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“Over time, high humidity levels can eat through your walls.”
A dehumidifier is an HVAC device that is fast becoming one of the most important parts of maintaining a healthy house. People started to realize that mold and mildew growth isn’t only nasty (in addition to allergies and pest problems); it can also threaten the structural integrity of a $500,000 worth house.
From the structural standpoint, having 40% relative humidity is ideal, according to HVAC.com.
In the summer, the relative humidity inside the house can reach 80% or even 90%. To bring that down you need a whole-house dehumidifier. This is more often than not a seasonal dehumidifier only for the humid summer season.
The weakest part of the house against high humidity is often the basement. Some basements can have an above 70% humidity levels throughout the year. To prevent the mold build-up and, quite frankly, the rotting of your walls, having the best dehumidifier for basements is a smart idea.
At LearnMetrics, we compared the best dehumidifiers based purely on specifications. We even made a comparison of the best ones:
However, we believe it’s integral for everybody buying a whole-house dehumidifier or a dehumidifier for the basement to have a basic understanding of what to look for when you’re buying a dehumidifier.
With dehumidifiers, you can’t really start with ‘This is the superb best dehumidifier in 2020 that will work best for everybody’. Every house or basement is different. Knowing a thing or two about dehumidifiers will save you a lot of trouble down the road.
Believe me, a quick introduction that follows will tell you everything you need to know to buy the right dehumidifier for your house. We’ll explain how does a dehumidifier work first.
Before looking at which dehumidifiers are the best in 2020, we’ll go through an essential dehumidifier buying guide that will point out 4 key things without which you can’t really make decisions on which dehumidifier will work best for you.
Here’s the quick summary of specifications the best dehumidifier should have:
- Capacity: For whole-house or basement dehumidification, a 70-pint dehumidifier will work for most people.
- Energy-efficiency: Opt for the Energy Factor Value of 1.5 or above. This will save you a lot on electricity bills.
- Draining: Nobody wants to empty the water bucket every few hours. Attach a hose for continuous gravity drainage or, even better, choose a dehumidifier with a pump (they are rare, however).
- Noise levels: Dehumidifiers are quieter than portable air conditioners. Focus on the ones with the decibel levels of below 55 dB.
You will find the extensive guide that explains the dehumidifier’s specifications and other ins and outs below the comparison table of the best dehumidifiers in 2020.
How Does A Dehumidifier Work?
Every dehumidifier follows the same 1-2 principle:
- Take moisture of the air: Fan in the moist air in the house, run it over a cold coil (Evaporator) which condenses moisture out of that air and collect thewater via drip tray into a water tank. We end up with a cold but dry air.
- Heat the dry air back up: Run the cold but dry air over a hot coil to bring it up to room temperature. Fan the dry air back in the house.
The exploding-photo of a dehumidifier here depicts all the vital part of a dehumidifier:
The way that dehumidifier works is by being a refrigerator and a heater at the same time. Here are the 6 steps of the whole air dehumidification process:
- The compressor propels the fan and the flow of the refrigerant.
- The fan draws a humid air into the dehumidifier via an air inlet.
- The humid air is met with a series of very cold coils (basically, a refrigerator). There the water from the air is condensed on the cold coils.
- The drip tray gathers the water in the water tank. The convenience of removing water from the dehumidifier’s water tank will be one of the key parts of the buying guide below.
- The now dry cold air will run over hot coils to warm up (basically, a heater).
- The same fan that absorbs the humid air into the dehumidifier will now propel the dry air out.
The only difference between the best and the worst dehumidifiers is how well they have perfected this process. From capacity and energy-efficiency to the noise levels, all these specifications are simply based on the well-designed fridge-heater operation we see here.
Quick Dehumidifier Buying Guide
Picking the best dehumidifier for your house or basement can be confusing at first. You have the 30, 50 and 70-pint whole-house and portable dehumidifiers. You have the Frigidaire, HiSense, hOmeLabs devices with 3,000 sq ft, 4,000 sq ft, 50 dBa, Energy Star-rated descriptions, and continuous gravity or pump drains and so on.
