Crawl Space Dehumidifier: How To Environmentally Secure Your Home

A crawl space dehumidifier is the perfect way to secure your home’s environment. It’s an amazing moisture reduction solution for those unoccupied, narrow spaces between the ground and the first floor your home. These crawl spaces, (as they are called) are often prone to moisture-related issues, which can lead to mold growth, structural damage, and poor indoor air quality. These spaces are also referred to as crawlways, basement passages or basement channels.

To combat these problems, a crawl space dehumidifier can maintaining optimal humidity levels. In this article, we will explore the importance of these units, how they work, their benefits, and tips for selecting and installing them.

Understanding Humidity and its Impact on Crawl Spaces

1.1 How Does Humidity Work

So, how does humidity work….

Humidity refers to the amount of moisture or water vapor present in the air. House humidity refers to the amount of moisture present in the indoor air. The ideal humidity range for most homes is generally considered to be between 30% and 50%.

In fact, humidity levels in a house are influenced by various factors, including weather conditions, ventilation, and human activities.

For a more in depth look at how does humidity work, click on the link to access our blog post titled “Crawl Space Humidity: What You Need To Know“. It even answers the question of how is humidity measured.

Summer: During the summer months, when the outside air is warmer, high humidity levels can be a challenge. Moreover, excessive moisture in the air can promote the growth of mold and mildew, which can negatively impact indoor air quality and lead to respiratory issues.

Winter: During the winter months, when the outside air is colder, the humidity indoors tends to drop because colder air has a lower capacity to hold moisture. This can lead to dry air and potential discomfort, like dry skin, and irritated respiratory passages.

1.2 The Relationship Between Humidity and Crawl Spaces

1.2.1 Location

Crawl spaces are often found beneath homes and buildings. It’s the shallow area beneath a building that is typically too low to stand up in and is often used for storage or housing essential home infrastructure such as plumbing, electrical, and HVAC systems.

Their location makes them vulnerable to high humidity levels. These areas are typically dark, cool, and have limited air circulation, creating an environment conducive to moisture buildup. Without proper ventilation, humidity can become a persistent issue in crawl spaces.

1.2.2 Condensation

When warm, moist air from the surrounding environment enters the crawl space, it encounters cooler surfaces such as walls, floors, and pipes. As a result, the air cools down and reaches its dew point, causing water vapor to condense on these surfaces. Over time, this condensation can lead to the accumulation of excess moisture in the crawl space.

1.2.3 Moisture Build Up

The lack of ventilation exacerbates the problem by preventing the escape of moisture-laden air. Then as the moisture continues to build up, the humidity levels in the crawl space rise, creating an ideal breeding ground for various problems associated with excess humidity.

1.3 The Dangers of Excess Humidity in Crawl Spaces

1.3.1 Growth of Fungi

Excess humidity in crawl spaces can have numerous negative effects, ranging from health risks to structural damage. Without a doubt, one of the primary concerns is the growth of mold and mildew. Obviously, these fungi thrive in moist environments and can quickly spread throughout the crawl space, releasing spores into the air. Inhaling these spores can lead to respiratory problems, allergies, and even serious health issues for individuals living in the home.

1.3.2 Structure Stability

Furthermore, high humidity levels contribute to wood rot and structural damage. Moisture can seep into wooden components causing them to weaken and deteriorate over time. Moreover, this can compromise the stability of the entire structure, posing a significant risk to the safety of the building and its occupants.

1.3.3 Pet Infestation

Pests are also attracted to crawl spaces with excess humidity. Insects like termites, cockroaches, and ants thrive in damp environments and can infest the space, causing further damage to the structure. Additionally, rodents are attracted to the availability of water in humid crawl spaces, leading to potential infestations and the accompanying issues they bring.

1.3.4 Unhealthy Environment

In addition to these specific dangers, excessive humidity in crawl spaces can also impact the overall indoor air quality of the home. The moist air from the crawl space can migrate upwards through floorboards and gaps, introducing musty odors and allergens into the living areas. This can create an uncomfortable and unhealthy environment for the occupants.

