Our preferred dehumidifier in 2018
After hundreds of hours of research, testing and in-depth analysis, here is our model proposal for 2018. These are the best dehumidifiers we have tested so far. Just like we interviewed the study of weight loss program, after a lot of time, interested can take a look at the process to read this article:best weight loss pills
In short, the Frigidaire FFAD7033R1 is the best dehumidifier we tested when we wrote this guide in early 2018. It is definitely the best dehumidifier on the market today. Why is that?
It removes moisture quickly – we perform two different tests to determine the degree and speed of dehumidification in a real-world environment. In the first test, we measured the time required for the dehumidifier to reduce the indoor humidity from 90% to 40% relative humidity (RH). In the second test, we measured how long it took to reduce room humidity from 80% to 50% RH. The FFAD7033R1 is able to reduce room humidity from 80% to 50% RH than any other dehumidifier we tested. This is the second fastest drop in room humidity from 90% to 40% RH.。
It’s quiet – the FFAD7033R1 has two things to solve because it produces as little noise as possible. First, it does not produce any audible compressor noise. Have you heard the compressor kick in your refrigerator? If you are very close to your refrigerator and / or if you have an old refrigerator, you are likely to hear its compressor humming. The dehumidifier also has a compressor, which can also produce the same hum that the refrigerator compressor can produce. The compressor of the FFAD7033R1 did not produce any audible noise during the test. Many of the other dehumidifiers we tested could not say this.
It has been carefully constructed – we have spent a lot of time gaining practical experience on many different dehumidifiers. In terms of building quality and quality of building materials, the FFAD7033R1 is just one of the other dehumidifiers we have tested so far. In fact, when comparing the FFAD7033R1 with other dehumidifiers, how much difference in construction quality. Directly placed next to other popular dehumidifiers, even for those with insufficient experience with dehumidifiers, the FFAD7033R1 is clearly a better quality appliance.
The FFAD7033R1 does a better job than any other dehumidifier we tested. It has won our highest recommendation and is the best dehumidifier on the market today.
Please note that the 50 and 30 models of this particular model are also available for purchase. These two units are identical to the 70-type off-set except for capacity and size. They have exactly the same control panel, the same exhaust position, the same manufacturing quality and more. Of course, we don’t recommend these versions over 70 units, but if you buy smaller units, you can be sure they provide similar noise output, the exact same manufacturing quality, and the same size as the 70-unit unit. Partial advantage, but small capacity.
The Frigidaire FFAD7033R1 is the best dehumidifier we have tested so far, but its price and availability are often such that some consumers may not be able to access it. The Keystone KSTAD70B is a more affordable alternative.
Here are the reasons why KSTAD70B became the second choice:
It is very energy efficient – the KSTAD70B is one of the 70 most powerful dehumidifiers we tested, with a test power consumption of only 590 watts.
It’s quiet – this Keystone dehumidifier is one of the quietest dehumidifiers in its size class. We measured the noise output (in dB) of all dehumidifiers we tested. The KSTAD70B is one of the quietest 70-type dehumidifiers we have tested so far.
It dehumidifies quickly – it does not dehumidify as fast as the Frigidaire FFAD7033R1, but its size rating (type 70 off) is still faster than the average. As mentioned above, we measured the dehumidification rate of the dehumidifier in two different tests. In these tests, KSTAD70B did not perform as well as FFAD7033R1, but its performance was still above average.
Based on the fact that the two models look identical (they all have the same control panel and internal structure) and due to the lack of usability of the “B” model, we currently recommend the Keystone KSTAD70C as the best budget dehumidifier option for 2018.
Why can you trust our advice?
So far, we have personally tested more than 50 different dehumidifiers. Many other reviewers make recommendations based on the manufacturer’s specifications. These specifications list performance data based on tests conducted in a highly controlled environment (ie, moisture removal rate and noise output) that maximizes the performance of the dehumidifier and achieves the desired results. Our tests simulate real-world environments and conditions, and these are not always the ideal choices to determine the actual effect of each dehumidifier we tested in the real world. We rigorously test each unit to determine how fast it removes moisture, how much noise is generated, how much energy is used, and the accuracy of the hygrometer’s built-in hygrometer (for reading humidity levels) is actually in a typical home environment. . This means that our test data is usually completely different from the data in the manufacturer’s instructions.
In addition to the above tests, we also need time to evaluate the build quality, functionality, portability, adjustability, versatility, and usage of each unit. Finally, we check the warranty, price and consumer feedback and compare it to other dehumidifiers we tested. This is how we determine the best dehumidifier in each category.
