Buyer’s Guide

Best Crawl Space Dehumidifier Of 2021

Crawl Space Dehumidifier Reviews, Types, Advantages, Tips, Usage, And More…

Ever wonder what your crawl space smells like? Well, if you don’t have a dehumidifier in there, it probably smells pretty bad. Not only will this cause mold to grow on the floor and walls of your home, but it can lead to all sorts of other health issues as well.

A crawl space dehumidifier is a device that collects moisture directly from the air in your home’s lowest level. Installing a dehumidifier in your crawl space can be the perfect way to increase your home’s comfort level, especially if you live in an area with cold winters and plenty of humidity. When the moisture is trapped in the crawl space below your home, it can lead to a number of moisture-related problems for you and your family. For example, mold and mildew growth can cause allergies and respiratory issues for your family. In addition, excess moisture in a crawl space can lead to damage to the structure of your home.

If you’re looking for the perfect crawl space dehumidifier, then this blog post is just what you need. Here we will explore the best dehumidifier for crawl space available in the market and help you make an informed decision. We’ll also go over some of their pros and cons to give you a better idea of what may work best for your home. Finally, we’ll wrap up by highlighting our favorite models so that you can get started with your search right away!

Quicklist Of Crawl Space Humidifier, in case you don’t have time to read the full article.

Top 9 List

9 Best Dehumidifier For Crawl Space

Definition

What is a Crawl Space Dehumidifier

under house dehumidifier
Definition of Crawl Space Dehumidifier

A crawl space dehumidifier also called a “potential humidity” controller or humidistat is a device that controls the relative humidity inside and around your home. It can be used to dehumidify crawl spaces, basements, attics, or various other places in which you’d like to maintain a constant level of moisture. A dehumidifier for crawl space is a simple device that controls humidity with a set temperature. They include a large metal pan or reservoir. Water passes into the pan, where it sits until it evaporates and disappears.

Crawl space dehumidifiers are usually placed in low-lying areas of your home, like basements or crawl spaces. You connect them to your ventilation system via ductwork. The unit has a temperature gauge that allows you to maintain an ideal level of humidity. If the relative humidity within your home reaches a certain point, the dehumidifier for crawl space kicks on and cools the air to prevent condensation from forming. Dehumidifier for garage and crawl space works similarly.

It keeps your home at a steady temperature, without the scorching heat or freezing cold that can damage your property. You can also use a dehumidifier for crawl space to control humidity outside the home. If you live in an area with high annual rainfall, or if your home doesn’t have a drainage system, excess moisture in your crawl space can cause mold and mildew to appear. This can also lead to wood rot and other structural damage that could be costly or even dangerous to repair. Crawl space dehumidifiers are essential for maintaining a healthy, safe living environment.

Types

Types of Dehumidifiers Suited for Crawl Spaces

Refrigerant Dehumidifiers

A refrigerant dehumidifier for crawl space works much the same way your refrigerator does. It consists of a compressor, an evaporator coil, and a condenser coil. As the compressor turns on it forces the warm air in your home through the coils which cool them and remove any excess moisture in the process. The air is then returned to the room. They are very quiet and run continuously while you are at home or asleep so they maintain a constant level of humidity throughout your house while you are asleep, which is critical for preventing mold growth.

Bucket Based Dehumidifiers

A bucket-based dehumidifier for crawl space works by placing the unit in a room with a small bucket and allowing it to collect the water in the air. You must remove and empty the bucket frequently, usually every couple of days. An advantage of this type is that they are very affordable and quiet and they can be placed in any room. The major disadvantage is that you will spend a lot of time emptying buckets, especially if the humidity is high.

Gravitational Force Dehumidifiers

These dehumidifiers are usually installed in basements or crawl spaces by professionals because they require drilling holes into walls to allow water to drip directly into the bucket. These units are effective but not as quiet as most refrigerant or built-in dehumidifiers. Because they are installed outside of your rooms you don’t need to worry about them overheating and possibly fire while running in a small space for an extended period of time like you would with built-in dehumidifiers. These units are also more affordable than refrigerant dehumidifiers, but they don’t cool your home in the hot summer season.

Built-in Drain Pump Dehumidifiers

A built-in drain pump is installed in a closet or other out-of-the-way space and uses a small pump to send water out the drainage system of your home. These crawl space dehumidifier with pump units are similar to refrigerant under house dehumidifiers except that they do not need a cool place for the condenser coils since it is inside your home, as long as you have adequate ventilation for them. They can also be used in spaces without windows and can be located almost anywhere in a room. The major disadvantage is the increased cost of installing a drainage system that is compatible with your existing plumbing unless you are using a tank-less water heater.

