dehumidifiers operate on a fascinating and efficient principle of moisture removal. Unlike their compressor-based counterparts, they rely on a different mechanism to extract excess humidity from the air. Let’s delve into the inner workings of desiccant dehumidification.

How Desiccant Dehumidification Actually Works

1. Desiccant Material: The core component of a desiccant dehumidifier is the desiccant material, such as silica gel or zeolite. This material has a remarkable ability to attract and hold water molecules.
2. Air Circulation: The process begins as ambient air, laden with moisture, is drawn into the dehumidifier by a fan. This moist air is saturated with water vapor and needs to be dehumidified.
3. Absorption: The incoming moist air is directed to pass over or through the desiccant material. Here, the desiccant rapidly absorbs the water vapor from the air, significantly reducing its humidity level. This absorption process is the key distinction between desiccant dehumidifiers and their compressor-based counterparts.
4. Separated Air Streams: Once the desiccant has absorbed moisture, the now-dry, dehumidified air is released back into the room. However, the desiccant material itself must be regenerated to continue effectively dehumidifying.
5. Regeneration: To rejuvenate the desiccant, a portion of the moisture it has absorbed is heated or subjected to a separate airstream, known as the regeneration or exhaust airstream. This heated air carries away the moisture, allowing the desiccant to release water molecules and be reused for further dehumidification.
6. Collection and Disposal: Depending on the design of the desiccant dehumidifier, the collected moisture may be managed in various ways:
   • Gravity Drainage: In some models, the water collected during the regeneration process is directed into a reservoir or collection tray within the dehumidifier. Users can then manually empty this tray when it reaches capacity. Some units offer the option for continuous drainage through a hose, allowing for automated water disposal.
   • Condensation: Certain desiccant dehumidifiers employ a condensation process. Moisture removed from the air during dehumidification is condensed into liquid form. This liquid is then directed into a collection container or reservoir, which must be emptied every now and then.
   • Evaporation: In more advanced desiccant dehumidifiers, the moisture collected during regeneration is subjected to an evaporation process, transforming it into water vapor that is released into the exhaust airstream. This eliminates the need for manual water disposal.

Comparison to Compressor-Based Dehumidifiers

Desiccant dehumidifiers offer several advantages over their compressor-based counterparts:

• Energy Efficiency: Desiccant dehumidifiers are often more energy-efficient in lower-temperature conditions, making them suitable for colder climates.
• Low-Temperature Operation: They can effectively remove moisture even in colder environments where compressor-based models may struggle.
• Portability: Desiccant dehumidifiers are generally more compact and portable, making them versatile for various applications and spaces.
• Quieter Operation: They tend to operate more quietly, making them suitable for bedrooms and other quiet areas.

Suitability for Specific Conditions

Desiccant dehumidifiers are particularly well-suited for specific scenarios:

• Cold Climates: In areas with cold winters, where temperatures may drop significantly, desiccant dehumidifiers maintain their efficiency, while compressor-based models may struggle in the cold.
• Low Humidity Needs: They excel in environments where maintaining lower humidity levels is crucial, such as archives, museums, or specific industrial processes.
• Portable Applications: Their compact size and portability make them ideal for temporary use in RVs, boats, or small spaces.

Advantages and Disadvantages of Desiccant Dehumidifiers

Because desiccant dehumidifiers differ quite a lot from regular compressor-style dehumidifiers such as whole-house dehumidifiers, it is good to know what some of the advantages and disadvantages are.

Advantages

• Low-temperature operation
• Consistent moisture removal rate
• Extremely quiet operation
• Lightweight and portable
• No refrigerants, making them eco-friendly.

Disadvantages

• Limited moisture removal capacity. This means that they may not be suitable for extremely humid conditions
• Depending on the style, they can be higher cost compared to compressor-style dehumidifiers
• Potential odor release.

Our Reviews Of The 7 Best Desiccant Dehumidifier Options

To find out more about the best desiccant dehumidifier options on the market, here is a review of some of the most popular choices:

Ivation 13-Pint Dehumidifier

This small desiccant dehumidifier features quiet operation because it does not have a compressor. The desiccant rotor technology does all the work of removing up to 13 pints/day.

The washable filter inside the unit is easy to clean by using either a vacuum cleaner or water.

One major bonus is that this desiccant dehumidifier is designed for continuous drainage; use a hose to drain the unit into a bucket or nearby drain.

ECOR PRO 50 Pint Desiccant Dehumidifier

This quiet dehumidifier is a great option for larger areas, removing up to 50 pints of moisture from 1000 square feet.

