Choosing a model that is the right capacity (size) is paramount when buying a dehumidifier. They come in a wide variety of sizes, which can make selecting the right one for your living space confusing. So let’s discuss the basics of dehumidifier size so you can choose the best dehumidifier for your home.
Table of Contents
Do I Need a dehumidifier?
When contemplating buying one for the first time most people will first ask themselves; do I really need a dehumidifier? For most of us, the answer is usually yes.
High humidity can damage furniture, clothing, electronics, and wallpaper. It can make many areas of your home unbearable and/or unhealthy. In rooms, such as laundry rooms and basements where higher levels of dampness are common due to natural conditions, a dehumidifier can help solve your problems. Plus, it will reduce those musty odors. You can learn about all the benefits of dehumidifiers here.
Even if you own a home air conditioner, there might be enough moisture in the air of your home to still make having a dehumidifier be a necessity during the summer months. This happens when the air conditioner gets the home to the desired temperature and shuts off (like it is supposed to do) despite the humidity levels still being higher than you would like. However, the need for a dehumidifier doesn’t necessarily end once fall comes. Many homes have problems with excess moisture year-round.
Thankfully, a dehumidifier can help us to maintain the recommended relative humidity level in our homes regardless of which season we are in. The EPA states that relative humidity (RH) should be kept below 60 percent — with levels between 30 percent and 50 percent being ideal.
Main Types of Dehumidifiers
There are two main types of dehumidifiers namely: refrigeration and desiccant dehumidifiers. Each type has different strengths and weaknesses. So understanding the differences can help you purchase the correct model for your situation.
Desiccant Dehumidifiers
Desiccant dehumidifiers work well in spaces that require consistent dehumidification, including laundry rooms, basements, or garages. One advantage of desiccant dehumidifiers is that they can work at low air temperatures (below 65°F ), which can cause refrigeration style dehumidifiers to freeze up and stop working.
They work by passing the air through the rotor that contains materials (such as silica gel) that absorb and hold water vapor. These materials usually absorb water from the air, after which the air is then pushed back out through vents into the room. Eventually, the desiccant material is heated, which vaporizes the water then it is then ducted out of the room.
In addition to working well in cooler temperatures, there are a couple of other positives about desiccant dehumidifiers. First, unlike the refrigerant types, desiccant dehumidifiers don’t have a compressor or use any refrigerants, which makes them easy to maintain. Second, because they don’t have a compressor desiccant dehumidifiers have lower noise levels and usually run quieter than their refrigeration style counterparts.
Refrigeration Dehumidifiers
Refrigeration humidifiers are by far the best at eliminating and removing excess moisture from the air compared to desiccant dehumidifiers, especially at high moisture and higher temperatures. This unit comes with refrigerated coils that help to drive the moisture out simply by pulling the damp, warm air from within the room and passing it over these cold evaporator coils that cool the surrounding air below its dew point temperature. In turn, the gaseous water in the air undergoes condensation. Then, the condensed water is automatically captured by the machine and directed into the storage unit. After some time, the water is ejected from a dehumidifier machine through the floor drain, and the dried air is released into your room or the facility’s environment.
Refrigeration style dehumidifiers are more energy-efficient and consume less energy per hour and are thus generally cheaper to run and own.
The vast majority of people are buying dehumidifiers for use in their homes and don’t need to worry about having to operate the dehumidifier in colder temperatures because of this and the fact that they are more energy-efficient, the most common type of dehumidifiers people buy are the refrigeration style.
How to Calculate Your Needs?
Different room sizes and conditions require different dehumidifier ratings. Various factors will determine the best dehumidifier capacity for your room or house. Therefore, when selecting your model, these are the two main factors to consider:
The Size of Your Room or House You Wish to Dehumidify (Square Footage)
First, think about the size of the house you want to dehumidify. Remember to measure your room in square meters. Noticeably, that is the unit given or quoted by the manufacturer. Also, you need to decide on the space your tool will cover. To this end, you must calculate the square footage.
Consider Dampness In The Area You Wish to Dehumidify
Choosing a model based on the size of your room as well as its capacity alone isn’t enough, though. To come out with the best solution, you need to consider the conditions of your room. So you need to ask yourself this question- How damp is my space? Stick with the capacity that matches your space. If your space has lower levels of humidity, choose a smaller-capacity unit. If you want to tackle an extremely wet space, then go with a larger capacity unit.