The purpose of this quick dehumidifier guide is to make the sense of all these specifications is 5 minutes or less (you’ll find the longer dehumidifiers FAQs below the best dehumidifiers reviews).
You ready? Ok, let’s dive right in:
Capacity (30-, 50-, 70-Pint)
Let’s start with the capacity of the dehumidifier. You can get a small 30-pint, a medium 50-pint, or the strongest residential 70-pint dehumidifier. This just tells you the maximum amount of water (in pints per day) a dehumidifier can squeeze out of your air per day.
A pint is a weird unit; it amounts to 1/8 of a gallon. In short, the big 70-pint dehumidifier can absorb almost 9 gallons of water out of the house or basement air per day.
How big dehumidifier you should buy?
Here is a quick look at the Association Of Home Appliance Manufacturers (AHAM for short) table. You need to know how many sq ft of space you have and how humid those spaces are:
AHAM Dehumidifier Capacity Table
|Humidity Levels:||300 sq ft space||500 sq ft space||800 sq ft space||1,200 sq ft space|
|30 Pint||45 Pint||60 Pint||70 Pint|
|30 Pint||45 Pint||60 Pint||70 Pint|
on walls or floor)
|40 Pint||50 Pint||65 Pint||80 Pint|
(Seepage on walls
and flor, maybe
even visible mold)
|45 Pint||60 Pint||70 Pint||90 Pint|
For example, if you have a 500 sq ft basement with medium humidity (70%-80%), you would need a 50-pint dehumidifier. That’s a ballpark figure.
Note that some producers might be throwing around numbers like 3,000 sq ft or 4,500 sq ft. Long story short, it’s best to ignore those ‘calculations’. Here’s the real-life advice:
Always buy a big bigger dehumidifier. 70-pint ones are perfect for a majority of houses or basements.
Energy-Efficiency Factor (Energy Star Label)
Dehumidifiers can run 24 hours per day for months on end. Obviously, they run on electricity and everybody wants the most dehumidifying effect for their electricity buck.
Energy-efficiency of dehumidifiers is expressed by ‘Energy Factor Value’ or EEV for short, measured in liters per kilowatt-hour (L/kWh). By knowing the capacity and power of a dehumidifier, we can (with a bit of unit conversion) calculate the energy factor for every dehumidifier.
Here’s a quick calculation of how much will running an EEV 2.0 (very energy-efficient) dehumidifier cost versus an EEV 1.0 (very energy-inefficient) dehumidifier. Let’s presume we run them both of them have a 70-pint capacity, we run them for 1,000 hours ( and the average cost of a kilowatt-hour (kWh) is 13.19 cents.
|Energy-Efficient Dehumidifier (EEV = 2.00)||Energy-Inefficient Dehumidifier (EEV = 1.00)|
|(Yearly) Electricity cost: $91,01||(Yearly) Electricity cost: $182,02|
It’s quite evident that it makes sense to shot for the more efficient dehumidifiers. Here the difference in electricity bill can be almost $100/year.
In the list of the best dehumidifiers you’ll find further on, we’ve calculated the energy factors and took them into account when specifying which ones are the best. All of them have the Energy-Star label for high energy efficiency.
Opt for dehumidifiers with high energy-efficiency to drive down the electricity costs. Dehumidifiers with the EEV of 1.5 or above are ideal.
Type Of Draining
Here the thing. You’ll probably spend 20% of time setting the humidifier up, using the pre-programmable 12h or 24h cycles.
The other 80% of you dealing with an air dehumidifier will, if you make a bad choice, involve emptying the water tank.
Here’s how the accumulated water can leave your dehumidifier:
- Continuous gravity drainage. Water just flows out with the help of gravity via a drain pump (not appropriate for basements).
- Pumping it out. Dehumidifiers with pumps are the best; they pump out the water and need no manual handling.
- You emptying the bucket. You literally have to detach the water tank and empty it manually and reattach it afterward.