Detailed Product Review

Detailed Product Review Of The Best Crawl Space Dehumidifier

1

CADPXS Sandryer Crawl Space Dehumidifier with Pump and Drain Hose

Best Crawl Space Dehumidifier with Pump

CADPXS Sandryer Crawl Space Dehumidifier with Pump and Drain Hose

 out of stock
Amazon.com
as of 27/09/2021 10:58
  • Large Dehumidifier – This dehumidifier is a large capacity unit that removes up to 180 pints per day. The internal pump automatically removes collected water, and the digital display shows you how much water has been removed in real-time.
  • Built-in Pump – A built-in pump allows for easy drainage of collected moisture, so you don’t have to worry about finding a place to drain your dehumidifier. Simply connect the included hose to the dehumidifier’s built-in pump and run it outside or into a drain!
  • Real-Time Monitoring – This crawl space dehumidifier is equipped with an LCD screen that displays humidity levels in real-time. You’ll know exactly how much moisture is being extracted from your crawl space at all times!
  • High-efficiency– This is a High-efficiency dehumidifier for crawl space. It can effectively remove moisture from the air in your crawl space, basement, or other areas where dampness is an issue. The unit features a built-in pump that pumps out the extracted water to drain pipes.
Why we liked it
  • It is too easy to install.
  • It comes with a control panel with an easy-read LCD screen.
  • It comes with a handle design that makes it easy to move from one place to another.
  • It automatically shuts off once the ideal humidity level is reached.
  • It has a very compact design.
Point of Concern
  • It is a bit heavy.
2

Aprilaire Crawl Dehumidifier for Crawl Spaces

Best Dehumidifier For Crawl Space Under House

Aprilaire Crawl Dehumidifier for Crawl Spaces

$1,142.05  in stock
2 new from $1,142.05
Free shipping
Amazon.com
as of 27/09/2021 10:58
  • Long-lasting – This dehumidifier is designed to last for years. The corrosion-resistant aluminum coils prevent rusting and ensure that the unit will continue to work at full capacity.
  • Kills virus – The Aprilaire Crawl Dehumidifier is a powerful air cleaner that removes up to 9 gallons of water from your crawl space each day, which helps keep airborne viruses from spreading throughout your home.
  • Auto on/off – This feature allows you to set the humidity level in your crawl space and have the dehumidifier automatically turn on when it reaches this level. You can also manually turn it on or off as needed with the convenient remote control.
  • Removes 70 pints daily – Remove up to 70 pints of moisture from your crawl space every day with its powerful dehumidifier, which will help eliminate mold and mildew growth, reduce dust mite populations, and improve overall air quality in your home.
Why we liked it
  • It can cover up to 3800 sq. ft.
  • It is most ideal for crawl space.
  • It is highly durable and long-lasting.
  • It minimizes airborne viruses.
  • It can remove up to 70 pints of water per day.
Point of Concern
  • It is a bit noisy.
3

BaseAire Energy Star Dehumidifier for Crawl Space

Best Cheap Crawl Space Dehumidifier

BaseAire Energy Star Dehumidifier for Crawl Space

$699.66  in stock
Amazon.com
as of 27/09/2021 10:58
  • Saves Energy – Save up to 70% on your energy bill with this energy star dehumidifier. Reduce moisture and mold in your crawl space, basement, or garage.
  • Easy To Use – Auto defrost operation means you never have to worry about frost build-up. The dehumidifier will automatically shut off when the internal temperature reaches 45 degrees Fahrenheit and restart once it cools down to 40 degrees Fahrenheit.
  • Auto Restart – If power is interrupted due to a storm or power outage, the dehumidifier will automatically restart when power is restored. No need for manual resetting!
  • Quiet Dehumidifier – This Energy Star-rated dehumidifier operates at just 46 decibels, making it perfect for homes with bedrooms above the living area where noise can be an issue. The optional remote control allows you to operate the unit from another room without disturbing those who are sleeping upstairs! Great for children’s rooms!
Why we liked it
  • It features an automatic drainage system.
  • It comes with a rare earth alloy tube evaporator.
  • It turns on and off automatically.
  • It is too easy to use and install.
  • It makes very little noise.
Point of Concern
  • It is not that long-lasting.
4

Eco Pro 50 Pint Small Portable Desiccant Dehumidifier for Crawlspace and Basement

Best Portable Crawl Space Dehumidifier

Eco pro 50 Pint Small Portable Desiccant Dehumidifier for Crawlspace and Basement

$1,439.00  in stock
2 new from $1,439.00
Free shipping
Amazon.com
as of 27/09/2021 10:58
  • Dehumidifier With Pump – The Eco Pro 50 Pint Small Portable Desiccant Dehumidifier is the ideal solution for your crawlspace, basement, or garage. This dehumidifier with a pump will remove up to 50 pints of moisture from the air every 24 hours.
  • Mount-It Anywhere – The Eco Pro 50 Pint Small Portable Desiccant Dehumidifier can be mounted on a wall or placed on a flat surface. Its compact design makes it easy to move and store when not in use.
  • Self-Regulating Desiccant Dehumidifier – This dehumidifier with pump automatically maintains optimal humidity levels by continuously monitoring the relative humidity inside the space and activating only when necessary. It also features an automatic shut-off feature that turns off the unit once it has reached its desired humidity level so you don’t have to worry about wasting energy while you’re away!
  • Quiet Compact Desiccant Dehumidifier – These desiccant dehumidifiers are so quiet that you’ll forget they’re running! They’re perfect for bedrooms, bathrooms, basements, laundry rooms, or any other area that needs moisture removal.
Why we liked it
  • No water containers need to be emptied.
  • It does not require any drain hose.
  • It operates quietly.
  • It has a very compact design.
  • It can self regulates itself.
  • It does not produce any water vapors.
  • It Removes molds from your crawl space.
Point of Concern
  • Not ideal for a very large space.
5

