How to Install Crawl Space Dehumidifier: A Step-by-Step Guide

Having a crawl space in your home can provide numerous benefits, such as extra storage space or easy access to utilities. However, crawl spaces are notorious for their high humidity levels, which can lead to mold growth, musty odors, and even structural damage over time.

To combat this issue and create a healthier living environment, installing a crawl space dehumidifier is an effective solution. In this article, we will guide you through the process of installing a crawl space dehumidifier, covering important aspects such as the cost of equipment and installation, how to select the right size for your specific needs, and other essential considerations before embarking on this project.

Let’s get into it!

Should I put a Dehumidifier in My Crawl Space?

Should I put a dehumidifier in my crawl space? This is a question many homeowners with crawl spaces may ask themselves.

The answer is, yes, installing a dehumidifier in your crawl space can greatly benefit your home and improve the overall living environment.

How Does a Crawl Space Dehumidifier Work?

Dehumidifiers do their job by cooling the air with fans and refrigeration coils, which leads to condensation and the removal of moisture. The water that is collected can either be drained or pumped out of the crawl space.

To give you a more detailed explanation, a crawl space dehumidifier operates in the following way:

  • It pulls in humid air from the crawl space, which then passes over cold coils.
  • This causes the moisture to condense into water droplets that are collected in a drain pan or bucket.
  • The dehumidifier continuously works to keep humidity levels in check, ensuring optimal moisture levels.
  • Some dehumidifiers even come with a built-in pump that automatically drains the water outside, while others require manual emptying.

You can greatly improve your crawl space and protect your home from moisture-related issues by installing a crawl space dehumidifier. To get the best results, you need to select the appropriate size and model of dehumidifier for your crawl space.

Will a Dehumidifier Dry Out Crawl Space?

Yes, absolutely it will. A dehumidifier works by drawing in humid air, passing it over coils that cool the air, condensing the moisture into water, and then draining the water out of the dehumidifier. The dry air is then released back into the crawl space.

Is a Crawl Space Dehumidifier Necessary?

Crawl spaces are well-known for having really humid conditions. This happens because they're underground and don't have enough ventilation. Having too much moisture in the crawl space can cause all sorts of problems like mold, rotting wood, pests, and bad smells.

Thankfully, using a dehumidifier can help lower the humidity and stop these issues from happening. If you see water on your windows, notice a musty odor, or spot any signs of mold or mildew in your crawl space, it's a clear sign that you need to get a dehumidifier.

How to Install a Crawl Space Dehumidifier

If you want to keep your crawl space healthy and free from moisture, it's crucial to install a crawl space dehumidifier.

We've got you covered with a step-by-step guide on how to do it!

  1. 1
    Choose the right dehumidifier: Before you begin installing, make sure you pick the perfect crawl space dehumidifier. Take into account your crawl space size, humidity level, and the dehumidifier's capacity. And don't forget to check if it has a built-in condensate pump for hassle-free drainage.
  2. 2
    Prepare the crawl space: Clear out any debris, insulation, and moisture sources from the crawl space before installing the dehumidifier. Don't forget to fix any leaks or cracks in the walls or foundation.
  3. 3
    Find the ideal location: Locate the best spot for the dehumidifier in the crawl space. It should be placed in an area where it can effectively draw in air and remove moisture. Be mindful not to position it too near walls or any objects that could hinder proper airflow.
  4. 4
    Install the dehumidifier: Just follow the manufacturer's instructions to install the dehumidifier. You might need to use mounting brackets or secure it to the crawl space floor or wall. Make sure it's firmly in place to prevent any accidents or damage.
  5. 5
    Connect the drainage system: To get your crawl space dehumidifier working effectively, you'll want to make sure the drainage system is properly set up. Luckily, most dehumidifiers come with a handy drainage hose or pump. Simply connect this hose or pump to your dehumidifier and point it towards a suitable drainage outlet. Just remember to ensure that the drainage system has a slight downward slope so that water flows smoothly.
  6. 6
    Get it running: Plug in the dehumidifier and switch it on. Set the moisture level to match what's best for your crawl space. Keep an eye on the dehumidifier to make sure it's working well.
  7. 7
    Taking care of it: Keep the dehumidifier in top shape by cleaning and maintaining it regularly. This could mean cleaning or swapping out the air filter, emptying the collection bucket or drainage system, and checking for any issues or problems.

Just remember, when it comes to installing a crawl space dehumidifier, the process can differ depending on the model and requirements. It's crucial to follow the manufacturer's instructions and take necessary precautions for a safe and effective installation.

And hey, don't forget to immerse yourself in humidity knowledge for a better understanding! If you feel unsure about any step, it's always a good idea to seek professional help to ensure your crawl space dehumidifier is installed properly.

How Much Does a Crawl Space Dehumidifier Cost?

When it comes to crawl space dehumidifiers, the cost can vary depending on the size and features of the unit. Some crawl space dehumidifiers may cost as low as $100, while others with advanced features and larger capacities can range up to $1000 or more.

The size of the crawl space also plays a significant role in determining the cost. Smaller crawl spaces may require smaller units, which are generally less expensive than those designed for larger areas.

