Crawl Space Dehumidifier Installation Service

At US Pest Control, we go beyond pest management we protect your entire home from the ground up. One of the most important steps in maintaining a healthy, pest-free home is keeping your crawl space dry and properly conditioned.

Our Crawl Space Dehumidifier Service is designed to regulate humidity levels, prevent moisture buildup, stop mold growth, and reduce pest activity all while preserving your home’s structure and air quality. This service is part of our full line of crawl space solutions, which also includes vapor barrier installation, insulation removal and installation, and fungus/mold remediation.

 

Why Install a Crawl Space Dehumidifier?

Moisture is one of the biggest threats to your home’s foundation and structure. When your crawl space is damp or humid, it can lead to serious problems, including:

• Wood rot and structural damage – Excess humidity causes joists and beams to absorb moisture, leading to decay, sagging floors, and weakened support structures.
• Mold and mildew growth – A humid crawl space creates an ideal environment for mold and fungus to grow, which can lead to musty odors and poor indoor air quality.
• Pest infestations – Termites, ants, cockroaches, and rodents are all drawn to damp areas where they can find water and shelter.
• Higher energy bills – Humid air below your home can make your HVAC system work harder, driving up your energy costs.
• Poor air quality – The air in your crawl space circulates upward into your home through a process called the “stack effect.” If that air is damp and contaminated, those same conditions move into your living space.

A professionally installed dehumidifier helps prevent all of these issues by maintaining optimal humidity levels and keeping your crawl space dry year-round.

 

Homes That Benefit from a Crawl Space Dehumidifier

Our Aprilaire Crawl Space Dehumidifiers are ideal for homes with:

• Exposed soil or unsealed crawl spaces where ground moisture evaporates into the air.
• High humidity climates like central and eastern Virginia, where outdoor air entering through vents leads to condensation.
• Previous moisture or mold issues, such as visible dampness, odors, or insulation damage.
• Encapsulated crawl spaces where moisture control needs to be maintained after sealing.
• HVAC ducts or plumbing lines that run through the crawl space and can collect condensation.

If you notice musty smells, damp insulation, pest activity, or wood damage, it’s likely time to install a dehumidifier.

 

Our Installation Process

When you schedule a Crawl Space Dehumidifier Installation with US Pest Control, here’s what you can expect:

1. Inspection & Assessment – We start by inspecting the crawl space to check for moisture, humidity levels, vapor barrier condition, and overall airflow.
2. Electrical Outlet Installation – If there is no existing outlet under the home, our team installs a dedicated GFCI-protected electrical outlet in the crawl space to power the dehumidifier safely and up to code.
3. Mounting the Dehumidifier – We use Aprilaire high-efficiency dehumidifiers specifically designed for crawl spaces. Each unit is securely suspended from the floor joists, allowing optimal air circulation and preventing water contact.
4. Condensate Hose Setup – The dehumidifier removes moisture from the air and converts it into condensation. A condensation drain hose is run from the unit to the exterior of the home, where it safely drains the water outside — preventing it from pooling under the house or near the foundation.
5. System Calibration & Testing – We set the system to maintain the crawl space between 45%–55% relative humidity and test it to ensure proper airflow, drainage, and quiet operation.
6. Filter & Maintenance Setup – After installation, we register your equipment and schedule your annual filter replacement and system check, ensuring long-term performance.

 

How a Dehumidifier Helps Prevent Pests and Moisture Problems

A crawl space dehumidifier doesn’t just remove water — it changes the entire environment under your home. Here’s how it protects your home and prevents pests:

• Eliminates conditions that attract pests: Many insects, such as termites and ants, are drawn to damp, decaying wood. By keeping wood structures dry, a dehumidifier removes their main habitat source.
• Prevents rodent nesting: Mice and rats seek humid areas for warmth and shelter. A drier crawl space discourages them from settling and nesting beneath your home.
• Stops mold and fungus growth: Mold thrives in humid conditions and can destroy insulation and wood while producing airborne spores. Dehumidification halts its development and keeps the crawl space sanitary.
• Protects your home’s structure: Dry wood maintains its strength and prevents costly long-term repairs from rot or warping.
• Improves indoor air quality: By reducing humidity and musty air below the home, you enjoy cleaner, healthier air throughout your living areas.

A dry crawl space is not only better for your foundation — it’s one of the most effective long-term pest prevention tools you can have.

Warranty & Annual Maintenance

We back our crawl space dehumidifier installation with a five-year warranty and annual maintenance program to ensure continued performance and reliability.

• 5-Year Equipment Warranty: All Aprilaire dehumidifiers are registered at the time of installation and include a five-year manufacturer warranty covering defects and performance issues.
• Annual Maintenance Visit: Each year, our team returns to replace filters, inspect the drainage line, test humidity control, and ensure the system is working properly.
• After 5 Years: Once the warranty period ends, we can provide an updated quote if a new system or upgrade is needed.
• Warranty Claims: If a defect occurs within the warranty period, simply notify us — we’ll help coordinate repair or replacement with the manufacturer.

Your system is logged in our database for easy tracking, ensuring full service history and warranty protection.

Why Choose US Pest Control

• Certified crawl space experts — We specialize in the complete health of your crawl space, from moisture and mold prevention to pest control.
• Professional-grade Aprilaire equipment — Designed specifically for crawl spaces for maximum efficiency and reliability.
• Electrical and drainage installation included — We handle all components, ensuring your system is safely powered and properly draining.
• Ongoing protection and maintenance — We don’t just install and leave; we provide continued service to keep your crawl space dry and your home pest-free.
• Local and trusted — Proudly serving Richmond, Henrico, Chesterfield, Hanover, Mechanicsville, and surrounding areas.

Frequently Asked Questions