AlorAir Crawl Space Dehumidifiers with Pump and Drain Hose

Best Dehumidifier for Crawl Space Home Depot

AlorAir Crawl Space Dehumidifiers with Pump and Drain Hose

$2,692.48  in stock
Amazon.com
as of 27/09/2021 10:58
  • Energy Star Certified – AlorAir crawl space dehumidifiers are energy star certified, saving you money on your electric bill.
  • Heavy-Duty Condensate Pump – The heavy-duty condensate pump is designed to pump out water from the crawl space to a drainage hose for easy drainage.
  • Automatic Defrost – The automatic defrost feature prevents damage from ice buildup by automatically defrosting the unit when it detects ice build-up in the evaporator coil.
  • Remote Control – This feature allows you to control all of the functions of your AlorAir Crawl Space Dehumidifier without having to get off your couch!
  • Save on Costs– AlorAir crawl space dehumidifiers are designed to save you money. This high-quality and energy-efficient crawl space dehumidifiers will pay for themselves in no time. You’ll be able to enjoy the comfort of your home with a lower energy bill!
Why we liked it
  • It comes with a built-in pump.
  • It comes with a remote control system.
  • It is too easy to install.
  • It is very easy to use.
Point of Concern
  • The user guide is not up to the mark.
6

LUKO Commercial Dehumidifier with Pump Drain Hose for Crawl Space.

Best Commercial Dehumidifier for Crawl Space

LUKO Commercial Dehumidifier with Pump Drain Hose for Crawl Space.

 out of stock
Amazon.com
as of 27/09/2021 10:58
  • Easy to move from one room to another– The built-in wheels allow you to move the dehumidifier around the house easily without hassle. It is lightweight so moving it from room to room is a breeze! If you have a large space that needs dehumidifying, simply unplug the hose from one unit and plug it into another unit as needed!
  • Compact Design– This dehumidifier is designed to be compact and portable for low clearance spaces. It’s easy to move around your house or apartment without having to worry about damaging the walls. The dehumidifier can be used in basements or crawlspaces where it is not possible to install a full-sized unit. The drain hose allows you to connect the unit directly into a floor drain so that water does not collect on the floor of your home.
  • Easy operation – just plug it in and turn it on! No need for any complicated installation procedures. Just place the dehumidifier in an area where there are no obstructions (such as furniture) underneath it and let it do its job! You will see how much water this machine collects over time!
  • Reliable Design– Reliable design to keep your crawl space dry and mold-free. This dehumidifier is designed to be used in the basement or crawlspace of a home. It has an external pump that can drain the water outside, away from your home. The pump can also be hooked up to a sump pit so that you don’t have to go outside every time it needs to be emptied.
Why we liked it
  • It is a heavy-duty crawl space dehumidifier.
  • You can control the humidity of your crawl space effortlessly.
  • The HGV defrost features allows it to work at low temperatures.
  • It is very easy to install and use.
  • You can monitor humidity levels.
Point of Concern
  • It is a bit expensive.
7

BlueDri Industrial Commercial Dehumidifier with Hose for Crawl Spaces in Homes and Job Sites

Best Industrial Crawl Space Humidifier

BlueDri Industrial Commercial Dehumidifier with Hose for Crawl Spaces in Homes and Job Sites

$1,188.79  in stock
2 new from $1,188.79
1 used from $973.85
Free shipping
Amazon.com
as of 27/09/2021 10:58
  • 225 Pint Dehumidifier – This 225 pints dehumidifier is perfect for commercial and industrial use. It’s convenient to use in homes with crawl spaces or basements.
  • Water Damage Restoration – If your home has experienced water damage, this dehumidifier will help restore the moisture levels back to normal. It removes excess moisture from the air that can lead to mold growth and other health issues.
  • Automatic Water Pump – No need to empty the water tank manually. The pump will automatically pump out the water when it reaches a certain level.
  • Digital Panel – Easy to operate with a digital panel, and displays humidity level, temperature, timer, and other information.
Why we liked it
  • It comes with a drain hose.
  • It comes with a washable filter.
  • It is very easy to use.
  • The filters of these dehumidifiers are reusable.
  • It is ideal for large crawl spaces.
Point of Concern
  • Not ideal for small crawl spaces.
8

Midea Cube 50 Pint Dehumidifier with Pump for Crawl spaces

Best Residential Crawl Space Dehumidifier

Midea Cube 50 Pint Dehumidifier with Pump for Crawl spaces

$299.00  in stock
2 used from $275.08
Free shipping
Amazon.com
as of 27/09/2021 10:58
  • Small Size Big Capacity – With its lift and twist design, the Midea Cube 50 Pint Dehumidifier with Pump can be moved easily from room to room or placed in hard-to-reach areas. It has a bigger capacity than other dehumidifiers of similar size.
  • Set It And Forget It – The Midea Cube 50 Pint Dehumidifier with Pump automatically shuts off when the desired humidity level is reached so you don’t have to worry about turning it on and off again. Just set it and forget it!
  • Compact Design – This dehumidifier has a smaller footprint than other units of similar capacity which makes it ideal for use in crawl spaces, basements, garages, laundry rooms, and more!
  • 4,500 Square Feet Of Coverage– It is able to collect 50 pints of water a day and adjust humidity from 35% to 85%.
Why we liked it
  • It has a very compact design.
  • You can control it with a smartphone or voice assistant.
  • It is too easy to install.
  • It efficiently removes humidity from the air of your room.
Point of Concern
  • It is a bit heavy unit.
9