Honestly, the #3 way of emptying the bucket manually is what you want to avoid. However, most of the standard dehumidifiers don’t have gravity drainage or, even better, a pump. Here’s one obvious advice to follow when picking the best dehumidifier for yourself:
Spare yourself some work and a bit of worry by not buying a ’empty-the-water-bucket-yourself’ kind of dehumidifier.
How Noisy Is The Dehumidifier?
Dehumidifiers are one of the quieter HVAC devices. There are three things that generate noise of a dehumidifier:
- Moving air.
The advances in the motor and compressor technology have enabled the creation of sub-60 dB dehumidifiers. The best ones will have noise levels below 55 dB.
To get an idea of how loud that actually is (actually, it’s super quiet), you can see a loudness comparison of different sounds in our lives here:
Useful Features You Might Want
Modern dehumidifiers can be very convenient. You know how the additional equipment when buying a car involves seat heaters and how nice of addition they are?
Well, dehumidifiers have a range of extra features to ease your dealing with them. These include:
- Automatic Humidistat (almost impossible to get). The most useful feature; you just set the target humidity levels of 40% and the humidistat will drive the dehumidifier to pump out the moisture until it hits 40%. Even better, when the humidity levels will start rising again to let’s say 45%, the humidistat will automatically power up the dehumidifier to maintain the 40% relative humidity levels. This, in turn, also makes for the most optimum energy-efficiency.
- Automatic Restart. If your house loses contact with the power supply (power outage, short circuit failure, everything that is powered by electricity, including the dehumidifier, will shut down. Dehumidifiers with automatic restart will start operating the second the power is back on; the one’s without the restart function won’t.
- Programmable Timer. You can set for the dehumidifier to run for 12 or 24 hours.
Now when you’re up to speed, let’s look at the 7 dehumidifiers that excel the most at these specs:
List Of 7 Best Whole-House And Basement Dehumidifiers
#1 MIDEA MAD50C1ZWS (Best Overall Dehumidifier With 320 CFM)
Midea model MAD50C1ZWS is an exceptional dehumidifier because it has crazy-high airflow. That airflow is very important when it comes to lowering humidity levels at lower temperatures.
The big MAD50C1ZWS is thus perfect dehumidifier for basements. Basements are known to be a little colder than other parts of the house. The extraction of humidity is harder at low temperatures; that’s why you need to add sheer airflow in order for the dehumidifier to be quicker and more effective.
An airflow of an average dehumidifier is about 150-200 CFM. The Midea MAD50C1ZWS is capable of pumping in and out the maximum of 320 cubic meters of air per hour (CFM). That’s about double the airflow capability compares to a standard dehumidifier.
All that capability should come with a lot of energy waste and noise, right? Well, the Midea engineers have managed to create a powerful 70-pint dehumidifier with an energy factor of 2.00 and noise levels below 50 dB (maximum is 49 dB, to be exact).
Those energy-efficiency and noise specs are even better than the #1 Frigidaire dehumidifier:
Given its specs, it’s obvious this is not a summer-only whole-house dehumidifier. Rather, it’s best positioned in the basement.
The only problem with that is the lack of a water pump. Obviously, dehumidifiers with pumps are rare enough. Nonetheless, if you place the MAD50C1ZWS in the basement, you really don’t have an option to attach a hose and use continuous gravity drainage. You have to empty the water bucket manually.
All in all, the Midea dehumidifier has great HVAC specs. It’s a solid choice especially for people who want to lower the humidity of their basements.
#2 LG PuriCare UD701KOG3 (Best LG Dehumidifier)
LG is probably the most well-known company that makes a wide range of HVAC devices. Luckily, these include a dehumidifier; the LG PuriCare UD701KOG3, to be exact.
With the UD701KOG3 70-pint model they took the responsible and safe route. The LG’s PureCare has a great 1.85 EEV energy efficiency, above-average 1.7-gallon water bucket size and an airflow of 177 CFM.
