Skip intro? See Top 8 Rated Dehumidifiers ⇓
Here we will discuss how to select a best dehumidifier. Individual brands will be shown on another page with links here for top brands. Dehumidifiers are not exotic pieces of equipment—they simply remove moisture from the air for better health and comfort so that you will not feel hot and sticky. They will also eliminate the musty or musky odor when mold spores or other pollutants bond themselves to warm humid air.
- Cost for Dehumidifiers
- Types: Size, Shape, Features, and Capacity
- The Right Size Dehumidifier in Pints
- Other Considerations Shopping for a Best Dehumidifier
- Top-Rated Dehumidifier Reviews
- 1. Frigidaire FAD704DWD Dehumidifier for Basement, 70-pint
- 2. Friedrich D70BP Dehumidifier with Pump, 70 Pint
- 3. Frigidaire FFAD5033R1 Energy Star 50 pint Dehumidifier with Effortless Humidity Control
- 4. Keystone Dehumidifier, KSTAD50B, 50-pint
- 5. EdgeStar Energy Star 30 Pint Dehumidifier
- 6. EcoSeb Desiccant Dehumidifier, DD122EA-SIMPLE, 15-Pint
- 7. Eva-dry E-500 Renewable Wireless Mini Dehumidifer
- 8. Dri-Eaz Crawl Space Dehumidifier, Revolution LGR, F413
- How a Dehumidifier Works
- Different Dehumidifier Varieties
- Benefits Using a Dehumidifier
- Dehumidifier vs Air Purifier, Humidifier and Air Conditioner
- Final Thoughts
Cost for Dehumidifiers
Portable units typically sell from $100 to $400 depending upon the features you want, the water capacity, and output. A whole-house dehumidifier can cost from $1000 to $2000. This again depends upon what type is best for you and your budget. Dehumidifiers are available in mini-units up to larger units to include whole-house dehumidifiers.
Types: Size, Shape, Features, and Capacity
- Portable dehumidifiers can be tabletop models, units with wheels to move easily from room-to-room, and others having handles to move because they are lightweight.
- Whole-house dehumidifiers are larger portable units for dehumidifying larger square feet of space. Whole-house units can also be attached to existing furnaces without a need to empty water. They can also be attached to new furnace systems when installing for the first time.
When you have condensation on your windows in the winter, too much moisture in your home is the problem.
The Right Size Dehumidifier in Pints
The ability for removing moisture is the dehumidifier’s size. The capacity is calculated using USA pints (1-pint is 16-ounces). This is the amount of moisture removed in 24-hours. If you need a ’20-pint dehumidifier’ that means 20 pints of humidity will be removed in a 24-hour day. Pints are also used in calculating the square feet of coverage you will want. A pint is well known and understood. If you have a very damp place, then you will want a larger pint capacity for removing moisture.
Other Considerations Shopping for a Best Dehumidifier
- Square-footage area for dehumidification (multiply length by width of area)
- Water removal method: tank collector or hose or both
- Energy usage of the dehumidifier
- Digital or manual display panel
- Air filter cleaning and replacement
- Energy efficient
- Full bucket alert warning light
- 24-hour timer
- Automatically shuts off
- Noise level in dB
- Automatic defrost and low temperature setting
Low Temperature Setting and Automatic Defrosting
You will want a dehumidifier that at least operates at low temperatures down to 41-degrees F., and at least 2 fan speeds for the intensity you want. When you see frost on the coils, press the defrost button to remove the frost. Check the evaporator for any frosty ice buildup.
Top-Rated Dehumidifier Reviews
Below, we have listed top 7 best dehumidifiers. Among many brands in dehumidifier with a lot of sizes, you may get confused of choosing which one is right for your space. We have done the research from all types of this device and try to be fair to release this list.
1. Frigidaire FAD704DWD Dehumidifier for Basement, 70-pint
In the performance field, this model gets 9.13 out of 10 points. Frigidaire FAD704DWD has high moisture outtake which is 70 pints per day in addition to the high collection reservoir, about 16.3 pints. Due to two above features, this machine can be placed in the large spaces with high humidity such as bathroom, kitchen, etc., but it may cost much energy than usual as it has to work harder, which means the electricity bill every month will be a little bit higher. Besides, this dehumidifier has low noise level so that you can use it comfortably without being annoyed about the loud noise. Another factor, you can use a pipe to lead to the water evaporated outsides without emptying the collecting tray usually.