Introducing the Crawl Space Dehumidifier

2.1 What is a Crawl Space Dehumidifier

2.1.1 Purpose and Function

A crawl space dehumidifier is a specialized device designed to regulate and control humidity levels in crawl spaces. As stated before, crawl spaces are prone to high levels of moisture, leading to issues like mold growth, wood rot, and pest infestation. A crawl space dehumidifier works by extracting excess moisture from the air, reducing humidity levels, and preventing the buildup of dampness in the crawl space.

2.1.2 Durability, Features and Protection

Crawl space dehumidifiers are specifically designed to operate effectively in the challenging conditions of crawl spaces. They are typically compact, durable, and capable of operating in low temperatures. These dehumidifiers often come with features like automatic drainage systems to remove collected water, humidity sensors to adjust operation based on current moisture levels, and air filters to improve air quality. So then, by maintaining optimal humidity levels, crawl space dehumidifiers help protect the structural integrity of the home, prevent the growth of mold and mildew, and improve indoor air quality. They are an essential component of moisture control strategies in crawl spaces and contribute to creating a healthy and comfortable living environment.

2.2 How Does a Crawl Space Dehumidifier Work

There are basically 3 different types of technologies commonly used in crawl space dehumidifiers. This is how they work…

2.2.1 Refrigerant Based Cralw Space Dehumidifiers

Refrigerant based dehumidifiers function by employing a refrigeration cycle to extract moisture from the air. The dehumidifier pulls in the surrounding air, allowing it to flow over chilled coils. As the air cools down, the moisture within it undergoes condensation, transforming into small droplets of water. These droplets are subsequently gathered and drained away. The dehumidifier then warms up the dry air before releasing it back into the crawl space. Due to their versatility across various temperatures, refrigerant-based dehumidifiers are frequently utilized in crawl spaces.

2.2.2 Desiccant Cralw Space Dehumidifiers

Desiccant dehumidifiers make use of a desiccant substance, like silica gel or zeolite, to soak up moisture present in the air. When the air is drawn into the dehumidifier, it flows through the desiccant material that possesses the ability to attract and retain the moisture. The resultant dry air is subsequently reintroduced into the crawl space. Desiccant dehumidifiers are particularly well-suited for colder climates due to their efficient operation even at lower temperatures.

2.2.3 Ventilation Based Cralw Space Dehumidifiers

Instead of relying solely on mechanical extraction, ventilation based dehumidifiers work by introducing fresh, dry air from outside into the crawl space. This helps to dilute and replace the humid air, effectively reducing the overall humidity levels. Ventilation-based dehumidifiers are often used in conjunction with other moisture control methods, such as sealing air leaks and implementing proper insulation.

It’s important to note that the choice of technology depends on various factors, including the specific needs of the crawl space, the climate, and the extent of moisture-related issues. Consulting with a professional or an expert can help determine the most suitable crawlspace dehumidifier for your specific situation.

Benefits of Using a Crawl Space Dehumidifier

3.1 Prevention of Mold and Mildew Growth

Crawl space dehumidifiers are known for their exceptional ability to prevent the growth of mold and mildew. They greatly enhance the air quality in your home. They also minimizing the chances of potential health issues. OK, so let’s see how they accomplish this.

3.1.1 Humidity Regulation

Crawl space dehumidifiers play a crucial role in regulating humidity levels within the crawl space. High humidity is a primary factor that promotes mold and mildew growth. These organisms thrive in damp environments where moisture levels exceed their tolerance. So by extracting excess moisture from the air, dehumidifiers lower humidity to a range (typically 40-50%) where mold and mildew find it challenging to flourish. This control over humidity creates an inhospitable environment for mold growth, effectively preventing its colonization.

3.1.2 Moisture Elimination

One of the key functions of crawl space dehumidifiers is to eliminate moisture from the crawl space. Moisture can enter the crawl space through various sources such as groundwater seepage, plumbing leaks, or condensation. By removing this excess moisture, dehumidifiers address the underlying cause of mold and mildew growth. They actively pull in humid air, cool it to condense the moisture, and then release the dry air back into the crawl space. This moisture elimination process reduces the available water source for mold and mildew, hindering their ability to survive and proliferate.

