HVAC Services The Kinder, Gentler Company

Providing Expert Solutions to Northern Virginia Since 1936

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HVAC Services in Fairfax

Residential Heating & Cooling from Northern Virginia’s Trusted HVAC Contractor

Long's Corporation has been serving Fairfax County and Northern Virginia homeowners since 1936. As a third-generation, women-owned company with over 90 years in the trades, we focus on residential HVAC and plumbing work. That focus matters: our technicians know the systems in your home, and our leadership team is personally involved in day-to-day diagnostic calls rather than managing from a distance.

We hold an A+ rating with the Better Business Bureau, a standard we’ve maintained since 1998. Generations of Northern Virginia families have trusted us with their homes, and that continuity shapes how we work.

Ready to schedule HVAC service in Fairfax? Call us today at (571) 470-5898 for same-day service when available and a free estimate.

What to Expect When You Call Long's Corporation

HVAC problems don’t follow a convenient schedule. We offer same-day service when available so you’re not left waiting through a mid-July heat wave or a January cold snap. Every job comes with our 100% satisfaction guarantee, and we price our work transparently so you know exactly what you’re paying for before any work begins.

Our technicians are fully trained and equipped to handle residential HVAC jobs from routine maintenance to full system replacement. We also provide Spanish-speaking support to make the experience accessible for every homeowner we serve.

HVAC Services We Provide

We cover the full range of residential heating and cooling needs for Fairfax homeowners:

AC Installation & Replacement: New central air conditioner installations and full system replacements sized for your home
AC Repair: Diagnosis and repair for systems that aren’t cooling effectively or have stopped working altogether
AC Maintenance: Seasonal tune-ups that can help your system run efficiently and catch small problems before they grow
Furnace Repair: Troubleshooting and repair for gas and electric furnaces
Heat Pump Installation: Heat pump systems for homes that need efficient year-round heating and cooling
Indoor Air Quality Solutions: Whole-home solutions for humidity control, filtration, and cleaner air circulation

How Fairfax’s Climate & Housing Stock Affect Your HVAC System

Northern Virginia summers bring sustained heat and high humidity that push cooling systems hard. A central air conditioner running through weeks of 90-degree days accumulates wear quickly, and a system that’s been coasting through mild summers may not hold up when the heat sets in for days on end. Winter presents its own challenge: temperatures can swing from the 50s to below freezing in the same week, putting real pressure on furnaces and heat pumps that haven’t been seriously tested in years.

Fairfax County’s housing stock adds another layer. Older neighborhoods like Annandale include homes with original infrastructure at or past its useful service life. In newer residential developments, systems are aging out of warranty and entering the years when routine HVAC maintenance becomes important for helping reduce the risk of costly repairs.

Why Licensed HVAC Work Matters in Virginia

Virginia requires HVAC work on residential systems to be performed under licensure through the Department of Professional and Occupational Regulation, which enforces continuing education, insurance, and code compliance standards. That’s not a formality. When equipment is installed without proper training, a common result is a system connected to ductwork that doesn’t match the new unit’s airflow requirements, which can reduce efficiency and shorten equipment life.

Fairfax County also requires a residential mechanical permit for HVAC installation, replacement, repair, or conversion work. Our leadership team includes licensed master tradespeople who are personally involved in diagnostic work, not just in an administrative role, so the experience behind every job runs deeper than what most contractors offer.

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Our Services

Done Right the First Time, Every Time

- Indoor Air Quality
- Indoor Air Quality

Generations of Fairfax Homeowners Have Relied on Long's Corporation

We’ve built relationships with homeowners across Fairfax County and Northern Virginia that span multiple generations of the same families. The company’s values carried it through the Great Depression and the post-war housing boom that built out much of this region’s neighborhoods. That history isn’t just a milestone. It reflects a consistent commitment to doing the job right, which is how a home services company can earn referrals from a homeowner’s children and grandchildren.

Get a Free Estimate on HVAC Service in Fairfax

Whether you need a repair, a replacement, or a tune-up before the next season, we’re ready to help. We offer free estimates and financing options so cost doesn’t stand between you and a comfortable, reliable home.

Call Long's Corporation at (571) 470-5898 to schedule your service today.

Signs Your Fairfax Home’s HVAC System Needs Attention

Some warning signs are easy to miss until they become expensive problems. If certain rooms stay noticeably warmer or cooler than others, your system may be struggling to distribute conditioned air properly. A sudden or gradual rise in energy bills without a change in weather or usage habits often points to declining system efficiency.

Other signs are harder to ignore. Unusual sounds like banging, rattling, or squealing, weak airflow at registers, or a system that cycles on and off frequently all indicate a heating or cooling system that needs a professional look. Catching these early can mean a smaller repair bill and a longer equipment life.

Indoor Air Quality & Your HVAC System

The air inside your home is directly tied to how well your HVAC system is operating. A system running inefficiently or overdue for maintenance can circulate dust, allergens, and other particles that affect daily comfort and health. Humidity control matters just as much. Too much moisture encourages mold growth; too little dries out wood, skin, and respiratory passages. A well-maintained system paired with the right indoor air quality solutions helps keep both temperature and humidity in a range that makes your home genuinely comfortable year-round.

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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.

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

Shaoxian Y.
"Very Reasonable"
We have used them several times now for various plumbing projects. Each time they are punctual, professional, and go above and beyond. Their pricing is also very reasonable compared to other plumbers in the area.

Amanda S.

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