About the conveniences, this machine provides some useful functions such as: auto shut off, full bucket alert, digital display, removable air filter, and drain pump. For example, with the auto shut off function, you have no worry about the machine still runs while you are out or care about the time to shut it off. With the removable air filter, you can easy remove and clean to make the machine work well and last long. Another advantage if you choose this device is the high warranty with the sealed system warranty up to 4 years.
About the design, this machine is rather heavy and takes large space, also, it is a bit tall, which is 24.8 inches height.Read full reviews
2. Friedrich D70BP Dehumidifier with Pump, 70 Pint
Like the Frigidaire FAD704DWD Energy Star 70-pint Dehumidifier, this kind has the same moisture outtake, which is 70 pints per day with 16.2 pints in collection reservoir. Therefore, Friedrich D70BP can be used in large spaces with high moisture in the air. Another side, the user will be pleased to use this machine as it causes soft noise in addition to many offered functions, such as auto restart and shut off, 24-hour timer, full bucket alert, auto defrost, etc. You needn’t worry about the lack of electricity while you are out as the machine is able to turn on again right after the power is on. Or the auto defrost function, the device can turn off dehumidifying automatically if the evaporator coil reaches a certain low temperature level to avoid freezing the coil.
About the warranty, this kind is higher than the Frigidaire FAD704DWD with 5 years warranty for the sealed system.
However, a small disadvantage is high running cost due to the large dehumidifier area and its capacity. In exchange, it brings up to you comfort and protection for your health. Also, it is rather heavy and takes much space. So, if your house is small, you need to consider choosing this one.
3. Frigidaire FFAD5033R1 Energy Star 50 pint Dehumidifier with Effortless Humidity Control
Even though this kind is a little bit lower in moisture outtake than the previous ones, about 50 pints per day, it costs less energy and offers lower electricity bill every month for the user. Besides, Frigidaire FFAD5033R1 is also famous for its durability and noise output, which is 5 out of 5 stars. Another point, the water collecting tray is easy to be removed and emptied, if the water is over the limit of the tray, the machine will turn off automatically to protect itself so that you do not have to worry. Moreover, this model does not take much space like the previous kinds, thus, it is rather suitable for those families who have small houses.
Because of the simple structure and feature, FFAD5033R1 is rather easy to use and also very easy for portability. The high quality materials make the machine become strong and well built, but in a very affordable price and good warranty.
The only disadvantage of this device is that it does not have the auto defrost function.
4. Keystone Dehumidifier, KSTAD50B, 50-pint
This kind is made by Keystone, a famous brand specialized in producing and providing dehumidifiers. It is able to withdraw up to 50 pints of humidity out of the air every day in an area of 3 thousand square feet. The outstanding features of this are the LED light, the timer, a full water bucket caution, and the function of automatically turn off. It is also very easy to clean the filter with the alert of cleansing. The automatically turn on, in case, there is a power outage as well as the rolling casters, allows you to move it to anywhere more easily.
- Capable of withdrawing up to 50 pints
- Used in 3,000 square feet
- LED display
- Full water bucket alert
- Automatically turn on / off
- Easy to clean the filter
- Have rolling casters
- The inconvenient bucket design
5. EdgeStar Energy Star 30 Pint Dehumidifier
This portable kind has the same moisture outtake with the Frigidaire FFAD5033R1, which is 50 pints per day and can work in large area with about 3000 square feet.
Besides, there is a rule of thumb that is the lower the temperature when the machine works, the more beneficial it will be. Usually, an industry dehumidifier has 65 degrees F but the best device can offer under this standard and may be 45 degrees F. The EdgeStar Energy Star here is a typical example. Besides, this machine offers many extra functions such as auto restart, shut off and defrost, full bucket alert, 24-hour timer, so forth and so on.
Another point, it costs less energy so that you can reduce the electricity bill every month. Also, weight and width is rather low so that you can use it for small space.
However, the warranty of this machine is low with only 90 days labor warranty and 1 year for other parts. It causes the loud noise as well.