It is designed to be left on all the time and regulates the humidity to the desired level. It vents the moist air outside so that there are no buckets or drain hoses required. This makes it perfect for crawl spaces and ceilings. It can also work in a wide range of temperatures.

Many regard this as one of the best desiccant dehumidifier options because, even though it removes a lot of moisture, it is relatively small in size… measuring 7.9 x 11.8 x 7.9 inches.

Dry-Packs 750 Gram Silica Gel Canister Dehumidifier

This is a portable desiccant dehumidifier that is actually a small steel canister that contains 750 grams of silica gel. The sturdy construction of the canister means it can be moved around and placed in just about any small location without fear of it getting damaged.

The silica gel is top-grade orange that is easy to recharge when needed. The manufacturer states that this small dehumidifier can be used for a lifetime and still be effective.

It is recommended for use in gun cases, ammunition storage, camera bags, toolboxes, shoes, and cabinets. It can also be used in drawers, backpacks, camping gear, RVs, trailers and anywhere else moisture in the air can be a problem.

The orange silica gel turns dark green when it requires reactivation. You can reactivate the small humidifier in the oven. Full instructions included.

Eva-Dry E-333 Renewable Mini Dehumidifier

If you have a small enclosed area measuring roughly 10 feet by 10 feet this mini desiccant dehumidifier system is perfectly matched for the job. Using a specialized and engineered crystallized silica gel, this handy little product can be hung in a closet or other location to work.

The ‘moisture meter crystals’ change from orange when they are dry to green when they are wet. That’s when you need to ‘renew’ the unit for reuse. Recharging the crystals is easy as you just plug the dehumidifier package into a wall outlet.

Depending on the humidity level where you intend to use this product, it will absorb about 8 to 10 ounces of moisture in three to eight weeks. When you consider that you would use this in a small storage place that is a pretty good timeframe for humidity control.

OSG-40 Silica Gel Dehumidifier

With a brand name like Hydrosorbent, you’ve got to get a bit of a feeling that this is a pretty serious product. In fact, it is actually a rather big name for a small item. That’s okay as it is designed for use in areas measuring roughly three cubic feet.

Think dresser drawers, wardrobes, and toolboxes. As it turns out, the silica gel inside this canister can be recharged with heat – recommended by an oven by the manufacturer – and as a result, this product will last a long time provided it is reactivated when needed.

Dry & Dry 300 Gram [5 Packets] Premium Pure & Safe Silica Gel Desiccant

These packets measure 4 ½-inches by 7 ½-inches and they are filled with silica gel beads that are between 2 and 4mm in size. The packets are made from a strong fabric that uses Spunbond Technology for ultimate moisture absorption.

You just lay the package where you need moisture control. That could be in the bottom of a drawer, on a closet shelf, or wherever you need it. Dry&Dry has been in the desiccant silica gel business for over 30 years and manufactures various size packets of their product.

Dry & Dry 5.5 Lbs Silica Gel Desiccant Beads

The silica gel beads in this 5.5-pound tub change color from blue to pink indicating they have pulled out all the moisture in the air. That’s not a problem as you can easily recharge the beads by warming them in the oven. But how exactly would you use this volume of beads?

The packaging here is to provide you with enough silica gel beads to use in several areas. But you don’t just pour them out and hope for the best. You must package these beads in small fabric bags in order to use them effectively. That’s because you should avoid touching the beads.

You should not breathe in the dust that comes off the beads as well. However, if you do fill several bags with the beads, you will discover that they do a great job of pulling moisture from the air.

Place small bags of these beads anywhere you need to fight moisture such as in a cabinet, drawers, closets, and those kinds of places. It does a great job of protecting electronics, jewelry, books, and ammunition.

Dry & Dry is a manufacturer with over 30 years of experience in silica gel desiccants and offers a money-back guarantee with this product.

Desiccant Dehumidifiers Use Cases

Desiccant dehumidifiers are versatile appliances with a wide range of applications in various settings. Their ability to effectively control humidity levels makes them invaluable in different environments, offering solutions for comfort, preservation, and efficiency.

