Mar. 10, 2025
You may be struggling with damp and think ' bingo! I'll just go online and buy a dehumidifier.
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Then you discovered the sheer number of confusing (and sometimes expensive) options out there. You realise you have no idea how to choose a dehumidifier.
Never fear ' we're here to help you. Read our easy, actionable guide to buying a dehumidifier, and fix the damp problem in your home.
Damp in your home! This is a huge problem in a cold, wet climate like the UK, and since warm air can hold more moisture, the use of central heating increases the chance of damp build-up too. With damp often comes black mould. This is not only extremely unsightly but also potentially dangerous for your belongings ' and your health! The cause of this problem is usually too much moisture in the air (high humidity) and poor ventilation, which results in lots of condensation. High humidity results in problems like:
The necessities of everyday life, including heating, cooking, showering, ironing and drying clothes add to humidity! But you can't stop doing these things.
What to do?
First, make sure there are no leaks inside your home. If there is a leak, this is probably the primary cause of your damp and you need a professional to fix it. A dehumidifier won't help.
Detect a leak: Damp detectors are electronic devices that tell you if there is damp inside your walls. You can also just use your hand to see if the wall is damp. If you think the leak is coming from your water mains, contact your water supplier.
Perhaps you are suffering from some allergies and sneezing or coughing a lot. Maybe you have noticed some signs of high humidity like:
If you notice any of these signs, you might have a problem with too much humidity. Basements, bathrooms, kitchens and attics are hotspots for high humidity.
NOTE: Mildew spots are different from mould. Mildew can be easily cleaned with standard cleaning materials and a scrubbing brush. Black mould is more insidious and can be more difficult and costly to remove.
These may be signs you need a dehumidifier, but not necessarily. The first step is to test the humidity in your home using a hygrometer, taking note of the visual signs.
Hygrometer: It's a digital device that measures humidity in the air of a room. You can buy one for less than £10.
The ideal humidity level is between 30-50% in summer, or 30-40% in winter.
If your hygrometer shows humidity above 50%, try to remove the root cause of the humidity first. The prevention method depends on the severity of the problem, the time of year, and the location of the dampness.
If the problem is in the bathroom, the solution could be as simple as opening the window when you have a shower. If the room is a damp basement, simply heating the space might be enough to dry out the air. Tips for reducing humidity:
Some of these solutions may not be possible for you, or the problem is too severe. But it's not the sort of problem you can comfortably ignore.
Black mould starts to grow at 50% humidity. Prevention is definitely better than cure when it comes to black mould. Buying a dehumidifier is a good way to prevent the conditions that lead to its growth.
A dehumidifier is a device that reduces the relative humidity in the air. Some trusted brands are Ebac, Delonghi and Meaco.
Next, learn how dehumidifiers work.
There are three main types of dehumidifier. The type you choose will depend on what your purpose is for the dehumidifier.
Peltier dehumidifiers work by pulling in damp air over the front of a cold heat sink. As the air passes over the cold surface, it condenses. The water released from the condensed air then drips down into the water tank and the dry air is released back into the room.
Refrigerant dehumidifiers (also known as compressor dehumidifiers) work in a similar way to your fridge. They use a fan to draw in air and pass it across extremely cold coils. Water condenses on the coils and drips into the water tank.
Finally, the air is reheated and pumped back into the room as warmer, drier air. This reduces the relative humidity in the atmosphere.
They differ from the peltier dehumidifiers above as they use a built-in compressor to cool down the coils as opposed to just the electric current from your mains. The compressor allows for coils of a much larger size to be chilled, and this larger surface means a lot more water can be condensed and collected.
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Desiccant dehumidifiers work by using a 'desiccant' chemical to 'absorb' moisture from the air. A fan draws the wet air into the dehumidifier where it is passed over the desiccant. The desiccant moisture absorber is held on a slowly rotating wheel.
Part of the wheel not being used is then heated up so that the moisture drips out into the water tank.
It then reheats the air and pumps the dried air back into the room. This reduces the relative humidity in the atmosphere.
That's it!
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Next, read on to decide what size dehumidifier you need to buy.
