Best Crawl Space Dehumidifier [Heavy Duty]

Dealing with moist air in your crawl space causing mold, mildew and wood damage? We’ve gone ahead and reviewed several crawl space dehumidifiers so you can find the best one for your crawl space.

The best crawl space dehumidifier I could find was the Aprilaire E100 Pro 100. It can service up to 5500 square feet, hook up into your HVAC system and it comes with a 5-year warranty.

If you’re on the go, then I’d recommend the ALORAIR 180PPD Commercial Dehumidifier so you can take advantage of its smart features and control it from anywhere.

If you’re looking to read the reviews, then check out the reviews below.

Let’s get started.

Our Top Picks

ALORAIR Commercial Dehumidifier 113 Pint
ALORAIR Commercial Dehumidifier 113 Pint
  • Fair price
  • 113 pints of absorption per day
  • Great for small crawl spaces
  • Auto-defrost for cold areas
Aprilaire E100 Pro 100 Pint Dehumidifier
Aprilaire E100 Pro 100 Pint Dehumidifier
  • 100 pints of absorption per day
  • Suitable for 5500 sq.ft
  • 5 year warranty
  • Energy Star certified
ALORAIR 180PPD Dehumidifier
ALORAIR 180PPD Dehumidifier
  • WiFi app, can control from anywhere
  • Stackable
  • 5 year warranty
  • Comes with a pump

Best Crawl Space Dehumidifier

Aprilaire E100 Pro 100 Pint Dehumidifier

  • Pints: 100 pints per day
  • Capacity: 5500 square feet
  • Warranty: 5 year warranty

A combination of features, warranty and coverage make this crawl space dehumidifier one of the best.

What I like

This is the best crawl space dehumidifier I could find with it being able to protect your home or basement with up to 100 pints of moisture absorption per day. With it being able to fit into your ducting system, you’ll have the flexibility to install it anywhere you’d like.

If you’re planning to keep this model mobile, you can opt for casters over leveling feet for no additional cost. The smart sensing technology detects when the humidity levels are getting high and cycles the power saving you electricity. The corrosion resistant aluminum coils also ensure longevity for years of use.

The front panel has an easy to use display that will notify you if there are any errors occurring. You won’t have to deal with any messy water trays, simply use a drain hose instead of emptying out a water tank. All the maintenance you need to deal with is cleaning the filter once a year and that’s it! It also plugs into a 120v outlet, making for super easy installation.

Reviewers mentioned when using this product, they were able to bring down the humidity in an area that no other dehumidifier could for years. They mentioned their units also didn’t give off a large amount of heat which is beneficial for heat sensitive environments.

What I don’t like

This unit is quite expensive and it doesn’t have a condensate pump. If you’re needing to pump the water out of a basement, you may want to look into the best dehumidifiers with a pump. This unit also doesn’t come with a remote control which will make it annoying to change the settings.

Why I’m recommending this product

This product is the end all be all for crawl space dehumidifiers. You’ll be able to enjoy up to 100 pints of dehumidification a day, it can hook up into your HVAC system in your crawl space or in your basement, whatever you prefer.

The digital control panel is super easy to use and it employs an air filter so you can enjoy not only improved humidity levels but also air quality in your home. I think that with the five year warranty, it’s going to be tough to beat this option.

If you are looking for a cheaper option or have a smaller home, the ALORAIR Commercial Dehumidifier might be a good alternative for you.

  • 100 pints per day absorption
  • 5 year warranty
  • Hooks into your HVAC system
  • Corrosion-resistant coils
  • Expensive 
  • Doesn’t come with a remote
  • Doesn’t have a pump

Also Great Crawl Space Dehumidifier

AlorAir Basement/Crawl Space Dehumidifier

  • Pints: 90 pints per day
  • Capacity: 2600 square feet
  • Warranty: 5 years

Have a smaller home but still want to employ a good crawl space dehumidifier? This is your pick.

What I like

This crawl space dehumidifier will be able to remove 90 pints of excess moisture from the air in your home per day. I love that you can also choose to include a condensate pump for a bit extra if you want to pump water out of a basement.

The automatic defrost feature makes for low temperature operation. The Aprilaire E100 Pro doesn’t offer auto defrost and is a much more expensive option! Perfect for anyone who’s living in colder climates and has a really cold crawl space.

This crawl space dehumidifier is also designed for energy saving as the low humidity levels in your home will make it much more enjoyable in your home at higher temperatures. The 5 year warranty is a great addition, protecting your investment.

I like that the top has handles, making it a bit easier to move around versus other models that are big, heavy blocks. Unlike more expensive crawl space dehumidifiers, you can opt to hook this unit up to an optional control panel so you can control this unit without having to make way to your crawl space.

What I don’t like

This crawl space dehumidifier is not going to be suitable for larger homes. It also doesn’t come with a remote control nor is it able to hook up to your HVAC system.

Why I’m recommending this product

While this unit doesn’t have the ability to hook up to your HVAC system, it does offer a substantially lower price. Not only that, but you also still get a 5 year warranty and can remove up to a comparable 90 pints of moisture per day.

