Best Dehumidifier for Safe

Humidity control is essential in maintaining a safe and keeping its contents free from damaging moisture. Depending on the size of the safe, the climate in your place, and the number of items in storage, there are different types of dehumidifiers made for this purpose. You can use either an electric dehumidifier or a renewable desiccant.

Safes protect your valuables—documents, jewelry, and even firearms and ammunition—from theft and fire accidents, but these storage spaces are also prone to condensation or moisture buildup. Over time, exposure to moisture can cause serious damage to any of your items in storage, especially paper and fabrics. The metal storage can also become damaged from rust and corrosion due to excess moisture. 

To prevent these problems, you must stop moisture from building up before it gets worse. When you purchase a dehumidifier for your safe, it’s essential to know the capacity you need based on the size and moisture level of the space and look at each of the features available. To help you decide, we’ve created a list of dehumidifiers as well as the features you need to know in order to choose what’s best. 

Top 6 Best Safe Dehumidifiers

  • Dimensions: 7.2 x 5.1 x 2.1 inches
  • Weight: ‎0.43 Pounds
  • Floor Area: 333 Cubic Feet
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  • Dimensions: 9 x 8.25 x 2.88 inches
  • Weight: 1.2 Pounds
  • Floor Area: 333 Cubic Feet
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  • Dimensions: 5 x 3.5 x 1.25 inches
  • Weight: 0.4 Pounds
  • Floor Area: 50 Cubic Feet
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  • Dimensions: 6 x 5.1 x 4.25 inches
  • Weight: 2.09 Pounds
  • Floor Area: 50 Cubic Feet
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  • Dimensions: 9.5 x 9.5 x 2 inches
  • Weight: 1.92 pounds
  • Floor Area: 500 cubic feet
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  • Dimensions: 8.19 x 7.8 x 4.65 inches
  • Weight: 1.01 pounds
  • Floor Area: 54 Square Feet
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  • Dimensions: 12 x 1.12 x 1 inches
  • Weight: 0.2 pounds
  • Floor Area: 100 cubic feet
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Hornady Rechargeable Dehumidifier

Hornady Rechargeable Dehumidifier

Hornady specializes in security equipment and accessories for firearms and ammunition. This includes ammunition cartridges, storage equipment such as safes, vaults, lock boxes, and cabinets. For moisture control inside a gun safe, or really any kind of safe or vault, this rechargeable gun safe dehumidifier by Hornady requires no batteries or electricity to work. It uses renewable silica gel to extract moisture from the air, protecting your valuables from mold and mildew. It also includes a bracket for mounting inside your safe. 

The silica gel will change color from orange to green when it has reached its full capacity. You can check through the window when the silica gel changes color. When this happens, the dehumidifier needs to be recharged. Simply plug it into a 110V outlet for 10 to 12 hours or until it has fully dried out and the beads are orange again. This rechargeable dehumidifier is ideal for any tiny space up to 333 cubic feet. The best thing about renewable dehumidifiers is you can recharge and reuse them as many times as you need.

Product Highlights:
• Requires no batteries or cords
• Portable and easy to use
• Recharging takes longer than other similar dehumidifiers

Eva-Dry E-333 Wireless Mini Dehumidifier

Eva-dry E-333 Renewable dehumidifier

When looking for renewable dehumidifiers, you’ll always find the best-selling Eva-Dry E-333. It also uses silica gel beads to remove excess moisture from the air inside your safe without batteries or cords. Through the window, you can see the beads change color from orange to green once they have reached maximum capacity of 4 to 6 ounces of moisture, usually within 30 days or four to six weeks.

Eva-Dry is light and compact, perfect for any tiny space where you need moisture control including a safe or cabinet, as well as closets and pantries. As the name suggests, the Eva-Dry E-333 can cover up to 333 cubic feet. For a larger space, consider the Eva-Dry E-500 for up to 500 cubic feet. 

Eva-Dry is completely safe and environment-friendly with non-toxic, 100% leak-free silica gel beads. To recharge it, just plug the unit into a power outlet for eight to ten hours or until the beads have turned orange. You can reuse the silica gel for up to ten years, guaranteed with a five-year warranty.