We're not talking about physical size here, but the amount of moisture a dehumidifier can remove from the air in 24 hours. Domestic dehumidifiers come in different sizes - anywhere from 250ml up to around 20 litres for a domestic model. If it sounds like a lot, you'd be surprised at how much water the air actually contains. The smallest size capacity dehumidifier would be around 0.25 - 1.5 litres. These are useful for a small single room, boat or caravan. The capacity size you need depends on:
One thing to note is dehumidifier models are tested in ideal drying conditions and not in a real life environment. This means the true rate at which they extract water is probably slower than advertised. The rate also depends on environmental air temperature and humidity, so use it as a rough guide only. Increase in size if:
It's important to choose the right size because this impacts how much money you will need to spend buying a dehumidifier and the running costs of your unit.
Environment Conditions Less than 100 Square Feet 150 Square Feet 300 Square Feet 500 Square Feet 600 Square Feet Square Feet Mild Damp 250 ml /day 250 ml /day 1 L/day 10 L/day 12 L/day 14 L/day Moderate Damp 250 ml /day 500 ml / day 8 L/day 12 L/day 16 L/day 18 L/day Severe Damp 5 L /day 7 L/day 12 L/day 14 L/day 18 L/day 20 L/day Drenched 7 L /day 8 L/day 14 L/day 16 L/day 20 L/day 25 L/dayChoose the right size using this table. For peace of mind, we'd always recommend buying the largest dehumidifier you can for your space
Another feature of the dehumidifier you'll need to consider is the size of its water tank. This determines how quickly it fills up and how regularly you need to empty it.
Your dehumidifier's water tank collects the moisture it extracts from the air. The tank is usually smaller than its daily capacity.
If you buy the right size dehumidifier, you won't need to empty the tank that often. Generally though, the larger the tank, the better ' especially if you won't be around much to empty it.
Compressor and desiccant dehumidifiers also tend to have continuous drainage hoses too. This allows them to operate constantly without worrying about the tank getting full.
One factor that affects the ideal size of your dehumidifier is the difference between the two main types of dehumidifier ' compressor/refrigerant and desiccant. We explain which situations they're suited to, and compare the pros and cons of each.
Compressor dehumidifiers (also known as refrigerants) are usually designed to remove between 10L and 25L of moisture per day. These are ideal for dehumidifying areas of your home that are approximately room temperature and not too cold. In order for a refrigerant to work efficiently, the temperature in the room must be above the temperature of the coils in the dehumidifier. This means they will not work their best in a cold basement, garage, conservatory or caravan.
Ideal temperature range: 15-30°C Suboptimal performance: 10-15°C Poor performance: 5-15°C Will not work: Less than 5°CPros
Cons
Example use case: A three bedroom house with an average temperature of 21°C, using central heating in winter. You have a damp problem from household activities such as showering and clothes drying, and want to dry out the area very quickly.
Our best-selling compressor dehumidifiers:
20L Premium Dehumidifier with Special Laundry Mode
12L Low Energy Dehumidifier with Built-in Humidistat
Desiccants are recommended for colder environments like garages, conservatories and basements as they work at lower temperatures. Since they do not use a cold surface to condense and collect water like a compressor dehumidifier, they are much more efficient in cold environments. These tend to have a capacity of 7-12L.
Pros
Cons
Example use case: The temperature of the area is very low (below 10°C) such as a cold garage in winter. In this case, a desiccant dehumidifier with a smaller capacity than a compressor (8L versus 20L) will significantly outperform a larger capacity compressor dehumidifier.
Peltier models are suitable for smaller spaces and you should not expect them to work at the same efficiency as desiccant and compressor models. They have a smaller capacity of around 0.5L - 1.5L and work very well for the purpose they're designed for. Like compressor dehumidifiers, they will not work well in conditions below 15°C. Ideal temperature range: 15°C or above
Pros
Cons
Example use case: A small space bedroom that suffers from window condensation and a few spots of mildew are starting to appear. The temperature is quite warm and does not usually fall below 15°C.
You may be wondering, is a dehumidifier expensive to run?
Running your dehumidifier is likely to add anything between a few pounds to a couple of hundred pounds to your yearly electricity bill. It all depends on what type of dehumidifier you buy and how much you use it. For example, a peltier unit can cost as little as £5 per year to run, but of course they're not as powerful as a compressor. Compressors are costlier to run than desiccants. At the same time, dehumidifiers also save you a lot of money. The financial benefits of having one are:
Buying a dehumidifier saves on your electricity bill because:
As long as you use your dehumidifier efficiently and only when you need it, you're likely to save money on overall costs ' or at least, break roughly even. Here are approximate energy consumption amounts for the three different types of dehumidifier:
Type Power Rating* Per Hour Per Day ' Per Week Peltier - 500ml 23W £0.01 £0.04 £0.28 Compressor - 10L 230W £0.04 £0.48 £3.36 Desiccant - 8L 650W £0.10 £1.20 £8.40 * approximate power rating across the industry.