COLZER Dehumidifier with Pump For Crawl Spaces

Best Home Crawl Space Dehumidifier

COLZER Dehumidifier with Pump For Crawl Spaces

 out of stock
Amazon.com
as of 27/09/2021 10:58
  • Dehumidifier with Pump– It comes with an internal heavy-duty condensate pump of 15 ft drain height connecting with a 17 ft wrinkle-free long drain hose. It is a self-draining industrial dehumidifier that will automatically drain the condensation water.
  • Plug-and-go Operation– you just need to do plug it in and turn it on, no further manual adjustment is required.
  • Real-Time Monitoring– The LCD screen displays the humidity level and temperature of both the inlet and outlet.
  • Portable– It comes with large semi-pneumatic wheels and a rigid handle that makes this large dehumidifier portable.
Why we liked it
  • It is too easy to use.
  • It can be installed easily.
  • It is ideal for large crawl spaces.
  • You can monitor real-time humidity levels.
  • It features a heavy-duty condensate pump.
  • It comes with HAV defrosting for low-temperature operation.
  • It is easy to move.
Point of Concern
  • It is a bit expensive.

Benefits of Crawl Space Dehumidifier

Why Your Crawlspace Needs a Dehumidifier

crawl space dehumidifier with pump
Advantages of Dehumidifier for your Crawl Space

1. Safety

Crawl spaces are often used as storage areas. There is so much that you use and need to be stored down there! However, because of the moisture levels, items such as wood and paper become moist when they should be dry. This causes them to either rot away or causes mold growth on them which then gets into your home through air circulation (if not quickly cleaned).

Under house dehumidifiers help maintain proper temperatures inside the crawl space by regulating humidity levels at around 50%. Anything above this level will cause wood to rot and paper items to become damaged or moldy. These crawl space dehumidifiers allow you to properly store your food and other perishable goods in the area without worry about them spoiling prematurely.

2. Cost Savings

They can save you money on your energy bill every year by removing moisture from the area. This moisture is often absorbed by various items stored in the crawl space and causes them to deteriorate quickly or rot entirely. By keeping the humidity low as possible, your home will be protected when it comes to storing perishable goods such as wood and food supplies, personal papers, clothes, books, and much more!

They also help prevent mold and mildew from forming as quickly as they would in a crawl space without one. This can save you money in the long run, including having to replace goods that were ruined from moisture damage or certain health-related illnesses from mold poisoning.

3. Energy Saving

Crawl spaces that are regularly enclosed with a crawl space dehumidifier are more energy-efficient than ever before! The under house dehumidifier removes moisture from the air naturally, lowering humidity levels and your energy bills without much effort. This is also great for preventing mold growth which can increase allergies around the home as well as damage many surfaces if left unchecked over time.

High-quality units typically have an automatic shut-off function when they reach their capacity, which prevents water overflow onto floors or carpets in the crawl space or even better, onto your floors inside! You will be amazed at the cost savings in energy bills as well as the stable humidity levels that you will have throughout your entire home.

4. Environmental Conservation

Many people do not think about the impact that our daily activities have on the environment. This includes using energy in such a way that it damages nature around us, especially polluting waterways that run into our oceans and lakes. Dehumidifiers are an eco-friendly solution for maintaining humidity levels inside your crawl space while also keeping them safe from excess moisture or water damage.

5. Health

They can help improve air quality by filtering out harmful gases along with stopping mold spores from growing inside of your home onto family members or pets! These crawl space dehumidifiers will work to decrease allergens so you can breathe easier throughout your home each day.

You will not have to worry about mold or mildew growing on items you are storing in the crawl space and they will not become damaged prematurely by excess humidity. If you live in a humid climate, this is an easy way to help improve your family’s health while saving money on your energy bill!

Features of Crawl Space Dehumidifier

1. Defrosting in crawl spaces

It is an important aspect when creating these crawl space dehumidifiers because if there isn’t one most would not operate at all or if so only for few minutes until some major damage happens.

These defrosting systems usually consist of a heating element, timer, and thermostat. They are relatively cheap and easy to install so you’ll probably want one if your crawl space dehumidifier doesn’t have this feature already. In addition to that, the good news is that they are not prone to failure which means your system will operate even during wintertime bringing many benefits for years without any problems or interruptions.

2. Collection Pump

Though it is a nice feature, some people might feel it is unnecessary especially since those crawl spaces with high humidity levels can easily be drained through floorboards alone without the need for using a pump system. However, we strongly suggest you get one because these pumps come in handy when there is no drainpipe available at all.

When looking for a pump keep in mind that you will require one that is not prone to failure, compact, and easy to install. You must choose the dual capacity unit because it comes with an integrated control panel which means it is wireless.

Most importantly, this pump is highly energy efficient using only 0.38 kWh per 1000 liters of water pumped per hour! The remaining feature we took into consideration when choosing this model was its ability to adapt automatically depending on the water level so regardless if there are many or little amounts of air pockets inside your pipes, the pump operates efficiently every single time without any problems whatsoever.

3. Filtration

The most beneficial thing about these dehumidifiers is the fact that they have a filtration system which means that moisture content in the air will be reduced to an absolute minimum. We highly suggest you get one with an activated carbon filter because it does not require replacement or maintenance at all and has the best filtering properties.

Activated carbon filters are also more effective than other filters on the market like electronic ones because they contain many little pores which help absorb even tiny odors as well as gases thus ensuring fresh, odor-free air in your crawl space.

With features such as automatic defrosting systems, water pumps, and filtration capabilities these crawl space dehumidifiers prove to be worth every penny spent on them. So if you wish to reduce humidity levels in your space no matter how high they are, you should consider investing in one since they will bring many benefits.