So let’s talk about different levels of humidity and how you might be able to identify them without the use of a humidistat. For the purposes of our discussion let’s break it down into four categories
- Moderately Damp (RH level between 50 and 60 percent) – There is an occasional musty smell and feels damp.
- Extremely Damp (RH level between 60 and 70 percent) – It often smells musty and will often feel damp.
- Wet (RH levels of between 70 and 85 percent) – Area feels wet and smells musty with damp spots on walls and/or floors.
- Extremely Wet (RH level that’s greater than 85%) – Area feels wet and smells musty with water seepage appearing on the walls and/or floors. You may also notice mold growing.
So What Size Dehumidifier Do I Need?
So once you have decided what type of dehumidifier you want to have you need to think about the size or capacity, that will be best for the area you will be putting it into. Units are usually categorized by the number of pints of water they can collect in a 24 hour period. They come in four main categories.
Which category you should be considering is largely determined by the size of the space you are trying to dehumidify and the level of moisture in the air. Let’s take a look at the different categories.
Small Dehumidifiers
Maybe you only have slight excess moisture problems in just one small area of your house. If that is the case, you might want to look at getting a small (or mini) dehumidifier. There are units that are designed to be in areas that are 200 square feet or less and spaces that are between 200 and 300 square feet.
Because of their small size, these models are great for small spaces such as bedrooms, bathrooms or enclosed kitchens. However, some of these units might only hold around a full pint of water and only remove 1/2 pint per day. Due to the limited amount of moisture they can remove from the air each day you want to remember that they aren’t the solution for larger areas or spaces with very high humidity levels.
30 Pint Dehumidifiers
These models are suitable for areas between 500 and 3,000 square feet depending on the dampness. Each day, they collect about 30 pints of water and are appropriate to use in residential spaces including basements. Here is some more information on when to use 30 pint units:
- 500-1500 square feet – Good for extremely wet spaces with RH up to levels that are greater than 85%
- 2000 square feet – Good for extremely damp spaces with RH up to levels between 60 and 70 percent
- 2500-3000 square feet – Good for moderately damp spaces with RH up to levels between 50 and 60 percent
- Powerful 30-Pint Moisture Removal for Spaces up to 2500 Sq. Ft: High humidity can make rooms feel damp, uncomfortable, and difficult to maintain. This dehumidifier removes up to 30 pints of moisture per day (under 95°F, 90% RH) and helps regulate humidity in spaces up to 2500 sq. ft. Ideal for basements, bedrooms, bathrooms, kitchens, laundry rooms, garages, offices, storage spaces, apartments, and RVs, delivering dependable comfort during humid months
- Three Smart Modes for Everyday Humidity Challenges: Different environments require different solutions. DEHU Mode lets you set humidity from 30%–80% for daily comfort, DRY Mode helps dry clothes more quickly on damp days, and CONT Mode is perfect for long-term operation in areas with recurring humidity. (Tip: Close windows and doors during use for best results.)
- Continuous Drain Ready + Auto Shut-Off for Busy Homes: Avoid constant tank emptying. Use the 0.52-gallon water tank with auto shut-off and full-tank alert, or switch to the included 3.28 ft drain hose for continuous drainage—ideal for basements, laundry rooms, and spaces that require long-running moisture control
- Mirage Display & Customizable Humidity Settings: The backlit mirage display allows clear visibility day or night and auto-adjusts brightness in dark environments. Set your preferred humidity between 30%–80% to create the “just-right” atmosphere for sleeping, relaxing, or working
- Quiet 34dB Operation for Daytime or Night Use: With noise levels as low as 34dB, this dehumidifier is suitable for bedrooms, nurseries, upstairs rooms, and shared spaces where quiet operation matters—ensuring comfort without disrupting rest
- 【Powerful Dehumidification for 2000 Sq.Ft】 Removes up to 30 pints of moisture per day (86°F, 80% RH). Provides exceptional moisture control for bedrooms, living rooms, and small basements up to 2,000 sq.ft., restoring your room's ideal comfort level quickly.
