Best Dehumidifier for Car

Condensation is a common occurrence in cars, especially in wintertime. When moist air gets trapped inside the vehicle it forms fog or water droplets when it hits the cold glass surface of the windows or windshields. When moisture inside the car isn’t controlled, it can give rise to different problems including mold and musty odors. Mold loves cold, dark, and moist places. Mold spores and bacteria in high-humidity environments can cause allergies, asthma attacks, and other respiratory issues.

Excess moisture and mold can also damage the fabrics and soft furnishings in your car, as well as lead to rust and corrosion which may compromise your safety over time. To prevent these problems, you can reduce moisture content inside your car by simply opening a window and letting fresh air inside. However, you can’t keep your windows open all the time for obvious reasons.

In this case, a dehumidifier is the best solution to control humidity levels in your car. The best car dehumidifier is typically the desiccant type. To help you choose the best unit for your vehicle, we’ve come up with this guide to explore the features and benefits of a car dehumidifier, as well as other tips to help prevent condensation or moisture buildup in any season.

Summary of the Top 5 Best Dehumidifier for Car

  • Dimensions: 9 x 8.25 x 2.88 inches
  • Weight: 1.2 pounds
  • Tank Capacity: 6 Ounces
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  • Dimensions: 8.15 x 7.8 x 4.69 inches
  • Weight: 1.01 pounds
  • Tank Capacity: 4 Fluid Ounces
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  • Dimensions: 7.3 x 6 x 2 inches
  • Weight: 15.1 ounces
  • Tank Capacity: 5 Ounces
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  • Dimensions: 6.69 x 4.13 x 5.63 inches
  • Weight: ‎1.37 pounds
  • Tank Capacity: 1.1 Pounds
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  • Dimensions: 5 x 3.5 x 1.25 inches
  • Weight: 6.4 ounces
  • Tank Capacity:
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Eva-Dry E-333 Renewable Dehumidifier

Eva-dry E-333 Renewable dehumidifier, Pack of 1, White Sand

• Extracts up to 6oz of moisture
• Covers up to 333 cubic feet
• Lasts 20 to 30 days
• Five-year warranty

Afloia Cordless Dehumidifier

Mini Dehumidifier, Afloia Gun Safe Dehumidifier Rechargeable Cordless Dehumidifiers with Heating Base

• Extracts up to 4oz of moisture
• Covers up to 54 sq. ft.
• 360-degree cylindrical design
• PTC heating base

Pro Breeze Cordless Dehumidifier

Pro Breeze Wireless Mini Dehumidifier for Small Spaces, Bedrooms, Wardrobes, Closets, Cars

• Extracts up to 5oz of moisture
• Covers up to 333 cubic feet
• Lasts 20 to 30 days

DampRid Moisture Absorber

DampRid Moisture Absorber with Activated Charcoal for Boats & RVs

• Absorbs up to 18oz of moisture
• Activated charcoal removes odors
• Lasts up to 60 days

BARSKA 150g Moisture Absorber

BARSKA Safe Moisture Absorber Dehumidifier for Home Closets, Safes, and Cars

• Extracts up to 7oz of moisture
• Microwave-safe design

Best Car Dehumidifier Reviews

Eva-Dry E-333 Renewable Dehumidifier

Eva-dry E-333 Renewable dehumidifier

For cars, small RVs, and even closets or cabinets, a wireless, mini dehumidifier is often all you need to keep humidity down. This type of renewable desiccant dehumidifier typically use silica gel to extract excess moisture from the air. The Eva-Dry E-333 Renewable Dehumidifier is perhaps the best-selling mini desiccant dehumidifier today. It doesn’t require electricity or batteries to start working, making it the perfect dehumidifier for vechicles. It is also completely safe, non-toxic to children and pets. 

All you need to do is place it in the car, on the dashboard, rear deck, or compartment. When the silica gel beads in the window change color from orange to green, this means they have already accumulated about 4 to 6 ounces of moisture. This usually happens within 20 to 30 days or 3 to 4 weeks. At this time, simply plug the unit into a power outlet to dry out the moisture and your dehumidifier is now as good as new. This process can take about eight to ten hours and you can do this repeatedly for up to ten years, guaranteed by a five-year warranty.

As you may have guessed, the Eva-Dry E-333 can cover an area of up to 333 cubic feet. Remember that this type of dehumidifier only works in tiny, enclosed spaces and does not reduce humidity levels significantly. Eva-Dry is extremely light and portable, weighing only 14 ounces or barely a pound. It can easily fit inside closets, safes, cabinets, and even gym bags. The Eva-Dry renewable dehumidifier is also available in twin packs and a bigger capacity.