Additionally, certain features such as automatic humidity sensors, remote control operation, and built-in condensate pumps can contribute to higher prices. To give you an idea of the cost, here are some price ranges for crawl space dehumidifiers:

  • Small Crawl Space Dehumidifier – A small crawl space dehumidifier is suitable for areas up to 1,000 square feet. These compact units are designed to fit in tight spaces and are typically more affordable. The cost of a small crawl space dehumidifier can range from $200 to $500.
  • Commercial Crawl Space Dehumidifier – If you have a bigger crawl space or own a commercial property, you'll need a commercial dehumidifier. These units are designed to handle heavy usage and have a greater capacity for removing moisture. The price of a commercial crawl space dehumidifier varies depending on its size and capacity, ranging from $500 to $2,000 or even higher.
  • Cheap Crawl Space Dehumidifier – If you're on a budget, you can find budget-friendly dehumidifiers for around $150 to $300. While these units may not have all the advanced features, they can still effectively reduce humidity levels in small to medium-sized crawl spaces.
  • DIY Crawl Space Dehumidifier – Some homeowners prefer to build their own crawl space dehumidifier using DIY methods. This can be a cost-effective option, but it may require more time and effort. The cost of a DIY dehumidifier for crawl space will depend on the materials and components used.

Keep in mind that these numbers are just estimates - actual costs could be different depending on the features and capabilities of the unit. It's important to consider both the upfront cost and long-term savings when purchasing a crawl space dehumidifier.

Investing in a high-quality unit may require a larger initial investment but can save you money in the long run by preventing moisture-related issues and improving energy efficiency.

Moreover, the cost of a crawl space dehumidifier should not be the sole factor in your decision-making process. Consider factors such as the size of your crawl space, the extent of the moisture problem, and the features you need to effectively address the issue.

Last but not least, it's always recommended to consult with a professional to assess your specific needs and determine the best dehumidifier for your crawl space.

What Size Dehumidifier for Crawl Space Do I Need?

Determining the right dehumidifier size for your crawl space depends on several factors, including the size of your crawl space, the level of humidity, and the climate in your area.

To help you figure out the appropriate capacity, here are some general guidelines:

  • Measure the square footage of your crawl space: To get an accurate estimate, measure the length and width of your crawl space and multiply the two numbers to get the total square footage.
  • Consider the degree of moisture: If your crawl space has significant moisture issues, such as standing water or visible mold growth, you may need a larger dehumidifier with a higher capacity.
  • Take into account the climate: If you live in a humid climate or an area with high annual precipitation, you may need a dehumidifier with a higher capacity to effectively remove moisture from your crawl space.
[table id=8 /]

Please keep in mind that these guidelines are general and may vary depending on the specific conditions of your crawl space. Factors such as the climate, level of moisture, and ventilation in your crawl space can all impact the required dehumidifier capacity.

Additionally, if you have any water leakage or plumbing issues in your crawl space, these should be addressed before installing a dehumidifier to ensure its effectiveness.

In some cases, it may also be necessary to consider additional measures such as sealing air leaks or insulating the crawl space walls to further control moisture levels.

Remember, the wrong size can lead to poor performance and waste energy. So, make sure to select the right size for an efficient dehumidifier and a healthy living environment.

What Should Crawl Space Dehumidifier be set at

Setting the correct humidity level on your crawl space dehumidifier is crucial for effective moisture control. The ideal humidity level to maintain in a crawl space is between 30% to 50%.

Here are some useful tips you can leverage to reducing humidity in crawl space effectively:

  • Start with a higher setting: If the crawl space has excessive moisture, you can initially set the dehumidifier to a higher humidity level, around 50%, until the moisture is under control.
  • Adjust as needed: Once the humidity level in the crawl space is within the desired range, you can gradually reduce the setting to maintain a consistent humidity level.
  • Monitor regularly: It's important to regularly check the humidity level in the crawl space and adjust the dehumidifier setting accordingly, especially during seasons with higher humidity.

Although crawl space dehumidifiers are generally dependable, there might be occasional problems that can be easily fixed.

If you experience any issues with the dehumidifier, such as it not turning on or not effectively reducing humidity, there are a few troubleshooting steps you can take:

  • Dehumidifier not turning on: Check if the power cord is securely plugged into an outlet and ensure the circuit breaker is not tripped.
  • Insufficient moisture removal: If the dehumidifier is not effectively reducing the moisture in the crawl space, check if the air filter is clean and not clogged. Clean or replace the filter if necessary. Additionally, ensure that the dehumidifier is properly sized for the space and that the settings are adjusted according to the recommended guidelines.
  • Excessive noise or vibration: If the dehumidifier is making unusual noises or vibrations, check for any loose parts or obstructions. Remove any debris or objects blocking the air intake or exhaust vents.
  • Freezing coils: If the dehumidifier's coils freeze, it may be due to a low ambient temperature or a refrigerant leak. Ensure that the crawl space is adequately insulated and that there are no refrigerant leaks.

If you encounter persistent issues with your crawl space dehumidifier, it is best to consult the manufacturer or a professional technician for further assistance.

Remember, regular maintenance and prompt troubleshooting can help to keep your crawl space dehumidifier functioning optimally, ensuring a healthy and moisture-free environment.

Final Verdict

Crawl space dehumidifiers play a crucial role in maintaining a healthy home environment by controlling moisture levels, preventing mold and mildew growth, and improving indoor air quality.

When choosing a crawl space dehumidifier, consider the size of your crawl space, the humidity level, and any additional features you may need. It's essential to consult with a professional to determine the right size and type of dehumidifier for your specific needs.

Keeping your crawl space dry and moisture-free is essential for maintaining a healthy home environment. With the help of a reliable crawl space dehumidifier, you can enjoy peace of mind knowing that your home is protected from moisture-related issues and that your indoor air quality is optimal.

0/5 (0 Reviews)

My name is Justin Williams. I am the founder and blogger at (read more about us). I was an allergy sufferer and that is also the reason why I began my trek to finding the best dehumidifier for my own personal health issues. All of the dehumidifier top picks on the site were put through their paces by Lance Perez - our dehumidifier researcher. He put each one through a series of tests to see how well they performed. Then, our editorial team compiled the insights into articles and published them.

Leave a Comment