This crawl space dehumidifier is going to be great for anyone who needs a commercial-grade dehumidifier and wants to set it and forget it. The additional condensate pump will make this unit great for basements and will prevent musty odors, wood rot, and excessive moisture.

If you need a larger unit for large crawl spaces or homes, the Aprilaire E100 is a great option.

  • Energy star certified
  • Automatic defrost
  • Corrosion protection
  • 5 year warranty
  • Not ductable
  • No remote (costs extra)
  • Filter is only MERV-1

Best Budget Crawl Space Dehumidifier

ALORAIR Commercial Dehumidifier 113 Pint

  • Pints: 113 pints per day
  • Capacity: 1200 square feet
  • Warranty: 5 years

This small sized crawl space dehumidifier is great for tight spaces.

What I like

You don’t need to spend a ton of money for an over-sized dehumidifier if you’re only working with an area of around 1200 square feet. This compact dehumidifier will be a great fit for small crawl spaces and will keep the humid air under control.

This unit can remove up to 113 pints per day with its gravity draining feature. You won’t have to deal with any messy water trays or tanks, simply set it and forget it. It can control the relative humidity from 36-90% and works down to 33.8F.

If your crawl space is uneven, the leveling feet on the bottom will let you get it perfectly even to prevent it from tipping over. The auto defrost function also keeps this unit from freezing up in colder weather. If you have a power outage, it’ll turn itself back on with its auto-restart function.

This unit also uses a unique tube evaporator which maintains the coil’s heat transfer ability and prevents freon leakage.

This dehumidifier unit also has the ability to hook up to a control panel or separate remote control. The filter is super easy to access on the side and is made out of dense MERV-8 which will keep the air quality in your crawl space clean.

What I don’t like

This unit isn’t made for larger crawl spaces. It also doesn’t come with a remote control and doesn’t have a condensate pump which makes it not a great option for a basement. The AlorAir Basement/Crawl Space Dehumidifier is a great alternative for that.

Why I’m recommending this product

This unit is great for smaller crawl spaces. It can service 1200 square feet, can control the humidity level in the entire crawl space, and has an auto defrost system while still working in low temperatures.

Considering the price of this unit, you’ll be able to enjoy all the features of more expensive units and keep your crawl space dry without any issue.

  • Budget price
  • Auto-defrost
  • Great for small spaces
  • 5 year warranty
  • Only suitable for 1200 square feet
  • No remote
  • Loud when running at full capacity

Best Smart Crawl Space Dehumidifier

ALORAIR 180PPD Commercial Dehumidifier for Crawl Space & Basement

  • Pints: 180 pints per day
  • Capacity: 2300 square feet
  • Warranty: 5 year warranty

Are you a professional that needs to control your crawl space dehumidifier while away? This is what you’re after.

What I like

What’s worse than having to have to go all the way to your crawl space to turn off/on your dehumidifier? With the included WiFi app, you’ll be able to turn the dehumidifier on/off, set the relative humidity, purge the water, locate your unit with GPS and many other great features. All while being anywhere!

This unit has a stackable design, so if you’d like to transport multiple units to different areas, you’ll have no problem with that. The WiFi app will also let you control multiple dehumidifiers at the same time.

This crawl space dehumidifier is also easy to use with the control panel on the front should you want to use it manually. The sides have cord and hose storage for your drain hose. The filter is also reusable, needing a quick rinse every 2-3 months depending on usage.

This unit also has a pump, allowing you to use it in a basement and pump the water out. You can also use this feature in a crawl space if you don’t have a drain near by.

What I don’t like

One reviewer had an issue with the WiFi app while others found it working perfectly. To remedy this, you’ll need to verify your account properly by clicking a link they send you in an email. If you follow the instructions, you should have no issue activating the WiFi application.

Why I’m recommending this product

Compared to most crawl space dehumidifiers that don’t offer smart features, this is going to be great for anyone who’s on the go a lot. It not only has a condensate pump making it great for basements, but it also is stackable making it easy to use multiple units at once.

It can remove up to 180 pints of moisture per day which is nearly twice as much as the Aprilaire E100 Pro that came in first.

Whether you want to stick this in a crawl space or basement, you’ll be able to control this unit from anywhere with the included app. This is definitely up there for best crawl space dehumidifiers and should be considered if you don’t want to go to your crawl space to fiddle with the settings every other day.

  • Smart features
  • Has condensation pump
  • Hose and cord storage areas
  • Handles for easy lifting
  • On the pricier side
  • Some issues with activation link for WiFi app
  • No auto-defrost function

Best Alternative Option

Kesnos 232 Pint Commercial Dehumidifier

  • Pints: 232 pints per day
  • Capacity: 8000 square feet
  • Warranty: 1 year warranty

If you have a large crawl space or want to use it in a basement, this is a great alternative crawl space dehumidifier.

What I like

I love that the intelligent controls will sense the relative humidity level and adjust the unit to control the humidity in the crawl space/basement. I like that the casters on the bottom will make it easy to transport as well.