Product Highlights:
• Best-selling renewable mini dehumidifier
• Easy-to-use cordless operation
• Can take a while to recharge

BARSKA Moisture Absorber

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

Another easy-to-use, affordable option for moisture control in tiny storage spaces is the Barska moisture absorber. This desiccant bag contains 150 grams of renewable silicon dioxide, which extracts moisture from your safe or cabinet and even cars or RVs.

It can remove up to 7 ounces of moisture within a few weeks up to three months of using. The humidity indicator turns from blue to pink when the desiccant has reached full moisture capacity.

The silicon dioxide desiccant is microwave-safe for easy and quick reactivation. To recharge the desiccant, place it in the microwave for up to four minutes at a 600W setting. This recharging process is significantly shorter than most other renewable dehumidifiers. Make sure to remove any grease or oil in the microwave or on the desiccant bag. Once any grease gets on the unit, do not continue drying it in the oven and replace it with a new dehumidifier.

Product Highlights:

Microwave-safe design

Fastest recharging process

Hornady Canister Dehumidifier 95902 

Hornady Canister Dehumidifier 95902

Hornady offers three types of gun safe dehumidifiers, two of which are desiccant. This canister dehumidifier uses renewable desiccant technology that requires no batteries or electricity to work. Its sleek and simple design fits in any corner of your safe or cabinet. 

When the blue cap indicator turns pink, the unit needs to be recharged. You can easily renew the desiccant by placing the canister in a 300°F oven for four hours or until the cap turns blue again. Despite its small coverage area of 57 cubic feet, Hornady is known for its long-time reliability and durability. Ensured with a lifetime warranty, you can recharge and reuse this dehumidifier as many times as needed. 

Protect and preserve guns and bullets in storage with this Hornady gun safe dehumidifier or the larger 95906 unit. It’s also ideal for any small spaces including lockers, closets, and even cars, RVs, or boat cabins.

Product Highlights:
• Portable, cordless dehumidifier
• Lifetime warranty
• Shorter recharging but oven use can be inconvenient

SnapSafe Rechargeable Dehumidifier 75901

SnapSafe Rechargeable Dehumidifier 75901 

SnapSafe manufactures gun equipment including safes, lock boxes, and other security accessories under the Hornady company. Like Hornady, it also offers different types of gun safe dehumidifiers including a silica gel canister, a rechargeable dehumidifier, and an electric rod. 

This rechargeable SnapSafe dehumidifier by is a good alternative to the popular Eva-Dry. Similar to the rest of our picks, it requires no batteries or electricity to actively work. The silica gel inside change color once it has extracted all the moisture it can hold.

You can check through the top window when the silica gel changes color and needs to be recharged. It can cover a relatively larger area of 500 cubic feet. The smaller unit 75900 is ideal for 333 cubic feet spaces. You can recharge and reuse the unit as many times as you need, guaranteed by SnapSafe’s lifetime warranty for all of its products. Simply plug it into a standard outlet for up to 12 hours.

Product Highlights:
• Requires no batteries or cords
• Lifetime warranty
• Recharging takes longer

Afloia Cordless Dehumidifier

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

Afloia is also a best-seller in mini dehumidifiers, including this cordless desiccant unit. This cordless dehumidifier uses the same renewable silica gel contained inside a more unique design. The cylindrical surface improves its efficiency by increasing the area of contact with moisture. This cordlessdehumidifier extracts up to 4oz or 100ml of moisture in small spaces up to 54 square feet such as safes and closets.

Similar to the rest of our picks, the silica gel inside will change color from orange to green once it has extracted its maximum capacity. You can monitor the status through the top window. Unlike the models above, this Afloia dehumidifier as a whole is not actually cordless. The dehumidifying unit itself is wireless but when recharging, the PTC heating base is wired. 

To renew the silica gel, place the dehumidifier on the heating base for about two hours. While recharging, the base blows warm air out through the vents and the indicator light flashes green. When recharging is done, the light will flash white and the dehumidifier will be on standby mode. Pick up the dehumidifier and put it back in your safe or place it on the base to start working while plugged in. The unit comes with a one-year warranty.