Product Highlights:
• Best-selling renewable dehumidifier
• Cheap, light, and compact
• Easy, wireless operation and recharging
• Up to five years warranty

Afloia Cordless Dehumidifier

Mini Dehumidifier, Afloia Gun Safe Dehumidifier Rechargeable Cordless Dehumidifiers with Heating Base

Similar to the Eva-Dry unit, this Afloia cordless dehumidifier does not require electricity or batteries to operate. It also extracts moisture from the air using renewable silica gel technology. The unique cylindrical design increases the area of contact with moist air, improving its efficiency to absorb moisture. This mini cordless dehumidifier extracts up to 4oz or 100ml of moisture in spaces up to 54 square feet.

The silica gel crystals change color from orange to dark green once they have reached maximum moisture capacity. You can monitor the silica gel through the top window so you can recharge the unit as needed. The Afloia unit is unlike other rechargeable dehumidifiers you need to plug directly. Only the PTC heating base is wired, and the dehumidifier stick itself is wireless. 

To renew the silica gel beads, all you need to do is place the cylinder on the heating base for about two hours. While recharging, the base blows warm air out through the vents and the indicator light will flash green. When recharging is done, the light will flash white and the dehumidifier will be on standby mode. Simply pick up the dehumidifier stick and place it back in the car or any other small space prone to excess moisture.

Due to its design, the Afloia cordless dehumidifier is also ideal for use in a gun safe, cabinet, closet, kitchen pantry, and even a small bathroom, RV, or boat cabin. It comes with a one-year manufacturer warranty.

Product Highlights:
• Light and compact
• No batteries required
• Wired heating base
• Fast recharging process (only 2 hours)

Pro Breeze Cordless Dehumidifier

Pro Breeze Wireless Mini Dehumidifier for Small Spaces, Bedrooms, Wardrobes, Closets, Cars

Pro Breeze is another dehumidifier brand known for mini models such as Peltier and desiccant dehumidifiers. While it’s more popular for this Peltier unit, Pro Breeze also offers a mini renewable desiccant similar to the Eva-Dry E-333 dehumidifier. The silica gel beads can hold up to 5oz of moisture and guaranteed spill and mess-free.

Similarly, this Pro Breeze wireless dehumidifier covers up to 333 cubic feet and lasts 20 to 30 days. You can check the status of the silica gel from the transparent moisture indicator. When they change color from orange to green, then they have reached maximum capacity. To recharge, you need to plug the unit for 8 to 10 hours and the unit is ready for use again. This dehumidifier is ideal for any tiny space you need to control moisture. It’s guaranteed by a one-year warranty.

Product highlights:
• Cheap, light, and compact
• Easy, wireless operation and recharging

DampRid Disposable Moisture Absorber

DampRid Moisture Absorber with Activated Charcoal for Boats & RVs

Compared to other desiccant dehumidifiers, DampRid moisture-absorbing bags and tubs don’t require electricity at any point. It is made mostly of calcium chloride crystals that absorb moisture as soon as they are exposed to moist air. The crystals harden as they collect water, then eventually dissolve into a liquid. This process can take a few weeks up to months. Once all the crystals are gone, all you can do is dispose of the product and replace it.

DampRid comes in a small container like tubs and packets that you can put inside the car or Rv. There are also different sizes and shapes made for closets, bathrooms, bedrooms, and even larger spaces. This particular product includes activated charcoal which also helps eliminate odors in the car left by food or wet clothes and shoes. 

Moisture absorbers are easy to use. Just peel off the lid on top and place the container where you need it. However, since it collects moisture on its bottom part, there are risks of spilling the liquid in a moving vehicle. And so, you should only use this type of dehumidifier to prevent moisture buildup inside the car when it’s not in use.

Product Highlights:
• Disposable moisture absorber
• Activated charcoal beads eliminate odors
• Dissolves into a liquid when absorption capacity is reached

BARSKA 150g Moisture Absorber

BARSKA Safe Moisture Absorber Dehumidifier for Home Closets, Safes, and Cars

Another great option for humidity control in cars is the Barska moisture absorber. It absorbs moisture from the air using renewable, moisture-absorbing silicon dioxide, extracting up to 7oz of moisture within a few weeks up to three months. The silicon dioxide is microwave-safe for easy renewal of the desiccant. The humidity indicator turns from blue to pink when the desiccant has reached its maximum capacity.

To recharge or dry out the moisture collected, place it in the microwave for up to four minutes at 600W. This process takes a lot shorter than most other renewable desiccant dehumidifiers. Make sure there is no grease or oil in the microwave or it can cause a fire accident. Once any grease gets on the unit, you must not dry it in the oven and replace it immediately.

Product Highlights:
• Microwave-safe design
• Fastest recharging process

What Causes Condensation in Car

Condensation in Car

Condensation occurs when warm, moist air comes into contact with a colder surface. This happens inside the car when you get in a cold car and your body and breath produce warm, moist air that meets a colder windshield or windows. This causes fogging or a buildup of moisture on the glass. 

Moisture buildup can also happen in an unoccupied car if you leave the carpets or flooring wet. Even if you don’t notice it, they can retain water left behind from shoes and clothing, or spilled beverages.