- 【Smart WiFi & Voice Control】Fully Wi-Fi enabled for remote monitoring. Use your smartphone to adjust humidity targets, set schedules, or turn the unit on/off from anywhere via the app. Includes a built-in 24-hour timer for ultimate hands-free convenience.
- 【3 Versatile Modes: Laundry/Auto/Custom】 Switch to DRY Mode to quickly remove moisture from wet clothes indoors. Use AUTO Mode for smart whole-home control, or HUM Set to customize your exact humidity target between 30-80%.
- 【Ultra-Quiet for Sleep & Work】 Designed specifically for living spaces, it runs quietly to ensure it won't disturb your sleep or daily tasks. Features a Child Lock function to prevent accidental setting changes, providing peace of mind for your family.
- 【Two Easy Drainage Options】 Empty the 1.6L removable water tank manually (the unit auto-stops when full), or connect the included 4.9 ft drain hose for continuous, automatic gravity drainage. No more daily hassle of pouring water.
- [Large, Quiet Capacity] Removes up to 30 pints/day in spaces up to 2,000 sq ft, operating under 38dB. Ideal for bedrooms and basements without disturbance.
- [Smart Humidity Indicator] The color-coded display ring shows ambient moisture instantly: blue (dry, <45%), green (comfortable, 45-65%), red (humid, >65%), for easy environmental control.
- [4 Versatile Modes] Includes Auto, Drying, Sleep (quiet night use), and Fan-Only modes for adaptable climate control in any scenario.
- [Convenient Water & Air Management] Features a 0.53-gal tank, washable air filter, and 3.28-ft drain hose for continuous drainage, reducing maintenance effort.
- [Smart & Portable Design] Easy to move on 360° casters. Includes auto-defrost and a 24-hour timer for automated, efficient humidity control anywhere at home.
50 Pint Dehumidifiers
50 pint dehumidifiers can handle middle-sized spaces that are extremely humid or large spaces that are a little less humid. These units are powerful enough to work well in areas that smell musty and damp all the time. Here is a little more guidance on when to buy a 50 pint dehumidifier:
- 500-1000 square feet – A 50 pint humidifier is probably too big and unnecessary for this size of space.
- 1500 square feet – Good for extremely wet spaces with RH up to levels that are greater than 85% (A 50 pint dehumidifier might be a little too much for a space this size if it has lower humidity levels )
- 2000-2500 square feet – Good for extremely wet spaces with RH levels that are up to and greater than 85%
- 3000 square feet – Good for wet spaces with RH up to levels up to the 70 and 85 percent range
- EASY TO CLEAN WASHABLE FILTER: Capture dust from the air and keep your dehumidifier working efficiently with our easy-to-clean washable filter.
- CUSTOM HUMIDITY CONTROL: Maximize your comfort with customized control over the amount of humidity in your room.
- EASY TO CLEAN WASHABLE FILTER: Capture dust from the air and keep your dehumidifier working efficiently with our easy-to-clean washable filter.
- 【𝑾𝒉𝒐𝒍𝒆-𝑯𝒐𝒎𝒆 𝑴𝒐𝒊𝒔𝒕𝒖𝒓𝒆 𝑴𝒂𝒔𝒕𝒆𝒓】 Tackle dampness anywhere with our 50-pint dehumidifier! Its heavy-duty compressor works quickly to reduce humidity from 90% to a comfortable 30%—perfect for bedrooms, basements, laundry areas, and large spaces up to 5,000 square feet. Finally, breathe easy in a fresher, drier home.
- 【3-𝒊𝒏-1 𝑺𝒎𝒂𝒓𝒕 𝑫𝒓𝒚𝒏𝒆𝒔𝒔 & 𝑪𝒂𝒓𝒆】 This versatile dehumidifier combines three functions in one: control humidity (30%-80% adjustable), quickly dry laundry, or circulate fresh air. The display shows real-time humidity (20%-90% range), while dual fan speeds let you customize power for any need—from gentle drying to rapid moisture removal.
- 【𝑺𝒆𝒕 𝑰𝒕 𝒂𝒏𝒅 𝑭𝒐𝒓𝒈𝒆𝒕 𝑰𝒕 𝑫𝒓𝒂𝒊𝒏𝒂𝒈𝒆】 Choose your preferred drainage: use the 1.6-gallon removable tank (auto-shutoff when full with indicator light) or connect the 60-inch drain hose for continuous, hands-free operation. No more interruptions—perfect for basements or long vacations!