6. EcoSeb Desiccant Dehumidifier, DD122EA-SIMPLE, 15-Pint
This Ecoseb Dehumidifier is very suitable for those who are on the tight budgets as its price is rather reasonable. The EcoSeb DD122EA-simple is able to work well on the area bigger than 800 square feet and has the moisture outtake of 15 pints per day. It is listed in Top 5 best portable dehumidifiers and famous for its removal rate, even in low temperature.
Because of the portable function, it is rather light and small. Even though there are many extra functions added to this machine such as Auto Power Saver, Auto Sensor and over dry Protection, and quite easy to operate and run quietly. Due to the desiccant technology, it does not release harmful gas and provides a 1-meter hose to drain the water evaporated outsides.
Another point, the machine offers a good warranty in two years.
7. Eva-dry E-500 Renewable Wireless Mini Dehumidifer
In recommendation, Eva-dry E-500 is used like a Gun Safe Dehumidifier, or cloth, boat, car… This Dehumidifier is known for its durability which can be used up to 10 years in addition to the 100 percent renewability. Also, it is very safe to use even there are kids in the space because it is odorless and has no toxic. Besides, customers are very comfortable and pleasant while it is running as the machine is very silent and compact.
Another highlight point of this product is that you do not need to use batteries. But right from this feature, the machine cannot run fast and you have to wait until it is renewed fully. Due to the mini dehumidifier structure, it is rather light and small with 5.5 inches height, 2.5 inches width and 1.8 lbs. weight, which has the result in less running cost.
8. Dri-Eaz Crawl Space Dehumidifier, Revolution LGR, F413
LGR Dehumidifier is made by Dri-Eaz and highlight for the small, convenient design, as well as prides for the lowest in grain performance with the ability of withdrawing moisture up to 80 pints per day in an area of 7,000 square feet. Besides, it also has Built-in humidistat for controlling the moisture level, very easy to move, various units, quick to clean and maintain. Also, it is suitable for those spaces such as bathroom, stairwells and so on.
- Small design
- Can dehumidify up to 80 pints
- Easy to clean and maintain
- Various units
- Easy to move
- Built – in humidistat
- Cannot used in the basement
- Easy to freeze up
- Timers are convenient for letting you set the amount of time you want the unit to run or if you want it to run 24/7. Some units have a ‘restart’ function for when the power goes out. This means the dehumidifier will come back on automatically.
- Automatic Shutoff is a wonderful advantage for when the tank is full of water and you are asleep. You will have no worries with this safety feature.
- Control Settings are easy to use for selecting the humidity level you want. The best humidity level is between 35% and 50%. Some units have digital controls and some have knobs you turn. Select the one that will satisfy your requirements and your home needs.
- Filters are easy to clean for removing dust and put back into place. Eventually, they will need to be replaced. Each manufacturer recommends how and when to clean and replace pre-filters and other filters. Each brand of dehumidifier uses different sizes and types.
Humidistats and Hygrometers
- Humidistats are built into most of today’s technologically advanced dehumidifiers. They let you set the moisture level and are similar to thermostats that let you set your temperature on your furnace. If your unit does not have a humidistat built in, you can purchase these separately at a reasonable cost on Amazon.
- Hygrometers tell you the percent of moisture in your area. It can be built into a dehumidifier or humidifier and also used in conjunction with a humidistat. Providing a digital or manual readout, it too can be purchased separately on Amazon to put on a shelf or the wall. These are usually battery operated. Humidity is not controlled with a hygrometer. It indicates the room’s relative humidity and indoor temperature.
The small pump built into the dehumidifier is sometimes called a condensate pump. This type of unit is very convenient for basements and other areas in your home. For those without difficulties removing and emptying the tank, this type is ideal.
This is convenient and uses gravity to pull the water down through a hose rather than in a water-holding tank. Simply elevate the unit off the floor so that the hose goes downward. It can go upwards if the unit is above the floor surface. These are useful for those with physical challenges and the elderly. Some unit types have a holding tank for the water, and others use gravity to feed the water downward into a drain or clothes washer drainpipe. Whichever method you prefer, the dehumidifier will do what it is supposed to do.