' based on 12 hours a day using the Average rate of 15.41p/kWh for a unit of electricity.
Investing in a dehumidifier has potential to save you money, but it's not a one-size-fits-all solution. You could end up wasting money if you don't use it correctly. Increasing energy efficiency reduces running costs, and it's better for the environment too. So what should you do to increase energy efficiency?
We recommend looking at the energy factor of your dehumidifier, which is the number of litres of water it removes from the air per kilowatt hour (kWh) of electricity used. The more it removes per kWh, the more efficient your unit is.
So you've found a dehumidifier that's the right size, and it's energy efficient to. It's now time to get down to the details. Dehumidifiers have a number of features that you should acquaint yourself with. If you're likely to need any of these features, be sure to choose a model that includes them.
For example, if you will not be around much to turn off the dehumidifier, automatic shut-off is essential. Similarly, if you want it to run when you're not there to empty the tank, such as in a basement, choose one that has continuous drainage.
Now you've got your dehumidifier, what's the best way to use it?
If you are drying out a room for the first time, you'll need to use your dehumidifier for longer. That could be anything from 8-hours, to 24-hours, to several days depending on the humidity of the area and capacity of your dehumidifier.
Once you have reached a target baseline humidity (eg 50% humidity), you will only need to use it for 2-4 hours per day to maintain that level. You will not necessarily need it at all times of the year. It depends on the conditions of your home. If your humidifier features an adjustable humidistat then as long as you set it to your desired humidity level, it should only turn on if the humidity level rises above your target.
And what is the best setting to have a dehumidifier on? Set it to your desired humidity, which should be between 30-50% in summer, and 30-40% in winter.
Clean the air vents with a soft brush to prevent dust build up.
A dehumidifier is for life, not just for Christmas. They need regular maintenance. Some things you will need to do are:
If you take care of your dehumidifier properly, it should last for a long time. Sometimes, though, things do go wrong.
As with all domestic products, the manufacturer or retailer should provide a warranty with your dehumidifier. If anything goes wrong within this period, they should repair or replace it free of charge.
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You might need to keep the proof of warranty, the receipt, and possibly the original packaging for the product. Put it somewhere safe so you'll be able to find when you need it.
Normally, the warranty is for 12 months. Sometimes you may have the option to purchase extended warranty, so you're covered for longer.
Many people can be put off buying a dehumidifier because they attribute it to being a large investment.
If you are worried about the cost and only need to dry a small space, mini dehumidifiers typically cost between £30-60. These are referred to as peltier or thermo-electric models and will extract anything from 200ml to 1 litre per day. They also use very little electricity - making them cheap to run.
Larger dehumidifiers that use either a compressor or desiccant typically cost between £100-£250. The more powerful they are, the more they tend to cost (though not always, which is why you need to do your research).
If you buy the right size dehumidifier for your needs, you will make the most of your budget. Remember, buying the right dehumidifier for you now will save you money through reducing damp, and drying/heating the air, all of which can be costly to deal with if left untreated
To conserve energy and lighten the load on your wallet, choose your dehumidifier on the basis of the size, dampness and temperature of the space you need to dry out.
It's important to note that dehumidifiers can pose a fire risk if faulty. Some models have been recalled due to overheating.
No models should be on the market that have been recalled, but beware of these models if you're thinking of buying one second hand.
Desiccants are hygroscopic materials that adsorb moisture from the air. They are often placed in packets made of kraft paper bags, Tyvek®, or custom-shaped and sewn bags. However, desiccants are also used in more advanced devices, such as in desiccators and breathing desiccators to dry an air or gas stream. Most manufactured desiccants look like small beads or caviar.
Desiccants are often used to create and maintain dry spaces, like the housing of an aerial camera, the inside of a shipping container or even a shoebox. In technical industries like aerospace, desiccant is used to protect electronics from corrosion and short circuiting, prevent sensor malfunctions, and stop fog or mold from forming on lenses. Some power generation plants use desiccants to dry gas streams and protect combustion engines from rust and volatile organic compounds (VoCs), such as siloxanes. On the other hand, residential or everyday applications of desiccant may include protecting stored photographs, books or albums.