You don’t need to worry about any water trays, it utilizes continuous drainage that you can hook up to a drain hose and empty in a water bin. This unit can also adjust the humidity levels down to 10% all the way to 98%, which is much more performance than the similarly priced ALORAIR Commercial Dehumidifier.

You’ll also be able to rely on up to 232 pints of moisture per day, which is twice the amount of the double priced Aprilaire E100 Pro 100. It employs all the features you’d expect like auto defrost, automatic humidistat control, and automatic restart.

This unit will be able to rid your area of excess moisture and protect your home from dust mites, bacteria and hot and humid air.

For maintenance, all you have to do is wipe down the water tank and clean the air filter once a month using a rag and water. Reviewers mention that when they had an issue using this product, they had no issue with contacted Kesnos’ customer service and receiving help.

What I don’t like

This unit isn’t made for crawl spaces so it may not fit if you’re working with a small crawl space. It also doesn’t come with a remote control and is going to be a bit more bulky than other crawl space dehumidifiers.

Why I’m recommending this product

Crawl space dehumidifiers are going to be much more expensive while not offering the same absorption this standard dehumidifier does. If you’re looking for the best dehumidifier overall, this unit is a great choice to consider.

If you are working with a small crawl space, then I would recommend the ALORAIR Commercial Dehumidifier instead.

  • 232 pints per day
  • 8000 square foot capacity
  • Intelligent controls
  • Able to control humidity down to 10% and up to 98%
  • Not going to fit in small crawl spaces
  • Only 1 year warranty
  • Has to be emptied if you don’t use continuous drain

What to look for in a crawl space dehumidifier?


Capacity is important because you’ll want a crawl space dehumidifier that can service the size of your crawl space. It’s important that you keep in mind manufacturers over-estimate their products’ capabilities in the real world. This is because they test their units in optimal conditions.

I can promise you that your crawl space isn’t going to be optimal for any type of dehumidifier! It’ll be put to the test against hot and humid climates and will need to work extra hard, so it’s important that you get one that’s rated for over the size of the space you have in mind.


If you’re working with tight spaces, it will be difficult to fit a regular sized dehumidifier. That’s why it’s important to double check the size of your crawl spaces before going ahead and purchasing the best crawl space dehumidifier for your space.

A smaller sized option would be the ALORAIR Commercial Dehumidifier. If your crawl space is super small, then you may want to look into portable crawl space dehumidifiers so yours will fit.


Features like auto-restart for a power outage, control panel, humidistat, and air filter are all features that will make your quality of life better. Corrosion resistant coils, built in humidistat and relative humidity display are also features you should look for to get the most out of your dehumidifier.


Crawl spaces are not normally level, so it’s important to pick a unit that has leveling feet so you can keep your unit from tipping over.

Pump/Continous drainage

Most of the units will be able to set up a continuous gravity drain, but that will only work if you have a way to set up the gravity portion of the drain. If you want to move the water in an upward direction, you need to look for one with a condensate pump. Normally these are useful in basement applications.


When purchasing the best crawl space dehumidifier, it’s paramount that you get a warranty for the long term. Most of the units on this list offer 5 year warranty, and I wouldn’t get one without it. You may encounter issues and servicing your expensive unit is going to be vital for continuous operation.


If you live in a climate that suffers from colder temperatures, you’ll want a unit with auto defrost. This way, the coils won’t freeze up and you’ll be able to control the humidity levels in your home even during the winter.

How to go about crawl space dehumidifier installation?

Depending on the type of crawl space you have, you’ll have a few different installation options. It’s not recommended on installing your dehumidifier near the door. The optimal position will be in a central location.

One issue you’ll find is that if you need to service your unit, you’ll need to get to your unit! That’s why if your central location is a bit away and going to be an annoyance to get to, you can install it a bit closer for ease of access.

You can hang your crawl space dehumidifier if you wish and can check out the installation process in this video:

If you aren’t comfortable installing it yourself, you can opt to call our technicians who will install it without any issue in a jiffy.

Can I use a normal dehumidifier in a crawl space?

I would not recommend putting a home dehumidifier in your crawl space. It’s not going to be able to have enough capacity to service the area, not to mention you’ll need to come and empty the water tank every few hours! The other option if your crawl space is big enough is to check out the other larger commercial grade dehumidifiers.

Final Thoughts

If you’re after whole-house dehumidification, then I would recommend the Aprilaire E100 Pro 100. It can service up to 5500 square feet, hook directly into your HVAC system or work as is.

If you’re on a budget, then I would also recommend the ALORAIR Commercial Dehumidifier. It’s got all the great features you’d expect out of a more expensive unit, but it does only service 1200 square feet so keep that in mind.

About Roy Cohen

Roy Cohen has a burning passion for heating, cooling, and ventilation. He aims to help you save money on expensive repairs and bring you the best HVAC products. He has years of experience behind him in HVAC repair and garage maintenance.

You can find Roy at his LinkedIn or his email: [email protected]

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