How a Dehumidifier Works
- A dehumidifier pulls moisture from the air
- The fan inside spins and removes the moisture
- The air passes through cooling coils
- This lowers the temperature
- The air now has no moisture
- It is warmed and put back into the room
- The dehumidifier holds the moisture/water and puts it into the water tank
- Some units have a water hose and some have water tanks
- The hose type lets you drain the water into the sink or floor drain
- The water tank type you remove, empty the water and reinstall
- Automatic shut-off units will shut down when the water level is high
Different Dehumidifier Varieties
To save money and energy, it is recommended you purchase a USA EPA (Environmental Protection Agency) Energy Star® certified model. Light commercial dehumidifiers are available for basements and crawl spaces and for homes.
These units are good for small, medium, large rooms, basements, and garages. They are excellent for open floor plans in your home. These have water removal capacities known as “pints” and include variable fan speeds. Some have knob dials and some have digital controls. Some larger portable units have caster wheels, and smaller tabletop models do not have wheels.
Standalone or Portable Dehumidifiers are not attached to your central heating and cooling system. They are very efficient to dehumidify one floor, one room, or more rooms depending on what size you purchase. You simply plug them in and turn them on.
Whole-house Dehumidifiers do attach to your central HVAC (Heating, Ventilating, and Air Conditioning) system and are hassle- and worry-free. Your house will be more comfortable and drier. For homes approximately 1500-square feet or more, this is a wonderful way to dehumidify your house. A professional HVAC contractor measures your house for the size unit you will need based upon your square footage. Most manufacturers will not guarantee the unit if not done by a professional.
Desiccant Dehumidifiers do not use refrigeration compressors or coils to remove the humidity in the air. These are used for commercial/industrial purposes.
Do not be confused with adsorption and absorption; they are two different functions. Through adsorption, these dehumidifiers use silica gel, charcoal, or other materials where the air goes into the unit passing over a rotating wheel saturated with silica gel for instance. The gel absorbs the moist air before it passes out of the dehumidifier as warmed dry air. These units are best for cooler climates having a lower dew point. Dew point is the temperature where dew forms and is a measure of the moisture in the atmosphere. When the moisture is high, the air is saturated with moisture and can hold no more. Dew point is measured in temperature where humidity is measured in degrees. Cooler climates are usually dry climates, but can still have humidity. These work well at sub-zero temperatures because no water is produced.
Refrigerant Dehumidifiers are very common and not expensive. They are used effectively and efficiently in commercial and residential functions. It performs best in warm and humid climates or homes. You will need to consider the air dry bulb temperature and the dew point. When the air is passed over the evaporator coil, it is cooled. It then passes over the condenser to heat that air. The cold evaporation coil lowers the air temperature to form condensation. The condensation or water droplets drip into a water tank or tray. The water is drained away or collected in the water tank or collection try. With the dew point now lower, the temperature for making condensation is lower. The downside to the refrigerant types is that they can freeze up.
Benefits Using a Dehumidifier
When air is too moist, it can wrack havoc with electronic devices such as computers, laptops, musical instruments, and digital cameras, yet plants thrive! Too much humidity causes unfavorable conditions to grow mold spores, create mildew, dust mites, bacteria, viruses, and other disease causing organisms. Too much humidity is hard on asthmatics, allergy suffers, those with COPD and other lung problems. The musky odor in your closets and in the basement is from too much humidity. Some of the problems you might experience can be:
- Stuffy nose and sinuses, and sneezing
- Breathing problems such as wheezing
- Watery and itching eyes
- Some skin problems
When an air conditioner runs in the summer, it dries the air. However, it has to work harder and longer to dry that air. A dehumidifier will help save the work done by your air conditioner. Having dryer air in your home lessens the need for always dusting furniture and other items. Humidity makes dust stick to ceiling fan blades and that is time consuming to clean.
- Read the instructions in the User’s Manual for installing hoses
- Do not use extension cords that are thin; only use an appliance cord with AWG to match the existing cord
- Keep coils clean of dirt and dust that can cause the dehumidifier to freeze
- Clean the filter once a month and buy a new one when it shows wear
- Keep all invoices and documents should you need to file a warranty claim
- Place your dehumidifier at least 2 feet from walls, doors, and furniture for circulation
Dehumidifier vs Air Purifier, Humidifier and Air Conditioner
Vs. Air Purifier
Dehumidifier is a device taking responsibility of withdrawing the excessive moisture in the air, usually in the summer or the humid regions to balance the level.
