Best Dehumidifier For A Basement

Basements can be cold, damp places at the best of times, but during the winter months, they can feel even damper. Telltale signs like black patches on the walls, condensation on any windows, that musty mildewy smell that’s usually associated with old churches, or even mould and mildew patches on the walls. These are all indicators of a problem with damp.

Sometimes there’s nothing to repair, it’s just the overall dampness of the basement caused by the low level of the building. So you just have to put up with it, right? Well, you could, or you could invest in a dehumidifier to extract all that moisture. It can be confusing, there are so many makes, models and types of dehumidifier out there that choosing one can seem insurmountable.

SaleBestseller No. 1
ELECCI 12L/Day Dehumidifier for Home with Digital Humidity Display, Sleep Mode, Laundry Drying, Eco-friendly, 24 Hour Timer, 1.4L Tank Capacity, Universal Wheels, Dehumidifier for Drying Clothes
  • EFFICIENT DEHUMIDIFICATION: ELECCI dehumidifier efficiently removes moisture up to 30 pints in a room covering up to 1500 sq. ft (under RH90% @ 86℉ condition). With the humidity setting ranging from RH40% to RH80% and CO (Continuous Operation), it serves not only as a small dehumidifier for basements, but also a dehumidifier for bedrooms, living rooms, offices, kitchens, bathrooms, laundries, sheds and tiny houses. Just get room humidity under your control!
  • 4 OPTIONAL MODES: ELECCI dehumidifier for home features four humidity modes, effectively meeting your diverse needs for dehumidification. Simply short press the MODE button and then the HUMIDITY button to customize your ideal humidity from RH40% to RH80% and CO (Continuous Operation) under STANDARD mode, or switch to another mode (DRYING mode with automatic CO status, RAINING and SLEEP mode respectively with default target humidity of RH45% and RH50%). Press and select as you please.
SaleBestseller No. 2
ANSIO Dehumidifier 500ml Pack of 10 Condensation Remover Moisture Absorber Dehumidifiers for Damp, Mould, Moisture in Home, Kitchen, Wardrobe, Bedroom, Caravan, Office, Garage, Bathroom, Basement
  • DAMPNESS / HUMIDITY REMOVER: Ansio Interior Dehumidifiers are designed to remove dampness & humidity from the air. For domestic purposes only.
  • EFFECTIVE IN REMOVING DAMPNESS: These disposable Dehumidifier tubs contain unique hydrophilic crystals that are specifically formulated to draw and retain moisture from the air. This helps combat condensation, damp rooms, allergens in the air, mould, mildew and neutralises odours. The dehumidifier tubs act as good condensation absorbers for windows.
Bestseller No. 3
20L/Day Home Dehumidifier, Removes Condensation, Humidity, Damp, Moisture & Purifies Air Quality. Clothes Drying, Continues Drainage, Auto-Off, 24 Hours Timer for Homes, Offices, Basements, Laundry
  • EXTRACT UP TO 20L OF MOISTURE DAILY: With a powerful dehumidification capacity of 20L per day, this portable unit ensures improved air quality and a healthy environment in areas spanning 20-30M (250sqft – 360 sqft). It effectively removes excess moisture, making spaces comfortable and free from dampness.
  • AUTOMATIC SAFETY FEATURES: When its 6.5L tank is full, the dehumidifier automatically shuts off for safety. This feature ensures hassle-free operation without the risk of overflow. Moreover, the machine boasts an automatic defrosting function, enhancing its efficiency and lifespan.
Bestseller No. 4
BAPHIYA Dehumidifier for Home Damp with 2.5L Tank, Low Energy Auto Dehumidify Quiet Small Dehumidifier with Digital T& H Display/Anion/Photocatalyst/Auto Defrost, Perfect for Wardrobe
  • 【2.5L Removeable Tank】The dehumidifier is desigened with a 2.5L large tank, to avoid pour of water frequently ; There is a hole reserved on the tank for pouring the water without opening the lid.
  • 【Easy to use by one button】 Turn on or off the auto dehumidification by short pressing the power button; Turn on the negative ion generator and photocatalyst purification by long pressing the power button. The machine will defrost automaticly in low temperature, and automatic stop when the water is full;
SaleBestseller No. 5
Daewoo Capacity Room Dehumidifier with LED Power Indicator, 12 Litre
  • HIGH MOISTURE REMOVAL – Effectively extracts 12-litres of excess moisture per day, the 2-litre water tank ensures extended operation without frequent emptying or connect the hose for continuous drainage, ideal for long-term operation and unattended use
  • IMPROVED AIR QUALITY – Reduce mold, musty odors and promote cleaner, fresher air in rooms ranging from 15-25M² such as living rooms, bedrooms, a home office and more. Adjust the humidity and set to your desired level for precise moisture regulation