How Does a Crawl space Dehumidifier Work?

The science of crawl space dehumidification is very straightforward. The unit generates warm air that dries out the air near the crawl space floor so that moisture can no longer condense there. This drying process removes moisture from the crawl space air and reduces humidity levels to a point that will not support mold growth.

Granted, this happens in an indirect manner by satisfying the first two conditions of what experts call “the wet ceiling state”. Successful dehumidification requires more than just lowering humidity levels below saturation, however. It also requires maintaining those lower levels long enough for all excess moisture to leave the crawl space before it has a chance to return with outside moisture and/or begin seeping back up through your home’s foundation walls.

Home crawl space dehumidifiers are best operated continuously for at least four weeks, and longer if your crawl space is larger than 2,000 square feet or so. Operation continues as long as conditions remain dry enough. If the unit ever shuts off automatically, it could mean that there’s too much moisture in the air outside of your home to allow it to operate properly. It may also be a sign that you need to clean the air intake grille in front of your unit periodically.

As already stated above, a home crawl space dehumidifier uses an exhaust hose connected to some form of venting (either directly through an existing duct system or via a small-diameter hole drilled through the wall) can greatly help reduce moisture penetration into your home during the dry months of the year. However, one important fact must be kept in mind when using such a unit: air movement is still required to bring fresh indoor air into contact with the crawl space floor and remove moisture-laden air there.

If you are not careful about this and allow your crawl space dehumidifier to operate continuously without any form of ventilation, it can raise humidity levels back up to or well above normal. This problem usually happens because water vapor released by your dehumidifier’s compressor condenses on cold surfaces near the area where its exhaust hose vents out of your home if no venting is installed between the outlet hose (or hole) and outside air.

A similar combination of warm, moist outdoor air flowing over colder areas near the ground and condensing there is why crawl space dehumidifiers in some parts of the country become icing hazards during winter cold spells. However, as long as you provide adequate ventilation for your crawl space (as discussed above) when using a crawl space dehumidifier, this will not be a problem. The unit’s exhaust hose should always vent into an area where outside air moves freely through it (such as through a screen or wire mesh covering on an existing vent pipe).

When Do You Need a Crawl Space Dehumidifier

If you have a crawl space, you’re probably familiar with the challenges it presents. Whether it’s dampness or simply being hard to reach under the house to work on repairs or maintenance, there are many reasons why an outdated crawl space can be a hassle and possibly even a danger to your family. One popular solution for crawl space problems is a crawl space dehumidifier, which can help with many of the issues that come along with a damp crawl space. Is it time for one? Here are some signs that you should invest in a dehumidifier:

  1. Stagnant Water

If you see standing water in your crawl space then it’s likely that a dehumidifier would be helpful. Crawl space dehumidifiers are designed to remove moisture from the air and this will help eliminate stagnant water and keep your crawlspace dry. This is the most common use for a crawlspace dehumidifier, and it’s a big reason why they’re so effective.

  1. Water Vapor

In addition to removing standing water, a dehumidifier will also remove the water vapor in the air. Water vapor as you crawl around under your house is very uncomfortable. The humidity can make it hard for you to breathe and feel comfortable while working down there. A dehumidifier will help you get rid of the water vapor so that it’s easier to breathe, and it will remove the discomfort from being in a humid crawl space.

  1. Warm Air Inflow

Crawl spaces are dark areas that have no natural ventilation and little air circulation. If warm air is allowed to enter, the floor will be unable to maintain a stable temperature. As a result, you’ll have trouble getting the space to get comfortable and your water heater may not work properly since it won’t be able to provide enough heat. A dehumidifier can solve this problem by removing warm air from underneath the foundation so that cold air will stay in place instead of being pushed out.

  1. Problems With The Foundation

If the foundation to your home is showing signs of damage, then a dehumidifier could be just what you need to save it from further deterioration. Wood rot, mold, and other structural issues are common problems with crawl spaces that can quickly progress into something much more serious. A dehumidifier can help you keep your foundation healthy by keeping it dry and preventing the elements from causing further damage.

  1. Condensation

If there is a nearby water source such as a lake, streams, or ocean then you could experience condensation in your crawl space. This occurs when something cools down significantly and releases moisture into the air. The moisture in your crawl space is going to attract mold and this could be a real problem if you’ve been experiencing issues with mold growth. A dehumidifier can reduce the moisture and the air temperature so that it doesn’t have an opportunity to condense, keeping your crawl space dry and clean.

Cost Of Crawl Space Dehumidifier.

A dehumidifier in a crawl space can surely be expensive but it is cheaper than living with the problems that come from this dampness. In a long run, you can definitely save more money with a dehumidifier.

The cost of the dehumidifier depends on its size and the efficiency of the appliance. There are crawl space dehumidifiers that are as small as 6 pounds and can be bought for below $50. Others are big, bulky, and expensive but they have larger coils and are more efficient in keeping out moisture than those that are small and light.

You have to pay much for the bigger dehumidifiers. You should also consider the energy efficiency of the dehumidifier when buying one. The higher the energy efficiency, the more cost-effective it is for you to buy this appliance.

Dehumidifiers that are desiccant type have the lowest cost while refrigerant dehumidifiers are more expensive. In choosing a dehumidifier for your crawl space, you have to consider your financial capability. You should also evaluate the property value of the house and if the value will be affected if you buy a desiccant dehumidifier.