This machine is capable of preventing the development from mold and bacteria, helping much for those who have allergies with molds, and so on. By the way, it also helps people get deeper slumbers and the gives dry air to protect the wood, the clothes from odor – causing bacteria, moisture, and avoid damages.
The dehumidifier works on the principle that it will withdraw the air and transfer it through an evaporation, to make the excessive moisture evaporated and turned into water. The water will drop into a bucket or drain hose, and the dry air is blown back to the room.
- Air Purifiers:
Air purifiers are devices with the function of removing some dirt and other micro-sized contaminants in the air like some kind of flu virus, pollen by suction, filtration, and retain dust particles that thanks to the HEPA standard dust filter layer of activated carbon.
They are the machines very suitable for those who are prone to allergies or have a history of asthma. Once air enters the machine, it will be purified and returned to the cleaner air flow, and can remove some odors such as cigarette smoke or smell musty…
Air purifier works on the principle that there is a high voltage to generate the arc and emit negatively charged into the air, neutralize the (bad) positive ions, and create the effect of attracting dust into the machine. General or micro dust suspended in the air can include dust, mold, smoke, and many different kinds of micro-organisms … the toxic elements in the air will be stuck by the negative ions and positively charged metal plates in the machine attract and keep these elements again.
In offices, work areas – where many computers, fax machines, television … are the devices emitting more harmful positive ions in the body. Air Purifiers provide negative ions will increase the amount of oxygen in the air, reducing the unpleasant odors, bacteria, and filters capture dust.
Vs. Air Conditioner
Dehumidifiers and air conditioners are not the same so that the dehumidifying effects are also different. Cannot use the air conditioner to replace the dehumidifier and vice versa.
How do air conditioner and air dehumidifier work?
Dehumidifier is a household appliance that has the feature of removing moisture in the air, but other than chiller is blowing cold air out; dehumidifiers again suck back into the machine through the indoor unit, in which the flow of air with humidity floating through the indoor unit, it will condense into water, while the remaining part will be air escaping outwards. It condenses and is converted into the water tank, which is then transferred through water pipes to the sewage.
Air conditioners also take the desiccant function like a dehumidifier, but it is different in the way to work. Air through cooling coils => cooler, then pumped by the compressor through a pipe to be in cooling space (where the condenser is placed). Waste heat will go through the coil and capacitor, and then is transferred to the outside air. Water condenses on the evaporator in the air conditioning is usually passed through a small tube (drainage) into the environment.
The dehumidifying efficiency
Because air conditioning is featured as desiccant dehumidifiers, so they are sometimes used as temporary dehumidifiers, by sending the waste heat back into the room instead of outside space. As a result, moisture will be eliminated by re-evaporation into the exhaust flow, the air will warm up. Designed with moisture-wicking of air conditioning, the energy saving effect is not as dehumidifiers (machines designed specifically for this purpose).
Besides, most of air conditioning is controlled by a thermal control system rather than humidistat (commonly used to control a dehumidifier). Yet, the temperature and humidity in an enclosed space will be closely related to each other, it is difficult to control by sensing humidity in temperature as the air conditioner.
Effectiveness of the dehumidifiers is higher than air conditioning.
You can use air conditioning as a “temporary” dehumidifier.
Humidifiers are used in environments that use air conditioning, the air will become dry, hot, stuffy, annoyed by the imbalance between temperature and humidity. So, most of us will easily meet complex diseases as respiratory nasal mucosa, dry, such as rhinitis, sinusitis, sore throat, bronchitis, as well as dehydration of the skin makes parched skin become wrinkles, which are so disfigured.
Principle of operation of a humidifier is used ultrasound to turn water into vapor molecules in the form of mist Nano mixing into the air, thus, increasing the amount of moisture to the air. On the other hand, the moisture will enhance deposition of tiny dust in the air. When the humidity reaches 60 ~ 80% of the air, it will become fresh and more comfortable, and bring many benefits to the skin, as well as our respiratory system, especially in hot weather, dry. With humidifier, respiratory problems and skin imbalances encountered the lack of moisture is removed.