Generally, keeping spaces dry prevents condensation, maintains low humidity levels. For these reasons, desiccant is used throughout many different industries to protect against moisture damage.
There are two main categories of desiccants: manufactured and natural. Manufactured desiccants include montmorillonite clay, silica gel, activated alumina, or molecular sieve, as well as many others. These are materials created in a lab to enhance their moisture adsorption and retention abilities. Naturally occurring desiccants include items such as salt and rice. However, silica gel is possibly the most common desiccant used in commercial, industrial, and technology industries.
Some desiccants, such as orange or blue silica gel, change color when saturated. This feature helps in knowing when to change out desiccant loads.
The job of any desiccant is to adsorb and trap moisture. The ultimate goal of desiccant is to stop moisture from causing rust, mold, corrosion, fogging, or any other moisture related damage.
In technical industries, this means preventing corrosion from causing short circuits in commercial grade electronics as well as military or space technologies.
The food industry will use desiccants or oxygen absorbers (which are not technically desiccants) in packaging to prevent moisture from ruining sundries during shipping.
The pharmaceutical industry will include desiccants ' usually oxygen absorbers but sometimes small silica gel packets ' in some medicine bottles to inhibit mold growth and preserve medicines.
Additionally, desiccants and oxygen absorbers have many uses around the home. For example, oxygen absorbers may be used to increase the shelf life of many dry goods. Desiccants may be used to protect stored items in boxes or containers, such as books, records, or photographs. Further, placing a desiccant packet or two into a gun case or cabinet will prevent rust from forming on firearms and ruining ammunition, which is a significant safety concern. Such cases are especially helpful for those living in humid environments or with homes featuring swamp coolers.
CAUTION: Some desiccants are toxic; for example, blue indicating silica gel. While silica gel itself is non-toxic, the cobalt chloride ' used in blue indicating silica gel ' is toxic. The cobalt chloride provides a visual indication of desiccant saturation-level via color change. Nevertheless, blue indicating desiccant should not be ingested or used to preserve foods.
For more about desiccants, see the info on the Desiccants, Desiccators, and Desiccant Breathers product pages, along with FAQs and more. If you have a specific question, contact AGM!
Desiccants neither expire nor break down over time. Rather, desiccants adsorb moisture from the air until they cannot hold any more.
If saturated desiccants are sufficiently heated for appropriate periods of time, they will release any held moisture and again resume adsorbing. That said, swelling, cracking, and reduced performance are all possible or eventual side effects of regenerating desiccant. The heat threshold varies with desiccant type, as does the time interval for heating, and both are very easy to accidentally overdo. For these reasons, and in combination with the low price of desiccants, it's often the choice of most to merely discard saturated desiccant. This is the case for many industrial applications as well as residential.
That said, AGM does offer a desiccant reactivator unit for silica gel desiccants.
CAUTION: If there are any hazardous chemicals adsorbed in the desiccant, it can be illegal to simply throw the desiccant away. Contact personnel at your local disposal facility for information.
If using non-indicating desiccant, consider using a humidity indicator card to easily monitor humidity levels.
Desiccant shelf life, especially in technical industries, is a key concern of engineers.
It's common for desiccant to be purchased in bulk and shelved for use over a long period of time. This method of purchasing usually comes with quantity price breaks and ensures that desiccant products are on-hand when they're needed.
However, as a material that automatically pulls moisture from ambient air, desiccants don't last forever. That's why desiccants are bagged and packed in sealed poly bags and metal or plastic containers. These materials prevent exposure to ambient air and feature low moisture vapor transmission rates (MVTRs) to stop desiccants from saturating prematurely.
In addition to packaging, maintaining proper storage conditions is key to ensuring a long desiccant shelf life and knowing that desiccants are ready when they're needed.
1-year.
AGM provides a shelf-life warranty of up to 1-year, provided that recommended storage conditions are met and maintained, and that packaging is not open or damaged. However, desiccant shelf life can be adjusted to accommodate greater durations if needed.