Residential Use

• Bedrooms: Desiccant dehumidifiers are ideal for bedrooms, where maintaining a comfortable and healthy sleeping environment is crucial. They help prevent mold growth, reduce allergens, and enhance overall sleep quality.
• Basements: Basements are often prone to high humidity, making them a prime location for mold and musty odors. Desiccant dehumidifiers are excellent at keeping basements dry and preventing moisture-related damage to stored items or structural components.
• Closets: In walk-in closets or wardrobe spaces, desiccant dehumidifiers protect clothing, shoes, and other belongings from mold, mildew, and dampness. This ensures that your wardrobe remains in excellent condition.
• Bathrooms: Bathrooms experience frequent moisture buildup due to showers and baths. Desiccant dehumidifiers help prevent mold growth, maintain a pleasant atmosphere, and protect bathroom fixtures and surfaces.

Commercial Use

• Storage Rooms: Commercial facilities often have storage areas for inventory, documents, or equipment. Desiccant dehumidifiers help maintain controlled humidity levels, preventing damage to stored items and reducing the risk of corrosion or deterioration.
• Offices: Office spaces benefit from desiccant dehumidifiers, especially in regions with fluctuating humidity levels. These devices ensure a comfortable and productive working environment while safeguarding office equipment from humidity-related damage.
• Server Rooms: Server rooms and data centers require precise humidity control to protect sensitive electronic equipment. Desiccant dehumidifiers offer reliable performance, maintaining optimal conditions to prevent overheating and static electricity buildup.

Industrial Applications

• Pharmaceuticals: Pharmaceutical companies rely on desiccant dehumidifiers to maintain strict humidity control in manufacturing, packaging, and storage areas. Stable humidity levels are critical for preserving the efficacy of medications and preventing contamination.
• Food Storage: In the food industry, desiccant dehumidifiers help extend the shelf life of products by controlling moisture levels in storage facilities. This is crucial for preventing spoilage, maintaining food quality, and complying with regulatory standards.
• Museums: Museums house priceless artifacts, paintings, and historical documents that require precise humidity control. Desiccant dehumidifiers help protect these treasures by preventing moisture-related damage, such as warping, deterioration, or mold growth.

Selecting the Right Desiccant Dehumidifier

Choosing the appropriate desiccant dehumidifier is essential to ensure effective moisture control and overall satisfaction with your investment. To make an informed decision, consider several key factors that play a crucial role in selecting the right unit for your specific needs.

Consideration of Room Size and Humidity Levels

• Room Size: Begin by assessing the size of the space you intend to dehumidify. Desiccant dehumidifiers come in various sizes and capacities, and it’s crucial to match the unit’s capacity to the room’s dimensions. Manufacturers often specify the recommended room size for each model, so pay attention to these guidelines to ensure optimal performance.
• Humidity Levels: Determine the humidity levels in your environment. If you’re dealing with extremely high humidity, you may need a more robust and larger-capacity unit. Conversely, for moderately humid conditions, a smaller unit might suffice. Understanding your humidity requirements is key to selecting the right dehumidifier for your space.

Noise Levels and Portability

• Noise Levels: Consider the noise level of the desiccant dehumidifier, especially if you plan to use it in a quiet environment like a bedroom or office. Desiccant dehumidifiers are generally quieter than compressor-based models, but some units may still produce noticeable noise. Look for models with low noise ratings if noise is a concern for you.
• Portability: If you anticipate moving the dehumidifier between rooms or locations, consider its portability. Look for features such as built-in handles or caster wheels that make it easier to transport. Compact and lightweight models are also ideal for mobility.

Features

• Adjustable Settings: A good desiccant dehumidifier should offer adjustable settings for humidity level control. Look for units that allow you to set your desired humidity level, as well as fan speed adjustments. These settings give you greater control over the dehumidification process.
• Timers: Timers can be a valuable feature, allowing you to schedule when the dehumidifier operates. This feature can help you conserve energy by running the unit only when needed, such as during off-peak hours or when you’re away from home.
• Filters: Some desiccant dehumidifiers come equipped with air filters that can capture dust, allergens, and particles, improving indoor air quality. If air purification is a priority, consider models with filter options and check the filter replacement process for ease of maintenance.

Installation and Maintenance

Setting Up a Desiccant Dehumidifier

1. Select the Location: Choose a central location within the room where air circulation is optimal. Ensure there is easy access to power outlets.
2. Positioning: Place the dehumidifier on a stable, level surface to prevent vibrations and noise. Avoid blocking air intake and exhaust vents.
3. Power Connection: Plug the unit into a grounded electrical outlet. Follow the manufacturer’s guidelines regarding voltage requirements and cord length.
4. Initial Settings: Set the desired humidity level and fan speed using the control panel or remote (if applicable). Refer to the user manual for specific instructions.
5. Drainage Option: Decide on the drainage method based on the dehumidifier model. If the unit features a drainage hose connection, attach a hose to allow for continuous drainage. For models with water tanks, place the tank securely in its designated spot.
6. Start the Dehumidifier: Turn on the dehumidifier, and it will begin extracting moisture from the air. Monitor the unit to ensure it operates correctly.