How to Install a Crawl Space Dehumidifier

The process of the Crawl Space Dehumidifier Installation is as follows:-

  1. keep your crawl space clean & dry

Make sure the floor of the crawl is free from liquid or water, and remove all the debris or dirt, as these can cause the presence of mold and bacteria

2. Locate the Perfect Place for the Dehumidifier

Find the perfect place to put the dehumidifier in your crawl, based on its requirement, otherwise, it may fail to work. Generally, the dehumidifier should be placed in an area that receives a lot of airflows.

3. Turn Off Power Source & Drain Hoses

Turn off the power supply of the dehumidifier, and drain out hoses. In the case of a gas-powered dehumidifier, turn off the gas supply.

4. Position the Dehumidifier

Place dehumidifier on a flat surface with wheels or casters. Roll the dehumidifier to its place where you have planned to put it, and lock the wheels.

5. Connect the Accessory Power Cord

Connect the accessory power cord from the dehumidifier to an outlet. Make sure that you plug it into a GFCI-protected outlet and check to see if the power is on at the outlet.

6. Set Humidity Control Setting

Set the humidity control using the controller, and adjust it to your desired setting.

7. Adjust Humidity Gauge

Adjust the gauge to your desired humidity level, and it shows the exact moisture content percentage in the crawl.

8. Run Pump & Fan

Once you are done with all the settings of the dehumidifier, turn on the pump and fan to let it run. Let it run for a few minutes, so that dehumidifier can get adjusted and leveled; and the air inside your crawl space becomes dry.

9. Wait for the Results

Give your dehumidifier time to run and show you the actual results. If it exceeds your expected level, you can alter the settings and again, run it for a few minutes.

10. Clean the System Regularly

If you feel that there is excessive moisture in the air in your crawl, you need to clean the dehumidifier and have it checked. You can also clean the filter of the machine to improve its performance.

11. Maintain the Humidity Level

Since the installation process of the Crawl Space Dehumidifier is complete, your work doesn’t end here. You need to have a check on the humidity levels of your crawl space and maintain it.

How to Get Rid of Moisture in The Crawl Space.

  • Turn on the air conditioner in the crawlspace.
  • install an attic fan that runs 24/7 in the crawlspace.
  • leave the window open in warm months to allow for air exchange.
  • paint all wood with a water sealer.
  • install a sump pump in the crawlspace.
  • do not cover the window that is used for air exchange.
  • do not cover the attic vent fan unless you live in a mild climate and have adequate cross ventilation.
  • do not cover the floor of the crawlspace.
  • use a humidistat to turn off the humidifier when humidity reaches 50%.
  • use a humidity monitor to keep track of the relative level.
  • leave a 2″ gap around all foundation walls.
  • leave at least 6″ space between the first course of the block and the ground to allow for drainage.
  • insulate basement floor if temperatures are below 70 degrees. Sprawl out the R-value under the whole house and leave a 2″ gap around the outside of the basement.
  • if there are vents installed in the crawlspace, install a screen over them or better yet, cover them up with cement.
  • clean the dirt from around all exterior walls and remove any outside storage.
  • make sure that no wood is used as exterior siding close to the ground. Use brick or cement block instead. It will breathe and not cause moisture accumulation.
  • make sure the roof is tight before starting to use the house as a storage area.

Crawl Space Dehumidifier Maintenance Tips

Dehumidifiers are one of the best investments for moisture removal and energy savings within a crawl space. Here is some helpful information on maintaining your dehumidifier:

  • The defrost drain tube should be checked periodically to make sure it’s not blocked with dirt or other debris, because the first sign of trouble is when the dehumidifier stops running. This tube should be cleared out every 3-6 months depending on how much your crawl space is used. Also, make sure you are using distilled water in the reservoir to avoid damaging the coils and other components with hard water deposits.
  • The easiest maintenance is just to vacuum up any spider webs or other debris. Other than that, there’s not much to do unless the unit breaks down. The fan will probably make a little noise, but it will still work fine so long as you are running it year-round and keeping the humidity levels below 60%.
  • It’s also important to note that the vents should be unblocked for proper airflow, and no more than one dehumidifier should be run in a crawl space. This will help to ensure your unit works correctly and doesn’t overheat or get damaged.
  • In addition to the maintenance stated above, water drainage and humidity levels are crucial in maximizing your dehumidifier’s performance. We recommend that you inspect your crawl space for any signs of moisture damage and have a professional perform regular checks for leaks or mold problems. If this is found, take the proper steps to repair them as soon as possible.
  • Consider using a radon sump pump in conjunction with your dehumidifier to ensure that water is completely removed from the crawl space. This will help prevent the formation of mold or mildew, which can be very harmful to those who live and breathe in these environments.

Crawl Space vs. Basement Dehumidifier

There are few differences between basement dehumidifiers and crawl space dehumidifiers. The first is that a basement dehumidifier will be designed to handle the high humidity levels in your home. Crawl space dehumidifiers, on the other hand, must be placed outside of the crawl space due to their design. A crawl space dehumidifier would not be able to efficiently operate in damp conditions without being exposed to enough air to cool the coils.

Basement dehumidifiers often come with an automatic humidity sensor, and they will run until the desired humidity level has been reached. Crawl space units do not have this feature because it is unnecessary in their case. Crawl spaces are more open than basements, which helps facilitate ventilation that naturally helps reduce humidity. The sensor that comes with a basement dehumidifier is designed to shut the unit off when it has reached the recommended level of humidity. This feature can be adjusted if you desire more or less humidity.