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

Lockdown GoldenRod Dehumidifier 

Lockdown GoldenRod Dehumidifier 

For larger safes with a nearby electrical outlet, an electric rod dehumidifier is probably the most effective way to prevent condensation inside your storage. Instead of extracting moisture from the air, this style of dehumidifier works more similarly to a space heater. It reduces humidity as a result of heating up the air. If you want to go with this type of dehumidifier, your best choice is the GoldenRod Gun Safe Dehumidifier. It can increase the air’s temperature up to 150°F or 65°C and keep humidity levels within 40% – 50% RH.

This electric dehumidifier can be easily installed  if you have an existing plug or power strip inside the safe. The GoldenRod includes a quick plug attachment and mounting brackets. It comes in multiple lengths with growing coverage: 12, 18, 24, and 36 inches. The 12” version can cover up to 100 cubic feet, while the 36” covers up to 500 cubic feet. It’s recommended to place the rod horizontally at the bottom of your safe.

One potential problem with rod dehumidifiers is that they can become too hot to touch. Uncomfortable, but not unsafe. Consider the fact that this type of dehumidifier needs to be plugged in constantly or they will not heat up the space. All units are guaranteed with a lifetime warranty. 

Product Highlights:
• Quick installment and maintenance-free
• Superior heating capability
• Comes in four sizes for optimal coverage
• Lifetime warranty
• Can get too hot to touch

Why You Need a Dehumidifier in Your Safe

A safe is typically used to store valuables such as jewelry, cash, or important documents, as well as to safeguard any firearms and equipment. While it protects your belongings from theft and fires, they’re not safe from potential damage due to condensation. Since a safe is a tightly sealed space that you probably won’t open frequently, warm air gets trapped inside along with any moisture from the items in storage. This allows humidity to rise beyond healthy levels.

Because a safe is an enclosed space, the moisture from items like paper or fabric evaporates into the air with nowhere else to go. When the moist air hits a cooler surface, condensation occurs—on any side of the safe. When moisture builds up, it can cause metals to tarnish, rust, and corrode. This isn’t only visually unpleasant, it can also weaken the material of any metal inside your safe or even the safe itself. Over time, it can even cause firearms to malfunction.

A dark and damp space like the inside of your safe also creates a perfect environment for the growth of mold and mildew. Although metal surfaces may not be as prone to these organisms, other materials like paper and fabrics attract mold. Touching mold or inhaling mold spores can lead to allergy symptoms and trigger other health conditions.

To prevent these problems in your safe, you need to find the right dehumidifier specifically designed to dehumidify the space. Once installed, most dehumidifiers for safes require little to no attention. If you go with a desiccant, you just need to find some time to recharge it. Electric dehumidifiers only consume a small amount of power that you’ll barely even notice. 

How Do You Remove Moisture From a Safe

Firstly, choose the best dry location to place your safe. If you live in a humid region, at least find the part in your house with the least moisture levels. Some areas are naturally more humid like the basement in its cold and damp underground location. Choose a place with a more controlled environment or run an air conditioner or dehumidifier inside the room to protect the whole space from moisture.

Open the safe regularly to let cool air in and help dry up the moisture inside. You can do this for at least 20 to 30 minutes every two weeks or so. Check the items inside and look for signs of moisture in case you need to add moisture absorbers or other similar products.

You really can’t avoid humidity inside your safe, especially if it contains materials like paper and fabric that are prone to moisture. To prevent moisture from accumulating and damaging other items, use moisture-absorbing products common in most households. You can use salt, baking soda, or rice, which you can all find in your kitchen. You can also use calcium chloride or silica gel, which you can purchase from hardware stores. Just fill a small amount in a bowl or any leak-free container and place it in your safe. Remember to check at least every week and replace the contents as needed.

There are many alternative ways to remove excess moisture in a safe or any storage space. While these might work to a certain degree, a dehumidifier is still the most effective and efficient solution to humidity control inside your safe. 

Types of Dehumidifiers for Safes

There are two types of dehumidifiers commonly used in gun safes (or any safe in general) and other similar storage spaces: the electric and non-electric or desiccant dehumidifier. The main difference between the two is the former actively uses electricity when operating. 

Electric Dehumidifier

This type of dehumidifier works by heating up a rod, using heat to lower humidity. Then, it circulates warm air within the space. Because hot air rises, it’s recommended to position this type of dehumidifier near the bottom of a safe. The heat stabilizes the temperature inside, preventing moisture from building up.