It sounds like a solid 70-pint dehumidifier. What is also great about LG is that they give you a detailed look at the noise levels of every device. The UD701KOG3 has the minimum decibel levels of 46 dB, a medium level of 49 dB and a maximum level of 52 dB. This additional insight is quite reassuring that you’ll get a quiet dehumidifier in LG’s UD701KOG3.
What everybody notices first, however, is the color. LG decided to go with black:
It’s obvious that the LG went the safe route with the UD701KOG3. To create a reliable dehumidifier, they have pumped up the specs a bit but didn’t go too far.
There is an additional advantage of having a no-fuss dehumidifier with above-average HVAC specs. It’s not as expensive as you would expect. LG devices can be a bit pricy because, well, they are a good and reputable brand.
All in all, LG’s UD701KOG3 is probably the safest choice of a dehumidifier you will see. Not pumping up the specs too far is not a bad thing when you’re looking for reliability.
#3 Frigidaire FAD704DWD (Most Popular Frigidaire Dehumidifier With 13.000+ Reviews)
We don’t have to repeat how an HVAC device with the Frigidaire logo on it is reliable, right? With the FAD704DWD model, Frigidaire added convenience to its great specs and reliable 50-pint dehumidifier.
Note: You’ll that the added convenience makes this the most popular Frigidaire dehumidifier. It has gathered more than 13.000 reviews on Amazon; most of them are quite positive.
Drainage is usually one of the key parts of how well we like our dehumidifiers. If you can, you can attach a standard 5/8” hose and use gravity to get that water out. However, if you’re in the basement below the ground, you can’t really use gravity, right? That’s where a big bucket comes in handy.
The 2.0-gallon bucket is the biggest bucket that will go into an air dehumidifier and, luckily, Frigidaire decided to build it in their 50-pint FAD704DWD model. That will require you to manually empty the bucket much less frequently.
The FAD704DWD model is also energy very efficient. Frigidaire manages to achieve that high 1.85 energy factor for the majority of their dehumidifiers. The secret is in the efficiency of the dehumidifier motor.
However, the compressor is another story. The compressor is usually where the most noise is produced. Frigidaire FAD704DWD produces the maximum noise levels of 53.4 dB which is about average. The majority of devices on this best dehumidifier list are below that. So that’s not an ideal noise level.
Nonetheless, the FAD704DWD is one of the more affordable Frigidaire dehumidifiers and certainly the most popular one.
#4 Vremi B07JMZJX4B ‘Moisture Maniac’ (Highest Rated Dehumidifier With 4.8 Average Rating)
I have yet to see a dehumidifier that would come close to a 4.8 average rating on Amazon after 3,000+ reviews. That’s exactly what Vremi B07JMZJX4B has managed to achieve. It’s ecstatic, to say the least.
Vremi is like an Apple. They have developed a single dehumidifier (like Apple develops a single iPhone, not 20 different models like Samsung), budded it the ‘Moisture Maniac’ and have put everything they’ve got into it.
The difference between Vremi 50-pint dehumidifier and other dehumidifiers is that Vremi decided to develop a truly user-friendly device. That means it comes with those seamless built-in wheels, have handles for moving it around.
Add the quiet purr it produces (like a cat) and it’s not difficult to why everybody loves the B07JMZJX4B model. Especially if it looks like this:
Obviously, here at LearnMetrics we’re all about the metrics. However, the specification sheet is not really available for Vremi B07JMZJX4B model.
In short, there are no numbers (except the 1.8-gallon bucket size which is nice) to base this review on and compare the dehumidifier to others.
Nonetheless, with so many Vremi B07JMZJX4B reviews readily available, we can see a pattern there. People call it ‘quiet’, ‘easy to use’ and ‘nice looking’. Those are all good metrics. The bad ones involve a few breakdowns which are a standard when it comes to dehumidifiers.
The most important metric – the energy-efficiency expressed with energy factor or energy-efficiency value (EEV) – is not readily available. And that’s exactly a metric that people don’t include in their review because how can you judge energy-efficiency without some kind of measurements that obviously no one does.
In spite of this, Vremi B07JMZJX4B 50-pint dehumidifier fully deserves the praises going its way. It’s a capable and modern-looking dehumidifier that everybody can install with ease.