That said, leaving wet clothes, blankets, shoes, and umbrellas lying on the seats or compartment accumulates moisture that forms condensation on the car windows. Anything with open water can potentially become the source of moisture when trapped in an enclosed space of the car.

How to Prevent Condensation in Car

When you find what causes condensation inside your car, here are some easy steps you can follow to prevent moisture buildup and keep your car dry.

First, look for signs of dampness under the seats and carpeting. Condensation on the windshield or windows is a sure sign of excess humidity. You may leave a window open on a warmer winter day to circulate dry air and reduce moisture in your car interior.

Turn on your heater or air conditioner to keep the air dry and maintain comfortable temperature. As your car’s air conditioning removes heat, it also reduces the moisture content.

Check the seals on all your windows and doors to make sure damp air is not seeping in at night. If your car has a leak, it’s best to have a mechanic examine it.

Use breathable seat covers that will stay cool and sweat-free even in hot weather. Air out your car by driving with the windows open when possible.

Do not leave wet items on the seats or on the floor to prevent moisture buildup. Even spilled water, coffee, and other food items can become a source of moisture. Make sure to remove leftover foods and wet clothes from the car.

Lastly, find a good moisture absorber like DampRid or similar products to keep moisture content down when the car is parked in the garage. Make sure to keep a close watch on the water level in the container and empty it when needed.

Why You Need to Reduce Humidity in Car

Eliminates mold and musty odors

Excess humidity creates an ideal environment for mold, dust mites, and other common allergens in the air. Keeping the humidity in your car within 30% to 50% RH makes it less hospitable for these airborne allergens, reducing the risk of allergies, asthma attacks, and other respiratory problems. 

Prevents damage to structure and furnishing

Maintaining ideal humidity helps prevent condensation, which can lead to rust, corrosion that can damage your car’s performance. Mold can grow on almost any moist surface like your car seats and carpeting. It may not be easily noticeable but once it grows in one area, it can quickly spread and eat away at the soft furnishings and fabric.

Improves air quality 

High humidity can cause discomfort or a muggy and sticky feeling, making hot weather feel even hotter and cold weather feel clammy. You won’t need to turn up the air conditioner or heater when you can use a dehumidifier in removing moisture, which also helps conserve the battery power the air conditioner might consume.

What to Consider When Choosing the Best Car Dehumidifiers

When looking for a dehumidifier for your car, here are a few considerations you must remember:

Dehumidifier Type

There are two main types of dehumidifiers based on the moisture removal method they use: the refrigerant and desiccant. For tiny, confined spaces like cars, desiccant dehumidifiers are the perfect option. This type uses hygroscopic chemicals or desiccants like silica gel to extract moisture from the air. For those who need a reminder, silica gel is what’s inside the little packets in new bags or shoe boxes. 

Renewable desiccant dehumidifiers don’t need electricity or batteries to operate. Just place them wherever you need them and they immediately start absorbing excess moisture in the air until they have absorbed all the moisture they can hold. Once this happens, you need to recharge the unit either by plugging it in or by putting it in a microwave to dry out the moisture completely. This process can take anywhere from a few minutes up to 10 hours depending on the brand and model of dehumidifier.

Disposable moisture absorbers use a different type of desiccant, usually calcium chloride or a combination of other salt crystals. These desiccant chemicals mixes with the moisture to form a liquid that collects in the bottom of the container. Once all the crystals are gone, you are left with only the liquefied form which you must dispose of.

Dehumidifier Capacity

The capacity refers to the maximum amount of moisture it can extract from the air until saturation. Mini renewable desiccant units have a very small capacity ranging from 4 to 10 ounces and moisture absorbers can hold 10 to 14 ounces depending on the size of the container. However, note that these dehumidifiers can collect this total amount of moisture only after a few weeks up to months, compared to the daily capacity of regular dehumidifiers.

Dehumidifier Features and Ease of Use

Desiccant dehumidifiers come in a wide variety of sizes with many different features. However, for car dehumidifiers, you’ll hardly see anything wildly different from the products listed above. They are essentially made of different desiccant materials in some type of container. They are all equally easy to use, but the main difference is the process of renewal (if renewable). 

These desiccant dehumidifiers don’t even require electricity or batteries to start working. You simply put them wherever you need them. The only maintenance you really need to do is remember to recharge the unit when it has reached full absorption capacity. Disposable units, on the other hand, must not be kept in a moving vehicle since they collect water in a container and thus pose risks of spilling.


It is nearly impossible for the inside of your car to stay free of moisture. But to prevent humidity from causing any damage, it’s important to keep moisture levels down and eliminate bad odors from the stale, stuffy air. A dehumidifier prevents condensation in your car’s interior and car compartments, and thus prevent mold growth. A mini dehumidifier or dehumidifier bag is usually all you need for a car. They are easily rechargeable so you can use them repeatedly for years to come. Any of our picks above can work well in most any compact car, sedan, SUV, minivans, and even RVs. You can always use multiple units in different corners for maximum coverage.

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