Contact AGM Engineers for further information
0° ' 90°F (-17°C ' 32°C) at 0% ' 75% Relative Humidity (RH)
AGM recommends a storage environment between 0° ' 90°F and 0% ' 75% relative humidity. In this environment, standard packaging should provide a desiccant shelf life of up to 1-year or more.
Bulk desiccant products are often shipped in unsealed poly bags inside of either metal cans or plastic pails. These materials feature low MVTRs in comparison to many other materials and play a significant role in a desiccant's shelf life.
Similar to bulk desiccants, assembled desiccator products are sealed in partially-evacuated barrier bags and overpacked into either metal cans or plastic pails. Additionally, sacrificial desiccant ' extra desiccant included to compensate for an expected level of saturation before use ' may be included, depending on the product, desired shelf life and storage conditions.
Remember, desiccants adsorb moisture automatically, meaning that any time they are exposed to ambient air, they will begin collecting water vapor. For this reason, it is important that desiccants remain in their packaging until it is time to use them.
Largely no. Storage conditions remain the same for all desiccants that AGM markets. However, there is potential to expand the temperature range for molecular sieve. Nevertheless, the standard range is preferable, even for molecular sieve, unless necessary.
The recommended storage environment range covers most locations and situations; however, there are always exceptions.
One common example is storage at elevated temperature (greater than 90°F). An elevated storage temperature may drive greater need for selecting between desiccant types. In this case, molecular sieve may be a preferred choice due to its performance at higher temperatures in comparison to clay or silica gel. However, each situation is unique and so needs case-by-case evaluation to determine the best alternative. Otherwise, desiccants may saturate or ruin before they're used.
For Analysis On Achieving A Target Shelf Life Contact AGM Engineering.
The operational lifespan of a desiccant is dependent upon usage conditions and there is little to be done to offset desiccant saturation here.
During storage, desiccant life may be extended through improvements to a container's seals or the desiccant packaging. However, in operational conditions, the environment is not always so controlled. For example, in air flight scenarios, pressure equalization for an enclosure may be necessary to protect it and its internal components from unsafe pressure differentials. To do so, it's common to install breather valves or breathing desiccators. However, moisture ingress occurs when the breathers open to relieve pressure, and the desiccant is there to adsorb this moisture.
Under these and similar conditions, extending the operational life of a desiccant load to a significant extent is normally not possible.
A close analysis of environmental conditions on the ground as well as of those needed inside of the device or enclosure in question is necessary. This analysis includes temperature range, humidity levels, pressure deltas, and others.
Sometimes it's necessary to extend this analysis to varying elevations. For example, in the aerospace industry, it's common for aerial mounted devices to require breathing desiccators. These breathing desiccators combine breather valves with desiccant cartridges to protect the device from dangerous pressure differentials as well as moisture ingress that occurs when the breather opens. In these and other cases, calculations are performed to analyze environmental and pressure conditions at altitude, which in turn provide estimations of desiccant operational lifespan.
Determining desiccant shelf life and operational lifespan is crucial to the successful operation of just about any hardware. However, the issue goes beyond 'how much desiccant do I need.'
While quantity does play a significant role; packaging, storage conditions, housing when in use, and frequency of exposure to ambient air are all of important variables as well. Without accounting for each properly, condensation can damage or ruin valuable electronics and optics assemblies, crash planes, or destroy trade goods.
Understand How Long Your Desiccant Will Last
Quantities of desiccant are measured in units. One unit of desiccant is defined in MIL-D-E as 'the amount of desiccant that will absorb at least 3.0g of water vapor at 20% relative humidity and at least 6.0g of water vapor at 40% relative humidity at 77°F (25°C).'
Such a definition means that the quantity of one unit of desiccant changes with each type. However, as a general best practice, it is recommended to use 1.2 units of desiccant per cubic foot of air volume.
To help make quick estimates, AGM's Desiccant Calculator provides unit quantity amounts based on an internal volume measurement. The tool is free to use and provides unit estimates for three common desiccants: Silica Gel, Molecular Sieve, and Clay.
If your project requires specific attention, contact AGM for greater analysis.
For most applications, such as those around the house, a few packets of silica gel will do the job. For the more ambitious, the general MIL-SPEC calculation and calculator will suffice just fine. For the professional, however, it can be a little more complicated.
Start with the following checklist:
Once the above questions have been answered (or even if there are few unknowns), you'll need to contact AGM. AGM Engineering will work with you to find and provide either an off the shelf or a custom solution that ensures the safety and longevity of your project.
