Crawl Space Dehumidifier Installation
Keeping the air in your home dry, clean, and healthy starts below ground. At Perma-Seal, we install crawl space dehumidifier systems for homes and businesses throughout the Chicago area.
Why Crawl Space Humidity Control Matters
Controlling humidity in your crawl space is essential for maintaining a healthy, energy-efficient home. Even after moisture intrusion is addressed, excess humidity can linger below your home and continue to cause problems. The final step in protecting your property is installing a high-capacity crawl-space dehumidifier designed for below-grade and encapsulated environments.
A significant portion of the air inside your home originates from the crawl space. When that air is damp or contaminated, it rises into the living areas above, affecting comfort, air quality, and even structural integrity. Proper crawl space humidity control helps protect your home from:
Mold and mildew growth
- Musty odors throughout the home
- Wood rot and structural damage
- Pest attraction due to damp conditions
- Increased allergens and poor indoor air quality
Moisture trapped beneath your home creates the perfect environment for microbial growth, especially when combined with insulation, wood framing, and stored materials. The Environmental Protection Agency (EPA) consistently identifies indoor air pollution as one of the top environmental health concerns, and excess humidity is a major contributor.
Installing a professional crawl space dehumidification system significantly reduces moisture levels, protects your home’s structure, and supports healthier indoor air.
Healthy Air Starts Below Your Home
Indoor air can be far more polluted than outdoor air, especially when crawl space moisture is left unchecked. High humidity allows mold spores, dust mites, and other allergens to thrive.
As part of our crawl space encapsulation and moisture control solutions, Perma-Seal recommends installing a dedicated crawl space humidity control system. Maintaining humidity levels between 30–60% helps:
Prevent mold growth
Improve indoor air quality
Protect wood framing and subflooring
Increase overall comfort throughout the home
When humidity is properly controlled, you’ll notice fewer odors, more consistent indoor temperatures, and a healthier environment year-round.
Perma-Seal installs Perma-Dry Air Purification and Dehumidification systems designed specifically for crawl spaces in the Chicago area, providing long-term protection and reliable performance.
PermaDry vs. Big Box Store Dehumidifiers
PermaDry (Professional-Grade):
- Designed for small rooms, not entire basements
- Limited capacity (often 40–50 pints/day)
- Struggle to maintain humidity below 60%
- Require frequent manual emptying
- Shorter lifespan and limited warranties
- Often fail prematurely in damp basement environments
Typical Big Box Store Dehumidifiers:
- Designed for whole-basement and crawl space humidity control
- High-capacity moisture removal (up to 100 pints/day)
- Continuous drain—no manual emptying
- Built for long runtimes and long service life
- Integrated humidity controls for stable indoor conditions
- Installed as part of a long-term moisture management solution
How Do I Know If My Home Has Crawl Space Air Problems?
It’s important to know what kind of crawl space problem you’re having in order to know the best way to fix it. Several signs can indicate crawl space air is a problem, including:
- Unpleasant odors
- High humidity levels
- Standing water or dampness
- Insects or rodents
If you notice any of these signs, addressing the issue as soon as possible is important. A professional from Perma-Seal can assess the crawl space air quality and recommend appropriate solutions. Call our team at Perma-Seal to get started solving your crawl space problems.
How To Fix Crawl Space Air Quality Problems
Fixing crawl space air problems involves identifying the underlying causes and implementing appropriate solutions. You can take steps to improve your crawl space air problems, but it’s often best to let a professional at Perma Seal offer a solution. Here are some steps that can help:
- Address moisture issues
- Improve ventilation
- Seal air leaks
- Insulate the crawl space
- Remove mold and other contaminants
- Control pests
- Consider encapsulation
Crawl Space Dehumidifier Installation
The PermaDry™ system is a high-performance, energy-efficient solution designed to dehumidify and purify air in crawl spaces—all without the need for a large heat exchange core. By removing excess moisture and filtering out mold spores, dust, and fine particulates, PermaDry™ helps prevent mold growth, eliminate musty odors, and create a healthier indoor environment for your home.
Why Choose Perma-Seal?
At Perma-Seal, we understand that a dry and healthy home are top priorities for homeowners in the Chicagoland area. Over the last 45 years, we have helped over 500,000 homeowners with issues ranging from humidity and air quality issues to waterproofing and foundation repair.
Contact Us for Crawl Space Humidity Control and Air Purification in Chicago
A damp crawl space can lead to musty odors, high humidity, and poor indoor air quality—but it doesn’t have to. Our Perma-Seal experts provide professional crawl space dehumidification and air purification solutions to keep your home dry, healthy, and energy-efficient year-round.
If you’re ready to eliminate moisture, reduce allergens, and improve air circulation throughout your home, we’re here to help. Call us today at 800-421-7325 or click the button below to schedule your free consultation with our specialists.
Frequently Asked Questions
What Makes the PermaDry System Better Than Standard Models?
The Perma Dry system is designed to dehumidify and improve air quality simultaneously. Unlike standard crawl space dehumidifiers, it features a dual-stage air filtration system that removes mold spores, allergens, and airborne contaminants as small as 3 microns, preventing musty odors and improving the overall health of your home.
How Much Moisture Can the PermaDry System Remove From My Crawl Space?
The PermaDry crawl space dehumidifier is capable of removing up to 100 pints of moisture per day and includes a continuous drain system to eliminate the need for manual emptying. This helps maintain optimal humidity levels and prevents mold growth in your basement.
What Is the Ideal Humidity Level for a Crawl Space?
The ideal humidity level for a crawl spaces should be between 30% and 50% to prevent mold growth, musty odors, and structural damage caused by excess moisture. If humidity consistently exceeds 60%, a dehumidifier is recommended to maintain a dry and healthy environment.
How Do Air Purifiers Help Improve Indoor Air Quality?
Air purifiers use filtration systems to remove dust, allergens, mold spores, and airborne contaminants from the air. This helps reduce allergy symptoms, eliminate odors, and improve respiratory health, especially in damp areas like crawl spaces where mold and mildew can thrive.
How Can I Tell If My Crawl Space Has Poor Air Quality?
Signs of poor air quality in a crawl space include musty odors, visible mold, excessive dust, frequent allergy symptoms, and condensation on windows or walls. Installing a dehumidifier with an air purification system can help eliminate these issues and create a healthier indoor environment.