Dehumidifier has constructed like air conditioner that works to reduce the humidity in the room down to a minimum. Dehumidifier sucks air into the machine through the evaporator. Airflow with steam running through the filters, and the evaporator will condense into water, while the remaining part will air the rear exit.
Dehumidifiers work on the principle of absorption is particularly suitable for environments with high humidity at low temperatures. This machine has small capacity, usually about 10-50 liters / day, with a very high accuracy, so that it is used more in laboratories or applications, which need precision.
What is the cost to run a dehumidifier?
A 65-pint dehumidifier will draw roughly 600 Watts. 6 kW x 3 hours = 1.8 kWh. 1.8 kWh x 20c/kWh = 36 cents for a 3-hour cycle. If it is on 50% of the time during a 24-hour period that is about $1.50 a day. That 20-cent figure may not include tax and other utility charges so the actual cost may end up being higher. Volts x Amps = Watts. Contact your power company for rates.
What is the recommended relative humidity inside my house?
Ideally, the best range is 30% to 50% for your health and comfort. When it is below 30%, things begin to dry out and nasal and sinuses passages become dry that can cause colds. When the relative humidity is over 50%, mold spores and dust mites reproduce, and windows are covered with condensation.
Where can I put my dehumidifier?
The most humid areas of a home are kitchens, bathrooms, and basements. The reason is these rooms use the most water. The kitchen uses water for cooking and the steam from cooking produces moisture and window condensation. Bathrooms use lots of water and the same thing happens, and the laundry done in the basement creates moisture. Crawl spaces are usually wet environments being below the ground level.
Dehumidifiers are also useful in a garage, workshop, RV, and large boats with cabins. Mini-dehumidifiers are great for kitchen cupboards to prevent dry goods from becoming soggy. The minis are also useful under kitchen and bathroom sinks for controlling moisture. Humidity causes corrosion and rust to tools and furniture.
With an indoor hot tub or pool, the water can breed mold and bacteria so you might want to consider a dehumidifier in that area.
Do dehumidifiers make noise?
Dehumidifiers are thermoelectric units that send an electric current through two different metals that transfer heat having the same effect used by compression technology. There are no moving parts and the only noise is slight from a fan circulating the air. These are less energy efficient than compressor types, better for small areas and very quiet. Some units are whisper-quiet while others can be noisier depending on the fan speed. Check the dB (decibel) levels for the unit you are considering buying.
What is the life span of a dehumidifier?
How long your dehumidifier will last is dependent on several things: your climate and weather where you live. In extremely cold temperatures they work less effectively especially in homes not well sealed or insulated. The typical lifespan is 8 years and sometimes 3 to 5 years with consistent use. The correct pint size for the square footage of your area will keep your unit working longer. It will need to be cleaned and maintained, dusted, and filters cleaned and changed when they are showing signs of wear.
How do I size a dehumidifier?
A portable dehumidifier must be suitable for the space you want it. Small units remove 25 to 30 pints of water from the air in 24-hours. Medium-sized units remove up to 45 pints and accomplish results in areas such as kitchens and medium room areas. Large units remove 50 to 75 pints, making them good for areas with wet conditions, such as basements and garages. Read manufacturers’ specifications when deciding on your area of coverage.
How do I compute my area of coverage?
- Under 1500-square feet and up: 30 pint
- 2000-square feet and up: 40 to 50 pint
- 2500-square feet and up: 60 to 70 pint
This will also depend on how damp the area is, if it smells musky and has mold, condensation on the windows, during rainy days and days of high humidity levels outdoors.
How can I extend the life of my dehumidifier?
After you turn your unit off, wait for 10 minutes before turning in on again. This allows the pressure in a refrigeration system to even out. Always place the unit away from objects for good airflow. Make sure the relative humidity is set for your inside conditions and temperature. Always do maintenance as the manufacturer states in the manual. Using vent fans at the kitchen stove and in the bathroom takes some of the burden off your dehumidifier by removing moisture from the area.
We hope the information provided here will be helpful when you are shopping for a dehumidifier. You have nothing to lose and everything to gain when you use a dehumidifier to control moisture and gain health benefits. Think about your budget, the manufacturer’s warranty, features, and capacity when you are shopping. Read customer reviews because they can be helpful.