There are three main types – dehumidifiers
- Thermoelectric dehumidifier
- Desiccant dehumidifier
- Compressor based dehumidifier
Compressor based full size dehumidifiers (such as those in the above figures) are capable of removing more than 10 gallons of water per day from the air. Most thermoelectric and desiccant devices remove only a few ounces per day.
At any humidity, compressor-based equipment can be used to dehumidify any (reasonable) size space. Most thermoelectric and drying units can only be used to dehumidify small spaces (eg closets) and can only be used if the humidity level of the space is not too high.
Because in most cases, thermoelectric and desiccant devices are not suitable for most people at all, we won’t discuss them in this guide (for information on these dehumidifiers, see our Thermoelectric and Dehumidifier Dehumidifier Guide).
Key steps before purchasing a dehumidifier
For a while, we will first find our top dehumidifier selection (the advice of our best dehumidifier), but before we do it, we need to first review a very important concept – the ability of the dehumidifier.
A clear understanding of this concept is absolutely critical to determining which type of dehumidifier you need to purchase.
As we mentioned earlier, compressor-based dehumidifiers can remove more than 10 gallons of water per day from the air. But not all of them can remove the entire 10 gallons. Some people can only remove about 6 gallons per day, while others can only remove 4 gallons per day.
How much water (moisture) the dehumidifier removes from the air every day is called the capacity of the dehumidifier. Therefore, a dehumidifier that can remove 10 gallons of water per day from the air is said to have a capacity of 10 gallons. Or what?
Dehumidifier manufacturers do not use gallons to specify the capacity of their dehumidifiers. Its volume is too loud. Instead, they use pints. Of course, a type of off is only one-eighth of a gallon.
Therefore, the dehumidifier we talked about with a capacity of up to 10 gallons per day is referred to as the 70-type dehumidifier. Type 70 is actually a little less than 10 gallons. Specifically, it is equal to 8.75 gallons.
Which capacity dehumidifier should you buy?
In most other Dehumidifier Buyer’s Guides, the author of the guide will indicate your size chart to help you determine the capacity of the dehumidifier you need to purchase. The most popular size chart is given by the Household Appliance Manufacturers Association AHAM.
AHAM tests and verifies the dehumidification rate and energy efficiency of most dehumidifiers in the United States (please note that they did not actually check and compare the dehumidifiers, they just verified the manufacturer’s instructions). Because they conduct such testing and verification, they are considered the authority of the dehumidifier.
Therefore, most consumer publications do not hesitate to quote their size sheets. The AHAM chart we are discussing is reproduced in the table below.
To use this chart, please follow these steps:
- Choose the humidity of the space you need to dehumidify
- Select the square foot of the space
- Match the selected wet line to the selected square foot bar – this gives the recommended capacity of the dehumidifier to purchase
For example, suppose your bathroom is very large, 1000 square feet – the chart suggests you buy a 17 dehumidifier.
|Condition||Area square inch (corresponding model)
|very wet + ||12||17||22||27||32|
In addition, the chart has the following definition:
Unlike most other consumer product publications, we do not recommend using the chart above to help you determine which capacity dehumidifier to purchase.
Why do we not agree to use this chart? See the 8 reasons below:
1.The chart cannot be found anywhere on the AHAM official website or the AHAM official test specification website. Although many different consumer publications refer to the above chart and the source code as AHAM, the fact that AHAM is indeed source code cannot be verified because the chart is not actually present because it has been copied from the same publication. Place on any AHAM website.
2.There are only two of the capabilities listed in the chart – 32 of the second and third rows and 30 of the bottom row – corresponding to the actual capacity of the dehumidifier you can purchase in the store. Read the first row of the form, no 10, 14, 18, 22 or 26 dehumidifiers can be purchased online or at any location in the store.
3.The chart has a limited range, starting at 500 square feet and ending at 2500 square feet. What if you need less than 500 square feet of dehumidification? If it is greater than 2,500 square feet? The chart failed to make recommendations for space beyond the given range.
4.The chart does not take into account the height of the space that needs to be dehumidified. Rooms with higher ceilings have more air than rooms with lower ceilings – the chart above does not take this into account. The recommendation based on volume (measured in cubic feet) is more appropriate than the space area that requires dehumidification.
5.The chart does not consider the CFM of the dehumidifier CFM – the dehumidifier intake fan (the cubic feet of air that the fan enters the dehumidifier every minute). We evaluated dehumidifiers with higher CFM fans much higher than dehumidifiers with lower CFM fans. why? Because only half of the drying process of dehumidifying a certain volume of air involves the process of actually removing moisture from the interior of the dehumidifier. The other half involves drawing air into the dehumidifier to dehumidify it. Higher CFM fans can draw more air from a greater distance around the dehumidifier. This is especially important if you want to dehumidify large spaces. The above chart does not take into account that a small capacity dehumidifier with a higher CFM fan may outperform a larger capacity dehumidifier with a lower CFM fan in some cases.