Start by comparing the properties and capabilities of different desiccants. Pay close attention to project goals and needs as choosing an appropriate desiccant is determined by them. For more detailed information about desiccant adsorption and capacity rates, contact AGM.
Figures 1 and Figure 2 illustrate the adsorption rates (how quickly water vapor is adsorbed) and the adsorption capacities (how much water vapor is adsorbed to reach equilibrium at various relative humidity readings) of silica gel, clay, and molecular sieve (synthetic zeolite) desiccants.
Figure 1
Figure 2
Perhaps the most commonly used desiccant, silica gel, is an amorphous form of silica manufactured from sodium silicate and sulfuric acid. Its interconnected pore structure forms a vast surface area that will attract and hold water by adsorption and capillary condensation, allowing silica gel to adsorb about 40% of its weight in water. Silica gel is extremely efficient at temperatures below 77°F (25°C) (see Figure 1 and Figure 2 above), but will lose its adsorption capacity as temperatures begin to rise, much like clay (Table 2). Much of silica gel's popularity is due to its noncorrosive and non-toxic nature; some grades have received U.S. government approval for use in food and drug packaging.
Molecular sieve contains a uniform network of crystalline pores and empty adsorption cavities, which give it an internal adsorptive surface area of 700 to 800 m^2. Because of its uniform structure, molecular sieve will not desorb moisture into the package as readily as silica gel or clay as temperatures rise. Being synthetic rather than naturally occurring, molecular sieve is higher in cost per unit, but due to its extremely large range of adsorptive capabilities, it is often be the best value.
Montmorillonite clay is a naturally occurring adsorbent created by the controlled drying of magnesium aluminum silicate of the sub bentonite type. This clay will successfully regenerate for repeated use at very low temperatures without substantial deterioration or swelling. However, this property causes clay desiccant to desorb moisture readily back into the container as temperatures rise. Clay is inexpensive and highly effective within normal temperature and relative humidity ranges.
Activated alumina excels at drying gases; such as compressed air and natural gas. However, it is often used to filter impurities from liquids, such as in water purifiers, oil transformers, and refrigerants. Activated alumina is manufactured from synthetically produced aluminum oxide (Al2O3), which provides the desiccant with a highly porous, large surface area greater than 300 m^2/g. Additionally, activated alumina may be regenerated for extended use in some scenarios.
Cover Stock: An important factor in the efficiency of any desiccant is the bag material (cover stock). The cover stock must allow the desiccant to do its job without harming the product. This means maintaining an acceptable adsorption rate and conforming to the product's dusting requirements.
One common cover stock is a spunbonded, high-density, polyethylene material known commercially as Tyvek®. Created by DuPont, Tyvek® resembles a waxy paper with good whiteness and exceptional strength, maintaining its size and shape with changes in humidity. Tyvek® will not allow dust to be released into the container, is resistant to staining, mold, and mildew growth, and will not reduce adsorption rate. However, because of its special properties, Tyvek® is more expensive than conventional cover stock materials.
AGM Container Controls, Inc. has an entire division dedicated to desiccants and their functionality. AGM also offers a moisture analysis service which accounts for a wide range of variables in order to prescribe desiccant combinations for maintaining targeted humidity level goals over any length of time for highly sensitive equipment. If at any time you have questions or concerns, please contact us at 520-391- or via and we will be happy to assist you.
Manufactured and naturally occurring hygroscopic materials that adsorb moisture from the air in order to protect equipment and items.
Moisture damage causes billions of dollars in damage to consumer goods per year and has been the inciting cause of plane wrecks, as well as the failure of electronics and optics equipment throughout various technical industries. As a result, desiccants protect everything from stored household items to NASA equipment.
No, desiccant does not expire and neither do they break down. Rather, desiccant continues to adsorb moisture to a point where it cannot hold any more, in which case it needs to be discarded or regenerated.
Desiccant shelf life, when stored in its original protective packaging, is typically 1-5 years. The shelf life depends upon the level of its protective packaging.
In its protective packaging, desiccant can be stored in conditions of 0° ' 90°F (-17°C ' 32°C) at 0% ' 75% Relative Humidity (RH). If removed from its protective packaging, desiccant should be placed into use immediately.
Are you interested in learning more about Desiccant Dehumidifier Supplier? Contact us today to secure an expert consultation!
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