3.1.3 Condensation Prevention

Crawl spaces are prone to condensation due to temperature differentials and inadequate ventilation. When warm, humid air comes into contact with cooler surfaces in the crawl space, condensation occurs. This moisture accumulation provides an ideal breeding ground for mold and mildew. Crawl space dehumidifiers prevent condensation by reducing humidity levels and maintaining a balanced moisture-air equilibrium. By minimizing condensation, dehumidifiers remove the conditions necessary for mold and mildew to thrive, effectively curbing their growth.

3.1.4 Air Circulation and Ventilation

Proper air circulation and ventilation are essential for preventing mold and mildew growth in crawl spaces. Stagnant air encourages moisture buildup and creates an environment conducive to mold proliferation. Crawl space dehumidifiers often incorporate fans or blowers that circulate the air, preventing it from becoming stagnant. Additionally, some dehumidifiers can be integrated with existing ventilation systems to enhance airflow. By promoting air movement and ventilation, dehumidifiers reduce moisture buildup and inhibit the growth of mold and mildew.

3.2 Protection Against Structural Damage

3.2.1 Wood Rot and Decay

A crawl space dehumidifier also help prevent structural damage to your home. Excessive moisture in crawl spaces can seep into the wooden supports, beams, and flooring of your home, leading to wood rot and structural deterioration over time. This can weaken the overall integrity of the house and compromise its stability. By effectively controlling humidity levels, a dehumidifier in crawl space humidity minimize the presence of moisture in these vulnerable areas, reducing the risk of wood decay and structural damage.

3.2.2 Metal Corrosion

Excess moisture in crawl spaces can also cause metal components, such as pipes, ductwork, and electrical wiring, to corrode and rust. This can lead to malfunctioning systems, water leaks, and potential safety hazards. Crawl space dehumidifiers help maintain a dry environment, preventing the buildup of moisture that can contribute to corrosion and extending the lifespan of these important home infrastructure components.

3.2.3 Costly Repairs

By installing a crawl space dehumidifier, homeowners can safeguard the structural integrity of their homes, prolong the lifespan of building materials, and save on potential costly repairs. The prevention of structural damage through humidity control is an important benefit that contributes to the overall well-being and longevity of your home.

3.3 Improvement in Indoor Air Quality

As stated before, crawl space dehumidifiers play a significant role in improving indoor air quality by addressing the issue of excess humidity. Here are three key ways in which they contribute to creating a healthier living environment:

3.3.1 Reduction of Musty Odors

Excessive moisture in crawl spaces can lead to the growth of mold, mildew, and fungi, which emit a musty odor. These odors can permeate into the living areas above, affecting the overall air quality of your home. So by effectively controlling humidity levels, crawl space dehumidifiers prevent the conditions that promote mold and mildew growth, thereby reducing the presence of musty odors. This helps create a more pleasant and fresh-smelling indoor environment.

3.3.2 Decreased Presence of Airborne Allergens

Mold spores, dust mites, and other allergens thrive in environments with high humidity. When the air in crawl spaces becomes humid, these allergens can easily become airborne and circulate throughout your home, leading to respiratory issues and allergic reactions. Crawl space dehumidifiers help maintain optimal humidity levels, inhibiting the growth and spread of these allergens. Therefore, by reducing the presence of airborne allergens, dehumidifiers contribute to improved indoor air quality and provide relief to individuals with allergies or asthma.

3.3.3 Prevention of Health Issues

Excessive humidity levels within crawl spaces can foster the growth of bacteria and viruses, heightening the likelihood of respiratory infections and various health complications. Moreover, elevated humidity can give rise to a damp and unhealthy atmosphere, aggravating respiratory conditions like asthma. Through efficient humidity control, crawl space dehumidifiers create an unfavorable environment for harmful microorganisms, diminishing the risks associated with poor indoor air quality and promoting healthier living conditions.

3.4 Energy Efficiency and Cost Savings

Crawlspace dehumidifiers play a crucial role in enhancing energy efficiency and generating cost savings by effectively reducing excess moisture. So with that,, here are several ways in which crawl space dehumidifiers contribute to energy efficiency and lower utility bills:

3.4.1 Enhanced HVAC Efficiency

Excessive moisture in crawl spaces can cause the air conditioning or heating system to work harder to maintain desired indoor temperatures. By controlling humidity levels, crawl space dehumidifiers alleviate the burden on the HVAC system, allowing it to operate more efficiently. When the air is drier, the HVAC system can cool or heat the air more effectively, resulting in reduced energy consumption and increased energy efficiency. This, in turn, translates to lower utility bills.