6.The chart is likely to be extrapolated based on test data obtained in a highly controlled environment. This may not be recommended for experiments in actual environments based on actual conditions (moderately humid, very humid, humid, very humid).
How do dehumidifier manufacturers claim that their Type 70 dehumidifier can actually remove Type 70 dehydration points every day? The manufacturer voluntarily sends it to AHAM for testing. AHAM then measures the dehumidification rate of the dehumidifier in the laboratory, which is set to exactly 60% of relative humidity (RH) and 80oF.
7.This figure contradicts the manufacturer’s recommendations.See, for example, the Friedrich Dehumidifier manual. It is recommended to use a Type 70 dehumidifier in a 1000 to 2000 square foot “wet” or “very wet” space, which is exactly the same as the recommended size for the 37 pints of the above size chart in the same size space.
8.This figure contradicts our own research and testing.For example, the chart suggests using a 44 pint dehumidifier in a 2,500 square foot “very wet” space. Our experience with all dehumidifiers tested to date has led us to believe that a 44 pint dehumidifier (which does not actually exist, but not in the sense of the problem) has little enough capacity to remove the wet Large space under these conditions.
Dehumidifier – our advice
Obviously, we think there are many defects in the AHAM dehumidifier size chart. And, because of this, we strongly recommend that you do not use it to determine which size dehumidifier you should purchase. So what do we recommend? Our advice is just the following:
Buy a dehumidifier that you can afford for maximum capacity.
In other words, we recommend that you purchase a Type 70 Dehumidifier, the largest capacity consumer dehumidifier you can purchase, no matter what size or humidity you need to dehumidify.
If you have a small, not too wet space – for example, if you live in an apartment of about 1000 square feet – you can definitely use the 50 or off 30 models. However, you will pay the price. What is the cost of this? We explain below.
Why do you recommend it to your dehumidifier?
We recommend that you purchase the maximum capacity (for the consumer, this means the 70-type off), and you can afford the dehumidifier based on the following very simple facts:
Type 70 dehumidifiers are faster than 50 or 30 models
This may sound like it was obvious in our statement here, but I really thought of this statement – a Type 70 dehumidifier dehumidified faster.
It is easy to correlate the capacity of the Type 70 dehumidifier with a certain amount of water – the amount of water that the dehumidifier removes from the air every day. The truth is that such a connection is not correct. The Type 70 Dehumidifier is of course capable of removing a large amount of Type 70 dewatered water from humid air every day.
However, more importantly, the capacity of the dehumidifier is related to the speed of dehumidification. The Model 70 Dehumidifier removes any given amount of moisture at a faster rate in any given time, not just the 70-type – not just 24 hours.
Type 70 – 34.25 hours
Type 50 – 48.08 hours
Type 30 – 80 hours
Obviously, if you set a certain amount of water, the 70-type dehumidifier can remove water faster than a small-capacity dehumidifier.
Another way to look at it is the percentage:
To remove any given amount of moisture from any given space, the Type 70 Dehumidifier will be able to remove moisture by 40% faster than a Type 50 dehumidifier. Compared with the 30 dehumidifier? Speed up to 134%!
Due to its faster dehumidification speed, the Type 70 dehumidifier requires less time to run than a small capacity dehumidifier to dehumidify any size space under any circumstances.
The very important reasons are as follows, which is why we strongly recommend the 70 model so strongly:
It makes the Type 70 dehumidifier more energy efficient than a small capacity unit.Type 70 dehumidifiers draw more energy per unit time than small capacity units, but they absorb this energy in less time. We have completed the mathematics calculations, and the end result is that, under real-world conditions, the 70-type dehumidifier is generally more energy efficient than a small-capacity dehumidifier over time. You should be able to not only recover the initial cost difference between Type 70 and Type 50 or Type 30, but also save energy costs.
It makes the Model 70 dehumidifier more reliable than the small capacity unit.This may be the biggest reason we recommend the 70-type unit. You see, every minute your dehumidifier runs, it puts pressure on its internal components (compressors, condensers, etc.). Since the Type 70 dehumidifier runs shorter than a small capacity device to dehumidify any given amount of air, the stress on its internal components takes much less time. This makes them last much longer than small capacity units.
Think about it this way: The life of a dehumidifier doesn’t depend on how long you have it, but how many hours you use it. Mathematics is simple. Units with smaller capacity have much longer run times than large units, so that the same space can be dehumidified at the same humidity.