- 【𝒀𝒐𝒖𝒓 𝑪𝒐𝒎𝒇𝒐𝒓𝒕, 𝑨𝒏𝒚𝒕𝒊𝒎𝒆 𝒂𝒏𝒅 𝑨𝒏𝒚𝒘𝒉𝒆𝒓𝒆】 Move it anywhere with 360° smooth-rolling wheels and a comfortable handle. The control panel features a 24-hour timer and child lock, while the washable filter and advanced frost sensor ensure reliable operation even in chilly 42°F environments. Winter won't stop your comfort!
- 【𝑺𝒎𝒂𝒓𝒕 𝑺𝒂𝒇𝒆𝒈𝒖𝒂𝒓𝒅𝒔, 𝑺𝒊𝒎𝒑𝒍𝒆 𝑺𝒐𝒍𝒖𝒕𝒊𝒐𝒏𝒔】 Advanced electronic sensors auto-detect humidity and water levels, pausing operation when the tank is full. Clear error codes (E1/CL/CH/LO/HI) quickly identify issues, while multiple safety protections ensure worry-free drying. For details, just check the manual!
- 【The Undisputed Champion — Industry‑Leading Dehumidifier Brand】When you choose AEOCKY, you get double market validation. In 2025, AEOCKY was an industry‑leading dehumidifier brand on Amazon US. Millions trust BOREAS-001 for lab-validated engineering, not hype. This isn’t just an appliance—it’s a definitive humidity solution. Skip inferior knockoffs and trust the undisputed champion.
- 【Verified Whole-Home Mastery: Engineered for Demanding Spaces】Unlike inflated claims, BOREAS-001 provides verified, heavy-duty humidity control for varied residential needs. It rapidly extracts 50 pints/day in hot garages(95℉, 95% RH) and 38 pints/day in damp basements(86℉, 80% RH). Whether clearing condensation on bathroom walls, keeping living rooms comfortable, or tackling heavy dampness in storage areas, its consistent power leaves your entire home perfectly dry. (Capacity differs from tank volume)
- 【Efficiency - Save More Energy】Standard machines blindly run up electric bills.With higher energy efficiency than many less optimized models, BOREAS-001 can significantly reduce power consumption during continuous use. Based on 24/7 use, its efficiency advantage can translate to up to 50% less energy usage, helping save up to 276 in annual electricity bills.We believe performance should come with efficiency—helping you manage energy costs while maintaining a perfectly balanced indoor climate.
- 【Industrial-Grade Durability: Engineered for Harsh Environments】Why do standard units die after one season? Cheap aluminum coils. As a 2025 industry pioneer brand, BOREAS-001 features 7mm high-tooth inner-threaded pure copper tubing and blue hydrophilic fins to maximize heat exchange. This is our declaration of war against planned obsolescence. Built to aggressively outlast the competition in tough basements and demanding residential areas, it delivers a 3+ year lifespan. Consumers seeking long-term value choose AEOCKY.
- 【Library-Grade Silence: Undisturbed Peace for Bedrooms and Offices】Built with premium materials and advanced acoustic engineering, BOREAS-001 sets a new benchmark for quiet operation. While others tolerate 50dB+ “tractor-like” noise, BOREAS-001 uses a proprietary dual-chamber acoustic structure to isolate vibration and smooth airflow. Even at its highest dehumidification setting, BOREAS-001 runs quieter than the sleep mode of typical compressor units, delivering library-grade ~40dB performance—powerful, efficient, and virtually unnoticed.
70 Pint Dehumidifiers
If you need a dehumidifier for a large space and/or dealing with extreme humidity plaguing your home during hot and humid months, then a 70 pint dehumidifier could be your answer. These models can easily remove about 70 pints of water a day. They are superb for homes with very wet crawl spaces and basements. Here is some advice on the situations where you will want to consider a 70 pint dehumidifier:
- 500-2000 square feet – A 70 pint humidifier is probably too big and unnecessary for this size of space.