3.4.2 Reduced Cycling Frequency

When humidity levels are high, the HVAC system may need to cycle on and off more frequently to maintain the desired indoor conditions. This frequent cycling not only consumes more energy but also puts additional strain on the system. Crawl space dehumidifiers help maintain optimal humidity levels, reducing the need for the HVAC system to cycle as frequently. As a result, the system runs for longer continuous periods, reaching its peak efficiency and minimizing energy waste.

3.4.3 Prevented Overcooling or Overheating

In humid conditions, high moisture content in the air can make the indoor environment feel warmer than it actually is. As a result, homeowners may be tempted to lower the thermostat setting, leading to unnecessary overcooling and increased energy consumption. By effectively controlling humidity, crawl space dehumidifiers create a more comfortable indoor environment, allowing homeowners to set their thermostats at higher temperatures without sacrificing comfort. This prevents excessive cooling and reduces energy usage.

3.4.4 Long-term Cost Savings

By investing in a crawl space dehumidifier, homeowners can experience long-term cost savings. In truth, the reduced energy consumption achieved through efficient humidity control can lead to lower utility bills over time. Additionally, the extended lifespan of the HVAC system, resulting from reduced strain and optimized operation, reduces the need for costly repairs or premature replacements.

Selecting the Best Crawl Space Dehumidifier for Your Needs

When selecting a crawl space dehumidifier, there are several factors to consider to ensure you choose the best crawl space dehumidifier for your needs. Go ahead and use this guide to help you make an informed decision:

4.1 Assess Your Crawl Space

Determine the size of your crawl space and identify any specific conditions or issues you need to address, such as high humidity levels, water leakage, or mold growth. This assessment will help you understand the requirements for your dehumidifier.

4.2 Calculate the Dehumidification Capacity

Measure the square footage of your crawl space. For an accurate estimation of the dehumidification capacity required, consider factors like the relative humidity level, temperature, and any additional moisture sources. On the whole, most dehumidifiers provide their capacity in pints per day (PPD), indicating how much moisture they can remove in a 24-hour period.

4.3 Choose the Appropriate Type of Duhumidifier

There are two main types of crawl space dehumidifiers: portable and whole-house (installed). Portable units are suitable for smaller crawl spaces, while whole-house dehumidifiers are ideal for larger areas or when you want to integrate it with your HVAC system. Consider the size and accessibility of your crawl space when deciding between the two.

4.4 Consider the Drainage Options

Dehumidifiers remove moisture, and you need to ensure proper drainage for the collected water. Some dehumidifiers have built-in condensate pumps that can push the water vertically to a nearby drain, while others rely on gravity drainage with a nearby floor drain or sump pump. Assess the availability and feasibility of drainage options in your crawl space.

4.5 Look for Energy Efficiency

Energy-efficient dehumidifiers can help you save on electricity bills while effectively removing moisture. Look for dehumidifiers with an Energy Star certification, which indicates they meet or exceed energy efficiency guidelines.

4.6 Check Additional Features

Consider any additional features that may enhance the usability and effectiveness of the dehumidifier. These can include auto-restart after a power outage, adjustable humidity settings, digital controls, programmable timers, or air filtration capabilities. And then evaluate these features based on your specific needs and preferences.

4.7 Read Customer Reviews

Look for customer reviews and ratings for the dehumidifiers you are considering. Pay attention to feedback regarding performance, durability, noise levels, and customer support. In truth, this information can provide valuable insights into the real-world experiences of other users.

4.8 Set Your Budget

Determine your budget range for the dehumidifier purchase, considering both the upfront cost and any potential long-term energy savings. Compare prices and features across different brands and models to find the best value for your money.

4.9 Seek Professional Advice if Necessary

If you’re uncertain about the specific requirements or facing unique challenges in your crawl space, it’s advisable to consult with professionals, such as crawl space contractors or HVAC specialists. They can provide expert guidance and recommend the most suitable dehumidifier for your needs.

By following these steps and considering your specific crawl space conditions, you’ll be better equipped to select the best dehumidifier that addresses your moisture concerns effectively.