A crawl space dehumidifier must be installed outside of the crawl space. A basement dehumidifier does not need to be mounted on an exterior wall because it will run until the desired humidity level has been reached in your home’s conditioned living spaces. You will also need to have your basement dehumidifier installed anywhere from 5-10 feet away from the furnace or hot water heater. Otherwise, condensation will form on the unit’s coils and it may not be effective.

Why is Your Crawl Space So Wet?

Crawl space gets so wet because of the following reasons:

  • Exterior moisture infiltration.
  • Interior vapor transmission.
  • Condensation due to cool crawl space temperatures.
  • Potential water below your concrete slab.

Can a Dehumidifier Kill Mold Effectively?

Yes, Dehumidifier can kill mold in the crawl space effectively, because it can reduce the humidity and de-moisture things. It is an effective way to help prevent mold growth in your crawl space. If you keep the humidity below a specific percentage, mold cannot survive.

you need a dehumidifier with a proper size for your crawl space, depending on how humid/wet the area has already been. You don’t want a unit that is too big or else it will not achieve the desired result. A dehumidifier should be set up in your crawl space and connected with an exhaust hose into your house, usually through a basement window.

Then you need to run the not circulated in crawl spaces, and leaks are hard to fix. Well, dehumidifiers can help you solve such problems effectively.

How to Choose Dehumidifier Size

You need to follow a few things so as to choose the right size for your crawl space dehumidifier. The size of the unit needed will depend upon four things that are:-

  1. The dampness or dryness of the crawl space-

Dampness in Crawl Space: If you find any dampness in your crawl space, then the first thing to do is try to clean up as much moisture as possible by installing a drain. You can also use a dehumidifier with a pump set. But, this is not an exact science and it won’t be able to remove the whole of the moisture in your crawl space.

The dehumidifier cannot remove the moisture from the area where it is not easily accessible.

  1. The size of your crawl space-

If your crawl space is very large, you should choose a more powerful model, which will be able to cool down this giant area and get rid of all humidity in your crawl space.

2. The level of humidity that you want in your crawl space-

If you want to keep the air in a normal range, then don’t buy any dehumidifier. But if you are not happy with the high level of dampness and moisture, then you can go for an installation.

3. How much area has to be cooled down in your crawl space

If the area is large, then you will need a larger unit. If the area is small, then you go for a smaller unit.

Buyers Guidelines

Buyers Guidelines To Buy The Best Crawl Space Dehumidifier

  1. Noise

If you are buying a Dehumidifier for your living space, noise is not an issue, but if it’s for a crawl space or basement, make sure the Dehumidifier you pick has the lowest noise rating possible. The lower the dB(A), the quieter it operates. In this case, a good crawl space Dehumidifier should be around 50dB(A).

2. Humidity Removal

Make sure the Dehumidifier you pick can handle humidity as high as possible without affecting the performance of the device. An acceptable range for a good crawl space Dehumidifier is between 70% to 95%. It’s also recommended to get a Dehumidifier with a desiccant as an alternative to the refrigerant. This is because the refrigerant will become ineffective when humidity reaches around 95% and if that happens, it can affect the performance of your device.

3. Drainage

The length of time before drainage should be taken into account when buying a crawl space Dehumidifier. How often the Dehumidifier empties its tank should be included in your considerations. The recommended time is once every 24 hours of operation when operating at maximum capacity for a day; this is usually very high humidity and temperature conditions that are encountered in tropical regions.

4. Low-Temperature Operation

If you’re buying a good crawl space Dehumidifier, make sure it can operate at low temperatures. An acceptable range for a good crawl space Dehumidifier is between 30-80 degrees Fahrenheit, with the most recommended being above 50 degrees.

5. Auto Reset

Some Dehumidifiers do not automatically go back on when the power goes out or if they lose power. Make sure the Dehumidifier you’re purchasing automatically resets itself when power returns so that it does not have to be manually reset.

6. Sizes

Get a good crawl space Dehumidifier according to your room size. As mentioned earlier, there are many different sizes in regards to Dehumidifiers for crawl spaces. Get one that is well suited for your space.

7. Ease of use

The ease of use should be considered when buying the best Dehumidifier for a crawl space. You won’t want to buy something complicated and hard to operate, right? Get a Dehumidifier that can be operated by anyone regardless if they’re not tech-savvy.

8. Installation

The best dehumidifier for crawl space should be easy to install around the home or place you’re trying to dehumidify. It should come with all the necessary parts and tools for proper and safe operation right out of the box. You don’t want to have to go back a week later because you haven’t installed it right.

9. Build Quality

Check out the build quality of the best crawl space Dehumidifiers you’re considering buying; make sure they have a good reputation for quality and reliability. This way, your investment with last long enough to get your money’s worth back. A good build quality usually will mean a more dependable Dehumidifier for long-term use.

10. Coverage Area

Make sure the crawl space Dehumidifier you’re purchasing has a good coverage area; it needs to be able to dehumidify just your crawl space or basement, not the whole house when used in your home.

11. Tank Capacity

This is a very important feature for a good crawl space Dehumidifier. Most will come with an acceptable capacity of anywhere between 9-40 gallons. Get one that has at least 10 gallons if you know you will have a high humidity problem in your crawl space or basement.

12. Safety features

Make sure the best crawl space Dehumidifier you are considering buying has the necessary safety features. Some important safety features for a good crawl space Dehumidifier include a low voltage cut-off switch and auto shut-off timer short circuit protection, over-temperature protection, and thermal protection.