#5 Ivation IVALDH70PW Dehumidifier
Ivation’s IVALDH70PW model is a very compact 70-pint dehumidifier. Despite weighing less than 40 pounds, this dehumidifier packs quite a punch.
Even better, with the energy factor of this 70-pint device is 1.85, it delivers all those humidity-reducing power at a very energy-efficient rate.
The bucket size, however, is a bit smaller. The built-in bucket has 1.3-gallon volume and can’t be expanded. If you use it as a whole-house dehumidifier, however, you can simply attach a 5/8” hose and channel the water from the dehumidified air in your garden.
As far as energy efficiency goes, the Ivation IVALDH70PW has the EnergyStar label and the EEV of 1.85. That means that it will make the most out of the electricity you power it with and will drive down the electricity costs.
The noise levels appear to be quite low; however, we don’t really have decibel level specs to confirm.
All in all, a simple and compact device. Ivation IVALDH70PW is a good dehumidifier if you have the ability to use the continuous gravity drainage via a hose.
#6 TOSOT GDN30AZ (Best Small Dehumidifier)
Up till now, we’ve talked about the bigger 50-pint and 70-pint dehumidifiers. TOSOT GDN30AZ-A3EBA2C is the best smallest 30-pint dehumidifier and that’s saying a lot.
Obviously, the big brands focus on their bigger devices. TOSOT, a small company, went out to make the best small dehumidifier and they’ve done a marvelous job with the GDN30AZ-A3EBA2C model. They’ve thus earned more than 1,000 positive reviews just for this dehumidifier.
The sheer energy-efficiency value is 1.90. That’s even better than the best 70-pint dehumidifiers in 2020. Coupled with a small device, you’re looking at a really small bump to your average electricity bill.
The advantage of a small dehumidifier are also low 52/50/48 dB for maximum, medium, and low noise levels:
The bucket size of the Tosot GDN30AZ-A3EBA2C is only 1.0 gallons. That would in fact be a problem if this was a big 70-pint device. However, the small Tosot dehumidifier, this is a perfect bucket size. You can, of course, also attach a hose and use gravity to remove the water out of the small dehumidifier.
The airflow is also smaller; only 106 CFM. Well, that ‘only’ if this would be a 70-pint dehumidifier. With the 30-pint dehumidifier, 106 cubic meters per hour of dehumidified air is a very good specification.
All in all, if you’re looking for a small dehumidifier to remove a bit of humidity out of your air, the Tosot GDN30AZ-A3EBA2C is the perfect little choice.
#7 VacPlus B0816SXSG8 (WIFI Dehumidifier)
Is there any modern appliance that doesn’t have that one model that’s WIFI-enabled? The VacPlus 50-pint B0816SXSG8 is leading the way in WIFI dehumidifier devices.
What does a WIFI connection even mean for a dehumidifier?
Simply enough, you get an app called Tuyasmart that controls the whole dehumidifier operations. You can literally control the actions of the VacPlus B0816SXSG8 from your couch. Unfortunately, when the water tank is full, you still have to manually empty the bucket. No WIFI or app can do that for you.
Apparently, it’s also one of the quietest dehumidifiers you can get at 35.9 dB. This is a quoted decibel level but it’s so suspiciously low that we won’t take into the account.
The VacPlus does have a WIFI connection but the size of the bucket is, well, only 0.8 gallons. It should be bigger. That mobile app that controls the dehumidifier will probably notify you more often than you would like to empty the bucket.
Being quite an extravagant dehumidifier due to WIFI connectivity, the VacPlus B0816SXSG8 is actually quite an interesting device to try out.
Care To Share Some Dehumidifer Specs Yourself?
Obviously, there are hundreds of dehumidifiers with specifications sheets out there. If you find some really good specs on a dehumidifier that is readily available, you can share them in the comments.
We’re always upgrading this currently 2020 best dehumidifier list in order to really get the idea of what the ultimate dehumidifiers (judged on specs) look like.