Steps to Install Your Crawl Space Dehumidifier

Here are the general steps you need to follow to install you crawlspace dehumidifier:

5.1 Gather the Necessary Tools

Before you begin the installation, make sure you gather the required tools such as a drill, screws, screwdriver, measuring tape, level, and a utility knife.

5.2 Determine the Ideal Location

Identify the best spot to install the dehumidifier. Usually, it should be placed in a central location in the crawl space for optimal coverage. Of course, look for an area with a power source nearby.

5.3 Prepare the Space

Clear any debris, obstacles, or obstructions from the area where you plan to install the dehumidifier. Then ensure that the floor and walls are dry and free from moisture.

5.4 Install the Dehumidifier Mounting Brackets

Most crawl space dehumidifiers come with mounting brackets. Use a measuring tape and level to mark and install the brackets on the wall or ceiling according to the manufacturer’s instructions.

5.5 Mount the Unit

Carefully lift the dehumidifier and secure it onto the mounting brackets. Make sure it is level and stable. Follow the manufacturer’s instructions for proper installation and attachment.

5.6 Connect the Drainage System

Dehumidifiers remove moisture from the air, so it is essential to have a drainage system in place. Some dehumidifiers come with built-in condensate pumps, while others require external drainage. Connect the appropriate drainage system according to the manufacturer’s instructions. This could involve installing a drainage hose, condensate pump, or connecting to an existing drain or sump pump. To learn more, click this link to access our blog post title “Dehumidifier Drain Hose 101: Everything You Need to Know“.

5.7 Set the Humidity Levels

Adjust the humidity settings on the dehumidifier based on the recommended levels for your crawl space. Moreover, most units today allow you to set the desired humidity level and will automatically turn on and off to maintain it.

5.8 Test and Monitor

Once the installation is complete, test the dehumidifier to ensure it is functioning correctly. Monitor the crawl space regularly to ensure the humidity levels are within the desired range.

Lastly, remember to refer to the specific instructions provided by the manufacturer of your dehumidifier for detailed installation steps and any additional considerations. If you’re unsure about any step of the process, it’s recommended to consult with a professional for assistance.

Alternative Solutions for Crawl Space Moisture Control

6.1 Crawl Space Encapsulation

Crawl space encapsulation is the process of fully covering the crawl space using a sturdy vapor barrier. This barrier serves as protection against moisture intrusion. It minimizing the chances of mold growth, mildew formation, and any potential harm to the structure. Moreover, encapsulation contributes to enhanced indoor air quality and energy efficiency by creating a sealed and conditioned area.

6.2 Crawl Space Ventilation Fan

Installing a crawl space ventilation fan can be an effective way to enhance air circulation and mitigate moisture buildup in a crawl space. These fans are designed to draw in fresh air from the outside and expel stale, damp air from the crawl space, thereby improving the overall air quality. This movement helps in reducing the levels of humidity.

6.3 Humidity Monitoring and Control

Considering the integration of humidity monitoring devices or smart thermostats. These innovative tools provide you with the ability to accurately track and control the humidity levels within your crawl space. Leverage their capabilities to gain valuable insights into the moisture content of the area and ensure that it remains within the desired range.

Tips for Maintaining a Crawl Space Environment

7.1 Regular Inspections and Cleaning

Perform routine inspections of your crawl space to identify any signs of moisture intrusion, leaks, or mold growth. Keep the space clean and free from debris that can trap moisture.

7.2 Monitoring Humidity Levels

Use a hygrometer to monitor the humidity levels in your crawl space regularly. Adjust the dehumidifier settings if needed to maintain optimal humidity levels.

7.3 Addressing Water Intrusion Issues

If you notice water intrusion or excessive moisture, address the underlying causes promptly. This may involve fixing leaks, improving drainage, or implementing appropriate waterproofing measures.

Conclusion

Well, as you’ve seen, it’s important to maintaining a dry and healthy crawl space your home. By investing in a crawl space dehumidifier you can prevent mold growth, protect your property, and ensure optimal indoor air quality. Remember to select a dehumidifier that suits your specific needs, follow proper installation procedures, and conduct regular maintenance. With a dry and well-maintained crawl space, you can enjoy a comfortable and healthy living environment for years to come.