What size dehumidifier for crawl space?

Believe it or not, these crawl space areas can make or break the integrity of your house. They tend to be forgotten about and that's how we get problems associated with accumulating excess moisture, leading to unwanted mold growth, musty odors, and even structural house damage. A practical way to handle excess moisture levels is by looking for an ideal crawl space dehumidifier. So, "What size dehumidifier for crawl space do I need?" is likely to be a question that has crossed your mind. Lucky for you, we’ll provide you with enough information to help you find out what size dehumidifier for crawl space you need, along with its benefits. So stay tuned!


What is a dehumidifier?

A dehumidifier is a household appliance that primarily serves to reduce and level the moisture content in the air. Its basic function is to remove excess moisture from the surrounding environment, making your living space healthier and comfortable.

It does so by pulling in moist air, passing it through the cooling coils where the moisture is condensed into water droplets collected either in a removable container or drained directly into a plumbing system. The dried air is then reheated before returning to the crawl space, thereby contributing to a lively and comfortable indoor atmosphere. This isn't just for comfort, but also for your health too.


Benefits for dehumidifier in the crawl space

From preserving your house's structural integrity to maintaining moisture levels, these crawl space dehumidifiers can achieve a healthier and more comfortable living environment. A crawl space dehumidifier not only removes and treats excess moisture in your house but also helps eliminate all possible harms associated with the high moisture level in your house.

Preventing the Growth of Mold and Mildew:

Humid places like basements, bathrooms, and crawlspaces are known for their high humidity levels which is an easy invitation for mold and mildew to come in. Being able to prevent these bugs from making a comfy spot in your home can make your environment cleaner, healthier, and more comfortable.

Eliminating Smells That Make You Cringe:

If you’ve ever walked into a room and been greeted with a smell that makes you want to walk back out, then you know what I’m talking about. Musty odors not only create an unpleasant smell but also a breeding ground for mold and mildew. Also giving them plenty of food to grow so they won’t leave anytime soon. Crawl space dehumidifiers tackle this problem by eliminating the smell that makes your nose curl.

Better Air Quality Indoors:

Allergens are harmful to our lungs and dust mites thrive when there’s too much humidity in the air. Crawl space dehumidifiers can act as air purifiers by regulating the temperature and taking away that sticky feeling. Allowing for just the fresh air, free of impurities that we need for our daily lives.

Keeping Your House Structurally Sound:

Excess dampness can weaken the foundation of your house leading it down a path of extensive damage. The last thing anyone wants is their home falling apart while they’re inside it, crawl space dehumidifiers work at solving this issue by drying out any wet spots or surfaces they find before any permanent damage takes place.


How to determine what size dehumidifier for your crawl space?

Choosing what size dehumidifier for the crawl space is best for you can be a challenging task. If the dehumidifier is smaller than required, it won’t be efficiently monitoring moisture and if it’s an oversized unit, it would end up wasting too much energy. If you too find it troublesome to determine what size dehumidifier for crawl space is right for you, the following guidelines will assist you:

Understand the dimensions and capacity of crawl space dehumidifier

Investing in an appropriate crawl space dehumidifier guarantees efficient moisture control, preventing the risk of structural property damage. However, dehumidifier size alone is not sufficient, and you have to consider other important factors like the intensity of moisture levels, the dehumidifier’s swift performance, its extraction rate, and much more are equally vital for its optimal functionality.

Calculate the Square Footage

Calculating the square footage of the crawl space in your house is a fundamental step to ensure your dehumidifier works best. Measure the length and width of the area with tape or ruler and multiply these values to get the square footage of the crawl space. With this value, you can make an informed decision when choosing what size dehumidifier for crawl space is ideal.

Consider the intensity of moisture issues in crawl spaces

Aside from the square footage of the crawl space, you also need to take into account the severity of moisture levels in the area. If your crawl space is prone to very high levels of dampness, look for crawl space dehumidifiers with a high extraction rate. This indicates the dehumidifier’s ability to remove moisture quickly and efficiently back to normal.

Energy-efficient dehumidifier models with additional features

When choosing a dehumidifier for your crawl space, it's important to examine its energy efficiency ratings. Opt for models with high-efficiency rates to minimize power use and save money in the future. These models usually have ENERGY STAR certification marked on them, assuring their contribution to environmental sustainability.


Crawl spaces, often underestimated, can become breeding grounds for molds, musty odors, and mildew that end up rotting your property. However, you can put an end to this destructive cycle by choosing the right size crawl space dehumidifier, and ensuring that your home is a safe, comfortable place for your family to live. This article provides in-depth guidance on how to choose the perfect crawl space dehumidifier size, empowering you to combat any negative effects that may arise. Say goodbye to unpleasant odors and welcome to a happier, healthier home.