Indoor Air Quality in Fairfax, VA

Residential Indoor Air Quality Solutions Throughout Fairfax County & Northern Virginia

Most people think of air quality as an outdoor concern, something tied to traffic, pollen counts, and industrial emissions. But the EPA has consistently found that indoor air is often more polluted than outdoor air, sometimes by a significant margin. In a well-sealed Northern Virginia home, particulates, humidity, volatile organic compounds, and biological contaminants can build to levels that affect both comfort and health without anyone realizing it.

Long's Corporation has helped Fairfax County homeowners address the mechanical side of indoor air quality since 1936. As a third-generation, women-owned company, we bring the same straightforward approach to air quality solutions that we apply to every other system in the home.

Call (571) 470-5898 or contact us online to discuss indoor air quality solutions for your Fairfax home.

What's Actually in Your Home's Air

Residential indoor air carries a mix of contaminants that vary depending on the age of the home, who lives there, and how well the HVAC system has been maintained.

Dust and particulate matter, including skin cells, textile fibers, and soil tracked in from outside, are the most visible components and are captured to varying degrees by standard HVAC filters. Biological contaminants such as mold spores, dust mite debris, and pet dander are present in nearly every home and are typically too small to be captured by basic filtration.

Volatile organic compounds, or VOCs, off-gas from building materials, furniture, adhesives, and cleaning products over time. In newer, tightly constructed homes, which are common throughout Fairfax County's more recent developments, the reduced air infiltration that makes a home energy efficient also reduces the natural dilution of those compounds.

Humidity adds another layer to the picture: air that's too dry irritates the respiratory system and damages wood structures, while air that's too humid creates conditions that mold and dust mites thrive in.

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How Your HVAC System Affects Air Quality

Your home's forced-air HVAC system plays a bigger role in indoor air quality than most homeowners realize, and not always in a positive way. Ductwork that hasn't been properly sealed can pull in unconditioned air from attics or crawl spaces, introducing insulation particles, mold spores, and pest debris directly into your air supply. Coils and drain pans that go without regular maintenance provide exactly the kind of moisture and organic material that biological growth needs to establish and spread throughout the home.

On the other side of that equation, the same system is also the most effective platform available for whole-home filtration, humidification, and air purification. Equipment installed at the air handler treats every cubic foot of air moving through the system, providing consistent coverage that portable room units simply can't match. Keeping the HVAC system itself clean and properly sealed is the foundation that makes every other air quality improvement more effective.

Call (571) 470-5898 or contact us online to schedule an estimate for indoor air quality services in Fairfax, VA.

Filtration, Humidification, & UV Systems

The practical options for improving residential indoor air quality fall into three main categories:

Upgraded filtration, specifically MERV-rated media filters or electronic air cleaners, captures particulates that standard fiberglass filters let pass right through, including many biological contaminants.
Whole-home humidifiers maintain relative humidity in the 35 to 50 percent range, which is recommended for both respiratory comfort and structural stability, solving the dry-air problems that portable units can only address in one room at a time.
UV germicidal systems are installed directly at the air handler coil and use ultraviolet light to deactivate biological contaminants as they pass through the system. They're a particularly useful option for households where allergies or asthma are a concern, and they work continuously with minimal maintenance beyond periodic bulb replacement.

Our team can take a comprehensive look at your home’s air system and the air it circulates. After that, we can discuss options for cleaner indoor air that are appropriate for your needs, budget, and home.

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Why Choose Us?

Benefits of Working With an Expert Team

Immediate, Same-Day Service

Some things can't wait. We can come see you today!
100% Satisfaction Guarantee
We never leave you unhappy! We guarantee it.
Hablamos Español
Our team is proud to help with Spanish services.
Women-Owned Company

Three generations of woman-owned leadership.
Affordable Financing Options

We make services affordable with financing options.
24/7 Call Support Available

We're here to help you whenever you need us.

"10 Stars"
Long’s Corporation is the definition of high quality service. Their technicians are always courteous, efficient, and professional. If I could give a 10 star review, I would!

Katelyn M.
"Highly Recommend"
I would highly recommend Longs Corporation. They were punctual, diagnosed and fixed the same day. The technician who always comes to our house, Steve, is professional, punctual, and knowledgeable.

Stephanie K.
"Honest Company"
We switched to Long's Corporation from another company after a family member recommended Long's, and I'm so glad we did. They provided quick, caring, thorough, and honest service at fair and affordable prices.

Whitney H.
"Top-Notch Company"
I have had nothing but good experiences with this company. Always explain what the issue is and what the repair or replacement needs are. Always very respectful of my space and always clean up after themselves. Top notch.

Jennifer S.
"Detail-Oriented"
Long Corporation is a highly reputable service oriented company. Steve, is a skilled professional technician in detail, thoroughness and being straightforward. Customer service at its highest!

Cynthia A.
"Excellent Experience"
I had an excellent experience with Long’s corporation. Plumbing work was outstanding, and I will say very reasonable. I would definitely use them again, as I was thoroughly satisfied from beginning to end.

Dale H.
"Very Impressed"
Steve the technician was very impressed, professionalism, experienced, and very good communication skills! Very good representation of Long’s Corporation.

Shaoxian Y.
"Great Communication"
Their booking process and communication was excellent. When I asked to change the brand of water heater they were very agreeable and promptly made the switch. The technician was efficient, tidy and knowledgeable.

Doreen B.

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