What Do You Need To Know Before Buying A Dehumidifier?

Read on to find out what you need to take into account before making your final decision.

How Cold Is The Basement Likely To Get?

This should be your first consideration, once you know how cold the area is likely to get, you can decide which dehumidifier is best for your basement. Some dehumidifiers won’t operate in cold conditions, so if your basement does get particularly cold it will influence your choice of machine.

Dehumidifier Water Tank Size

The water tank is where the water extracted from the air is collected and stored. If the tank is too small you’ll be forever having to empty it. If it’s too large it might be a struggle to carry when it’s full. Some models have a drainage pipe that drains directly to a drain or sink and prevents the tank from filling and the machine from cutting out.

Capacity Rating

The capacity is basically a measure of how much moisture can be extracted in 24 hours. So you might see on the specs, water tank 10 litres, capacity 70 litres – This means it has the capacity to extract 70 litres of moisture every 24 hours but after 10 litres have been stored in the water tank, the unit will cut out until the tank is emptied.

Overall Room Size

To operate correctly and efficiently, the dehumidifier needs to be the correct size for the size of the area it’s going to be dealing with. To get the correct measurements for the total area of the room, just multiply the length by the width for example, a basement with a length of 30 feet and a width of 40 feet will have a total area of 1200 square feet. That looks like this:

30 x 40 = 1200

                                                       Length  X   Width = Square feet

Once you have the area, you can see just how much capacity your dehumidifier needs to have.   

Automatic Cut Off Function

A decent dehumidifier will have an automatic cut off that stops the machine once the water tank is full. But many have automatic sensors, that stop the dehumidifier once the room reaches the desired humidity (preset into the machine). Many will then restart if moisture levels rise again.

Defrost capability

Depending on the type of dehumidifier you buy, this might be a useful feature, but it’s not necessary with desiccant type dehumidifiers (more on this later). Basically if the internal components start to freeze a defrost function cuts in to prevent freezing and potential damage to the machine.

Brand Name

Buying a well-known, well-established company’s dehumidifier should ensure a reliable machine. Also any warranty or guarantee issued by the company will have some backing. Plus their customer support department will be able to help and advise you with any problems.


Most decent brands offer guarantees ranging from 1 to 3 years. Plus if you purchased a dehumidifier from a reputable company, they will honour the terms of their guarantee.

What Type Of Dehumidifier Should You Buy For A Basement?

To answer this fully, we first have to explain the way dehumidifiers work. We know they extract moisture from the air, and deposit the water into an internal  water reservoir or tank. But how does it achieve that extraction? Well there are 2 main ways, and they are sold under different type names, they’re both dehumidifiers, but operate in different ways. They are:

Refrigerant (Compressor) Dehumidifiers

These work on a similar principle to your fridge. A coolant is passed through a coil, as the moist, warm air touches the cold coil, the moisture condenses and drips into the water tank. This type work best in hot, steamy conditions. There’s more to it than that, but that explanation is sufficient for our purpose.