- 2500-3000 square feet – Good for extremely wet spaces with RH levels that are up to and greater than 85%
- AIRPLUS Multifunctional Dehumidifier For Hone:Combines dehumidification,drying,and air purification functions in one machine.With the dual protection of water full auto shut off working and compressor power off,ensures optimal performance and longevity,The dehumidifier is safe to use even when you are not at home.
- High Effective Dehumidification:Our basements dehumidifier has an efficient and energy-saving compressor,You can easily remove 70 pints of water per day and covers areas up to 4,500 Sq Ft.It's perfect for use in basements,homes,garages,bathrooms,bedrooms,offices,kitchens,laundry rooms,storage rooms
- 4 Smart Modes Dehumidifiers:The 4 smart modes of our dehumidification options make it easy to switch between From dry mode for delicate clothes to advanced noise reduction design and sleep mode,Say goodbye to excess moisture, mold, and allergens！
- Two of Drainage Options:You can choose between using the 3.9 ft long dehumidifier hose for easy and continuous drainage,Or the 0.7 GAL large capacity tank,which automatically shuts off when it's full to prevent overflowing.The detachable filter allows you to remove and wash it.
- Intelligent Control:Our AIRPLUS dehumidifier is equipped with button control panel Digital display of temperature,humidity,timer,and current mode indicator for at-a-glance use.24-hour timer,Auto shut-off/restart,Automatic defrost function,Negative ion function.Comes with a detailed instruction manual.
- 【The Undisputed Champion — Industry‑Leading Dehumidifier Brand】When you choose AEOCKY, you get double market validation. In 2025, AEOCKY was an industry‑leading dehumidifier brand on Amazon US. This means you’re not just choosing a flagship from a market leader, but the top choice proven by millions of real users—representing the ultimate combination of performance, quality, and trust.
- 【OFFICIAL VERSION 6.0 vs. FAKE "2025" HYPE】 Stop paying for "marketing fluff." Terms like "Energy Star 2025" are FABRICATED to mislead you into thinking an "Energy Star" unit is "Energy Star Most Efficient" unit. These unverified claims often hide poor quality. AEOCKY Leo-Lite adheres strictly to the Latest Energy Star Version 6.0. No tricks, just facts. Choose the Leading Brand for 100% verified performance and the safety guarantee that "fake label" products cannot offer.
- 【True ENERGY STAR Version 6.0 Compressor Dehumidifier for homes (4500 sq.ft)】74 pint/day in the humid Mid-summer (95℉, 95%RH); 52 pint/day in the warm, damp basement (86℉, 80%RH)!Not every unit can achieve the prestigious " ENERGY STAR Version 6.0". LEO-Lite is ultimate choice for energy savings and environmental protection. (Dehumidification capacity≠Water Tank Volume)
- 【Top-Rated Efficiency - Save More Energy】Breaking industry barriers, one of the first brands to achieve ENERGY STAR Version 6.0. Compared to non-Energy Star inefficient products,LEO-Lite efficiency is increased by ≤50%, saving ≤1000 on electricity bills annually (running 24/7 year-round). Relentless pursuit of technological innovation in efficiency is the ironclad moat that has established AEOCKY as the leading dehumidifier brand.
- 【Same Core Components as the Flagship- Best Value Entry Flagship】Engineered for excellence, LEO-Lite is built on our flagship platform. AEOCKY utilizes Cutting-Edge High-Efficiency Rotor Compressor Pro+ to LEO-Lite, whose core components evaporator and condenser adopt“3+2”structure. We insist on 7mm diameter high-tooth internal thread pure copper tubes—never aluminum. We also equipped with advanced blue hydrophilic aluminum foil, achieving breakthrough heat exchange efficiency meeting the most rigorous energy efficiency standard in history.
- 【From Damp to Comfortable - 80 Pints/day Powerful Dehumidifier for Basement, Home & Large Rooms】: This dehumidifier for basement and home removes up to 80 pints per day (Regular: 18-45 pints per day) and works as a large room dehumidifier or whole house dehumidifier. Designed for 4500 Sq.Ft damp basements, garages, and everyday living spaces, it helps control moisture, reduce damp air, and improve overall indoor comfort.