Tips for Maintaining and Cleaning the Unit

• Regular Cleaning: Clean the water tank, air intake, and exhaust vents regularly to prevent the buildup of dust and debris. A clean unit operates more efficiently.
• Filter Maintenance: If your dehumidifier has a filter, clean or replace it according to the manufacturer’s recommendations. A clean filter ensures better air quality.
• Check Drainage: If you use a drainage hose, inspect it periodically for clogs or obstructions. Ensure it is securely connected to prevent leaks.
• Inspect for Leaks: Check for any water leaks around the unit, especially if you are not using continuous drainage. Address any leaks promptly to prevent damage to the floor or surrounding area.
• Empty the Tank: If your dehumidifier has a water tank, empty it when it reaches capacity. Some units feature an automatic shut-off when the tank is full.

Troubleshooting Common Issues

• Unit Not Operating: Check the power supply, ensure the tank is properly inserted (if applicable), and review the settings. If the problem persists, consult the user manual or contact customer support.
• Inadequate Dehumidification: If the unit isn’t effectively reducing humidity, ensure it is correctly sized for the room’s dimensions and humidity level. Also, check that the filter is clean and not obstructed.
• Unusual Noise: Unusual noises may indicate a loose or damaged part. Inspect the unit for loose components or foreign objects in the fan or other moving parts.
• Water Leaks: Leaks can occur if the drainage hose is improperly connected or if the tank is not securely in place. Double-check these connections.

Energy Efficiency and Cost Savings

Desiccant dehumidifiers are known for their energy-efficient operation, particularly in specific conditions:

• Low-Temperature Efficiency: Unlike compressor-based dehumidifiers that may struggle in colder environments, desiccant units maintain their efficiency at lower temperatures. This efficiency means less energy consumption, especially in chilly seasons.
• Zoned Dehumidification: Desiccant dehumidifiers allow you to target specific areas or rooms, rather than dehumidifying an entire home. This zoned approach reduces energy usage by focusing on where it’s needed most.
• Adaptive Control: Many modern desiccant dehumidifiers feature adaptive control systems that adjust the unit’s operation based on current humidity levels. This means the unit only works as hard as necessary, conserving energy.

Cost Comparisons with Other Dehumidifiers

To illustrate the cost-saving benefits of desiccant dehumidifiers, consider the following scenario:

• Comparing to Compressor-Based Units: In a colder climate, a 2,000-square-foot home with high humidity might require either a desiccant dehumidifier or a compressor-based unit. Over a year, a desiccant dehumidifier might consume 350 kWh, costing around $50. In contrast, a similar-capacity compressor-based unit could use 500 kWh, costing approximately $70. The difference in energy consumption results in annual savings of $20 or more with the desiccant dehumidifier.

These figures will vary depending on factors like humidity levels, room size, and local electricity rates. However, in general, desiccant dehumidifiers often prove more cost-effective over time, particularly in colder climates. For an in-depth look at how much dehumidifiers cost to run, please see this article.

Safety Considerations

• Electrical Safety: Ensure that your desiccant dehumidifier is plugged into a grounded electrical outlet with the appropriate voltage. Avoid overloading circuits, and use surge protectors if necessary. Check power cords and plugs regularly for signs of wear or damage.
• Water and Electricity: Be cautious about water and electrical components. Keep the dehumidifier away from water sources, and do not touch the unit with wet hands. If you notice any water leaks or damage to the electrical components, unplug the unit immediately and seek professional repair.
• Ventilation: Adequate ventilation is essential when using a desiccant dehumidifier. While these units can help maintain indoor air quality, ensure that the room is adequately ventilated to prevent the buildup of stale air. If the room is tightly sealed, consider periodically opening windows or doors to exchange air.

Desiccant Dehumidifier FAQs

In Conclusion

In the ongoing battle against the damaging effects of humidity on your belongings, you don’t always have to resort to electronic devices to do the job. Some of the best desiccant dehumidifiers are non-electric and non-toxic. They are moisture absorbers and work like a sponge sucking water out of the air.

Make sure that you have a look at some of the options we have mentioned above. As you can see, there are a variety of styles, and they are well-priced. So you should be able to find a small desiccant dehumidification system to suit your needs.