The main advantage of an electric dehumidifier is that it doesn’t require much upkeep. All you need to do is install it, plug it in, and the space will stay warm and dry all day and night. The only downside to electric rods is needing to connect the plug inside your safe. It might also be inconvenient for some to have an electrical appliance plugged in all the time. 

Desiccant Dehumidifier

Desiccant dehumidifiers use hygroscopic chemicals or desiccants to absorb moisture from the air. The most common of which is silica gel or the little beads in the packets inside some of your new purchases, like a new handbag or shoes. It works through a process of adsorption, allowing you to renew the unit for repeated use. Renewable desiccant dehumidifiers don’t use electricity or batteries for operation. 

As the moist air comes into contact with the desiccant, the moisture clings to the surface of the desiccant until it cannot hold any more moisture. Once the full capacity is reached, the color of the silica gel beads changes. Then, you will need to remove the moisture or recharge the desiccant either by plugging the unit into a power outlet or putting it inside an oven. Plugging in an outlet usually takes about eight to ten hours, while the oven method is faster – around two hours or so.

Renewable dehumidifiers typically contain 500 to 750 grams of silica gel, removing 4 to 6 ounces of moisture. They are not meant to reduce humidity levels in a full-sized room but only to keep moisture and musty odors away in a tiny, enclosed space. The main advantage is they can be renewable for several years up to a decade. The only maintenance needed is a recharge every few weeks, depending on your humidity levels. 

Although they do need electricity to recharge, they do not actively need it to accomplish the task. Anyone can use this type of dehumidifier in almost any tiny, enclosed space vulnerable to moisture. Simply place the unit wherever you need and it will start working. Just make sure to check it and recharge it on time

How to Choose a Dehumidifier for Your Safe

A dehumidifier is a valuable investment for your storage safe, but you can’t expect just any unit to work exactly as you need it to. When deciding which dehumidifier to purchase, consider some of these important factors first: 


The type of dehumidifier you use is very important. Now that you know the differences between the electric and desiccant dehumidifiers, take note of the capabilities and installation requirements of each unit to find the best option for your safe. If you choose the desiccant type, make sure you get the right size and don’t forget to check its status and recharge it on time. If you prefer electric, ensure that your safe has the space to accommodate the unit as well as the needed plug/wiring. Whichever type you choose, make sure that you can commit to observing appropriate maintenance.


Calculate the size and volume of your safe to determine what type of dehumidifier will best fit. Renewable dehumidifiers are made to fit in almost any space, from gym bags, closets to cars. If you want to use a rod-style electric dehumidifier, the smallest you can get is 12 inches long, and it should sit at the bottom of your safe. It’s always best to go with the longest rod that can fit inside to maximize coverage. Get the measurements of your safe to make sure it fits in the space and it can provide the required heat for all items inside. 

Manufacturers indicate the recommended area each unit can handle. The same is true for desiccant dehumidifiers. Check the coverage area for each model and if you have a large space, consider using multiples spaced out to increase coverage area. 

Temperature and Humidity Level

Temperatures and humidity levels in the room where you put your safe can also impact the amount of moisture accumulation inside. If you live in a high-humidity area and place the safe in a basement where it’s usually the most damp, then you can expect more moisture. More than the humidity level itself, fluctuations in temperatures outside the safe can cause condensation inside. When the temperature drops significantly, the cold walls will cool down the warm air inside, resulting in condensation. 

Installation and Maintenance Requirements

Each type of dehumidifier requires certain steps for proper installation and maintenance. Dehumidifiers for safes and other tiny spaces have minimal requirements but you do need to meet them to ensure the unit you choose can work efficiently. Take note of the recharging process, the time it takes between each recharge, and the typical lifespan of the unit.


Any closed space like a safe or vault is particularly vulnerable to moisture. To truly protect your items in storage, you need to control moisture levels by using a dehumidifier designed for this type of space. There are two types available and you must understand the capabilities each of them offers, and then compare it with your own needs. Electric dehumidifiers and renewable desiccant dehumidifiers both play a specific role in controlling moisture levels in such small spaces. You can greatly benefit from the best gun safe dehumidifiers if you know where and how to use them properly. For maximum moisture removal, you can even use different types of mini dehumidifiers in one space.

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