- 【40 dB Sleep Without Disruption - Quiet Dehumidifiers for Home, Bedroom】: This quiet dehumidifiers for home and living room is designed for daily home use, making it suitable as a bedroom dehumidifier, living room dehumidifier, and reliable basement dehumidifier. It delivers effective moisture control while maintaining a quieter home environment during day and night use.
- 【Energy Efficient Design - Dehumidifier for Continuous Use, All-Day Comfort】: Built for extended operation, this energy efficient dehumidifiers for home supports long-term use without unnecessary power consumption. Ideal as a whole house dehumidifier, it helps maintain balanced humidity levels across large rooms and multiple areas.
- 【Automatic Humidity Control - Smart Dehumidifier for Hands-Free Comfort】: This smart dehumidifier automatically adjusts performance based on humidity levels. Designed for large rooms, basements, and whole-house spaces, it provides hands-free moisture management without constant manual adjustments.
- 【No More Emptying Buckets - Dehumidifier with Drain Hose for Basement & Home】: This dehumidifier with drain hose supports continuous drainage for hands-free use, making it ideal for buyers looking specifically for a dehumidifier with drain hose. A removable water tank with auto shutoff offers added flexibility, making it a practical basement dehumidifier with drain hose for basements, bathrooms, bedrooms, garages, and storage areas.
Other Things to Consider
As we just stated, the square footage of the space and the overall level of dampness are the two biggest things to consider when deciding the capacity of the dehumidifier you need. However, there are some other factors that might make you increase your calculations and decide to get a higher capacity model.
Number of People In the Home
As humans, we are constantly expelling water into our environment. Whether we are talking, breathing or sweating our bodies are releasing moisture that is being absorbed by the air around us. So it only makes sense that the larger the number of people who live in a home the need for a higher capacity dehumidifier increases. Some places suggest that you will need an additional 5 pints of capacity for every 4 people in your house.
There are some additional factors associated with the number of people[le in your home that might require you to think about a higher capacity dehumidifier.
Washer and Dryer
If your home has a laundry room, then it requires additional water-removing capacity. This is because water is constantly flowing and evaporating whenever you run your dryer or washer. If you have a larger family or just simply do a lot of laundry you might want to add more 5 pints to your overall calculation.
Windows and Doors
One way moisture can sneak into your house via open doors and windows.
If you live in a humid area and have a lot of people constantly coming and going or if you simply like to leave the windows and patio doors open to get fresh air in the house you might want to add another 5 pints of capacity to meet your home’s needs.
Bathroom
Your bathroom is a room that bacteria and mold loves. Simply flushing your toilet, running showers and washing your hands can increase the relative humidity of your bathroom.
If you like to take long showers or if there are a lot of people living in your home who are taking multiple showers per day you might want to add another 5 or 10 pints to your calculations. This is especially true if your bathroom isn’t very well ventilated.
Why Not Just Get The Largest Capacity Unit You Can Find?
Getting a 70 pint model might not be a bad idea, but it might not be the right thing for you to do either.
Cons
There are several reasons why you might not want to get a model that is bigger than you need. One reason is that you could spend a lot of extra money. Another reason is that a larger unit will usually make more noise than a smaller unit and depending on where you put it noise could be an issue for you. Finally, the bigger the capacity the larger the dehumidifier will be larger and weigh more (70 pint units can be about 50 pounds), which can be an issue if you plan on putting the dehumidifier in a small space or plan on moving it around to different areas of the house.
Pros
Getting a large capacity model can be a good choice for several reasons. First, you know that it will be able to meet your needs and get the humidity to a healthy level in your home. Second, because it will be able to get the moisture out of the air faster than smaller models it might be more energy-efficient than a slightly smaller unit that needs to run virtually non stop to get the job done. Lastly, a larger capacity unit might last longer than some of its smaller capacity counterparts since it won’t have to run as long to do the same job.
Summary
Selecting a model with the proper size (capacity) is arguably the most important part of buying a dehumidifier. If you take a few minutes to think about the size of your home and the level of moisture in the air you will be able to successfully find a dehumidifier that will be able to meet your needs for years to come. That being said, if you are having a hard time deciding, remember to error on the side of going with the larger capacity option if you are having a hard time.
Last update on 2026-04-22 at 14:56 / Affiliate links / Images from Amazon Product Advertising API