13. Warranty

Get a warranty on the product you’re purchasing; check out what kind of warranty it comes with and what it covers. This way, you know you’re getting something that comes with at least a reasonable amount of the manufacturer’s guarantee.

14. Humidistat

A good humidistat on your crawl space Dehumidifier will ensure the right level of humidity in your room or basement. Make sure to find one that has the right features and right controls for the humidistat.

15. Defrosting System

A good dehumidifier for a crawl space should have a defrosting system that can be easily accessed at any time in case it needs to be cleaned out or maintained. Make sure this is part of your considerations when choosing which one to buy.

16. Condensate Pumps

The best crawl space Dehumidifiers come with at least a condensate pump or some other form of automatic drainage. These are often called “wet side” pumps.

17. Additional Features

There are several additional features to look out for when seeking the best crawl space Dehumidifier:

Many will have a built-in pump, which is great for getting water out of the crawl space and also comes with a Wireless remote control access

18. Energy Efficiency

If you’re looking to buy the best crawl space Dehumidifier then it should have a significant energy efficiency factor. Energy Star means that the machine meets at least 10 or more times its power consumption. The higher your energy efficiency ratio is, the better- but you’ll also be looking at spending more money on the unit and adding to your electricity bill in the long run.

19. Drainage

A good crawl space Dehumidifier will have some form of a built-in drainage system for easy and efficient draining of the water away from your home’s foundation. You’ll need to make sure that you’ll be able to connect this drainage system to your home’s plumbing somehow later on down the road. This is an important feature to consider.

20. Low-Temperature Operation

A good crawl space Dehumidifier should be able to operate in temperatures below freezing and will defrost as necessary and as needed. Most will work fine at around 0 degrees Fahrenheit. However, if you live in a particularly cold area, make sure it can handle the colder temps.

21. Auto Reset

Make sure to check out the auto-reset feature of a good crawl space Dehumidifier. The best ones will have an auto-reset timer and circuit that can be set for how long it takes to reduce humidity by a certain amount. Check to see what kind of range you are given in terms of setting this time.

Frequently Asked Questions

Question’s About Crawl Space Dehumidifier

How much will a dehumidifier cost?

When you purchase a dehumidifier, there are several factors to consider. Dehumidifiers can be very affordable, and it’s possible to get one that is perfect for your home in the $100-$200 range. Typically they’re not going to exceed $300, and you can find models that start at just $100. This is much less expensive than some other options such as crawl space repair contractors or permanent foundation solutions.

How often do I need to run the dehumidifier?

This will depend on the size of your crawlspace, how humid it feels in there, and what the issues are. You should run the dehumidifier according to whatever makes sense for your home and its particular situation. It’s important to keep an eye on it so that you can tell when it isn’t working properly anymore and need a replacement.

What is the difference between an air purifier and a dehumidifier?

An air purifier is something that will remove dust, pollen, dirt, and other impurities from the air. A dehumidifier removes moisture from the air and it’s used to get rid of water vapor or condensation that may be causing problems in your crawl space. Dehumidifiers also tend to be more powerful and more effective in getting rid of larger particles.

How much water will a dehumidifier remove from my crawlspace?

A typical dehumidifier that is properly sized, set at the right humidity levels, and used in the right location should remove between 10-40 gallons of water per day. If you have a larger crawlspace or one with more issues then you might need to purchase one that is in the 40-80 gallon range, which can easily cost $300-$400.

How do I know if I need a dehumidifier?

The best way to find out for sure is to speak with someone at an HVAC contractor local to you. They will be able to give you advice specific to your situation and help you determine if it’s time to invest in a dehumidifier or not. If you have a crawlspace that is moist, humid, moldy, or has other problems then it might be time to take action and get one now while you still have time to save your foundation.

How do I get rid of water in my crawlspace?

There are several ways that you can reduce the amount of moisture that is getting into your crawl space. If you have a large water source nearby then consider moving it further away from your home. You can also seal up any entryways or cracks that are letting the moisture inside. If you have a small water source nearby that can’t be moved then you might need to put in a sump pump or some other sort of drainage system. Talk to an HVAC contractor for details on what will work best for your situation and get the help that you need in order to prevent further damage from water.

What should I do if the dehumidifier isn’t working as expected?

If you notice that your crawl space is still humid or wet, or that there is an issue with mold then you might want to move forward and get a replacement. Be sure to speak with an HVAC contractor to find out what’s wrong so that you can prevent further setbacks in the future.

How do I keep bugs out of my crawl space?

Be sure to cover any vents or pipes that are bringing in outside air. This can help keep them at bay so that they don’t have an opportunity to get inside your home and disturb you or make a mess. Be sure to have some traps set up near the entryways or vents so that you can catch them and keep them from entering.

Wrapping it Up

We hope that this article has helped you find the best crawl space dehumidifier in your price range. You should now be able to confidently make an informed decision about which one is right for your home or business.
Remember, it’s important to know which features suit your needs before making a purchase and to make sure that you install any new appliance correctly so as not to cause leaks. We have used and tested different products and listed these 9 best crawl space dehumidifiers for you. It will definitely help you choose the right one for you.

GV Team

We are a team of experts in many different industries. We often buy the products from the manufacturers, test and review them on our platform. GV Team consists of 50+ members, who are experts in different industries, such as Automobile, Fitness, Phones, 3D Printers and so on.. Do follow us on social media.

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