Desiccant Dehumidifiers

This type relies on a desiccant attached to a rotor that attracts the water from the moist air, as the rotor spins, the desiccant gets exposed to a heat source which dries it out and the water drips into a reservoir and the process continues. Desiccant dehumidifiers are usually quieter than refrigerant models too. Again that’s a simplified explanation but it’ll do for our purpose.

Which Type Of Dehumidifier Should You Choose For Your Basement?

You can probably see why you needed to find out just how cold your basement gets. The refrigerant type of dehumidifier can freeze if temperatures drop too low. That would stop them from operating, and possibly damage components and void any warranty. So if you have a particularly cold basement or if you just want to err on the side of caution, we advise you to go for a desiccant dehumidifier.

What Size Dehumidifier Do You Need For Your Basement?

Best Dehumidifier

As we said earlier, the size of the total area you want to treat will determine the size of the dehumidifier you buy. Using our simple equation above, calculate your total area and then use our handy guide below, to determine the best dehumidifier for your basement.

Total area in square feet (square metres)Capacity in litres (Pints)
500 (46 square metres)4.7 (8 pints)
1000 (93 square metres)6.6 (11 pints)
1500 (140 square metres)8.5 (15 pints)
2000 (190 square metres)10 (18 pints)
2500 (230 square metres)12 (21 pints)

Where To Buy A Dehumidifier Suitable For The Basement

All major retailers sell dehumidifiers, including Argos, Currys, Amazon, Appliances direct, Screwfix, B&Qs, John Lewis, Robert dyas, and many more.

Buying Tips

Having read all the information, and done the research, it’s important you don’t fall at the final hurdle. Follow our buying tips to be sure of the best model at the best price, with the best deal possible.

  • Have a specific type in mind
    Either refrigerant or desiccant, choose the most suitable type for your basement.
  • Know which features are important to you
    From noise level, tank capacity, auto cut off, defrost capability, size, etc, it’s your choice, and you are going to have to live with that choice for sometime.
  • Brand name and model
    You might have a particular brand you trust, or you might have a model in mind that has all the features you need. Don’t be swayed by a smooth talking salesman, stick to your guns.
  • Length of guarantee
    Some models have much longer warranties than others, if this is important to you, be sure to choose the right one. And again don’t be swayed.
  • Price
    You might be surprised at just how much you can save on the price of the model you choose just by shopping around. It’s easy to compare prices nowadays with the internet at the end of your phone.
  • Check reviews
    This can be especially handy if you are buying online, somewhere like Amazon print lots of customer reviews that give honest opinions on each model.
  • Take your time
    You’ve lived without it for this long, don’t rush out and buy the first one that comes along. Always compare like for like, sometimes another reputable company might have a very similar model at a substantially lower price.

Frequently Asked Questions

How big of a dehumidifier do I need for my basement?

How big a dehumidifier you need for your basement depends on the total area of your basement and how much humidity there is.

Where is the best place to put a dehumidifier in the basement?

The best place to put a dehumidifier in the basement is as near to the centre of the space as you can. So that it can achieve maximum air flow.

Will a dehumidifier get rid of basement smell?

A dehumidifier will help to get rid of smells in the basement, if they are caused by damp conditions. Otherwise you will need an air purifier.

When should I turn on my basement dehumidifier?

You should turn on your basement dehumidifier as soon as the humidity level rises above 50%.

What humidity should I keep my basement?

You should keep your basement at a humidity level between 30 to 50%.

What should my basement dehumidifier be set at?

Your basement dehumidifier should be set at anywhere between 30 to 50% humidity.

Why is my dehumidifier running but not collecting water?

If your dehumidifier is running but not collecting water it could be that the compressor has packed up.

Should I run a dehumidifier in my basement in summer?

You should run a dehumidifier in your basement in summer if the humidity level is above 50%.

Will mold grow at 55 humidity?

Mould will grow at 55% humidity and above.

Why is my dehumidifier blowing hot air?

It is perfectly normal for a dehumidifier to blow hot air. It uses heat to process the moisture. This has to be vented off.

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