Reliable HVAC Services in Manassas, VA

When you choose Service First Heating & Air, you’re getting more than just repairs, you’re choosing peace of mind. We’re a Manassas, VA-based HVAC company that’s dedicated to quality and built on relationships. Our crew shows up when we say we will, and we stand behind our work.

  • Honest assessments with no pressure
  • High-efficiency system options
  • Skilled technicians who respect your home

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Complete HVAC Care for Homes and Businesses

From family homes in Sudley, VA to bustling commercial properties in Manassas, VA and Gainesville, VA, Service First Heating & Air provides full-spectrum HVAC care that fits your space and needs. Our Commercial HVAC contractor services are built to keep offices, shops, and other workspaces running efficiently year-round, while our Residential HVAC contractor team handles everything from small repairs to full system upgrades in Manassas Park, VA and Bristow, VA. We offer thorough diagnostics, proactive maintenance, and heating system repair designed to prevent costly surprises and keep your system performing at its best.

Why Homeowners Choose Our HVAC Company

Our team is trusted across Manassas, VA for consistently reliable service and dependable heating and cooling solutions. With years of experience and a deep understanding of the local climate, Service First Heating & Air delivers personalized HVAC solutions that stand the test of time. Whether you need emergency repairs, routine maintenance, or a brand-new system, we tailor every job to fit your home and budget.

We pride ourselves on building lasting relationships through honest service, quality workmanship, and a genuine commitment to customer satisfaction. It’s not just about fixing systems—it’s about creating comfort you can rely on year-round.
When it comes to your home comfort, we don’t cut corners—we deliver peace of mind with every call

Years of Experience
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Proof of quality is in every installation and repair we perform

Service First Heating & Air is proud to be the team you choose for HVAC services.

Air Conditioner Services

Is your A/C ready for the summer heat? From tune‑ups and emergency repairs to custom installations, we keep you cool when it matters most.

Heating Services

Gas and oil furnaces, boilers, heat pumps, geothermal systems—you name it, we service it. Stay warm all winter long with our expert support.

Preventative Maintenance

Extend your system’s life and save on energy costs with bi‑annual inspections, coil cleaning, combustion analysis, filter replacement, safety checks, and more.

HVAC System Replacements

Time for an upgrade? Get up to $1,250 off qualifying systems and enjoy 0% financing for up to 60 months on complete replacements.

Indoor Air Quality Services

Breathe easier with our comprehensive IAQ solutions—air purifiers, humidifiers, UV germicidal lights, and duct cleaning.

How Manassas Weather Affects Your HVAC Needs

In Manassas, VA, cold winters and hot, humid summers can take a toll on your HVAC system. These shifting seasonal demands mean your equipment has to work harder—and that makes regular maintenance and efficient upgrades more important than ever.
At Service First Heating & Air, we help homeowners stay ahead of extreme weather by ensuring their systems are ready for anything. Whether it’s a mid-winter furnace tune-up or a pre-summer AC check, our services are designed to boost performance, extend system life, and reduce energy costs—all while keeping your home comfortable year-round.

Enjoy Manassas, VA While We Handle the Work

Instead of waiting around, take time to explore while we service your system. Visit the Manassas National Battlefield Park, walk through Old Town, or stop by the Manassas Museum. We’ll handle the HVAC work while you enjoy the best your city has to offer.

Grab a bite at one of the local cafés or browse the shops along Center Street. When you return, your home will be comfortable and your system running smoothly.

Our Clients Love Us

Why Manassas Homeowners Choose Service First Heating & Air

Homeowners throughout Manassas, VA, Manassas Park, VA, Sudley, VA, Bristow, VA, and Gainesville, VA trust Service First Heating & Air for HVAC services that put comfort and reliability first. We’re not just another HVAC company—we’re your neighbors, committed to providing personalized solutions that last. Whether you’re dealing with a failing system or planning an energy-efficient upgrade, our team delivers quality without the stress.

From clear recommendations to dependable follow-through, we make sure every visit is focused on comfort, care, and lasting results. We treat every home as if it were our own—because to us, every customer is part of the Service First family.
Here’s what sets us apart:

  • Honest, no-pressure system evaluations
  • Smart, energy-efficient upgrade options
  • Courteous, well-trained technicians
  • Trusted service with a focus on comfort and safety
NATE‑Certified Technicians

Our highly trained professionals deliver expert service on every visit.

Rheem Pro Partner

We install top‑quality equipment backed by industry‑leading warranties.

One‑Year Craftsmanship Warranty

Enjoy peace of mind knowing our workmanship is fully guaranteed.

0% Financing & Special Discounts

Flexible payment plans and exclusive savings for seniors, veterans, and first responders.

Emergency & After‑Hours Availability

24/7 support to resolve unexpected HVAC issues whenever they arise.

Free Same‑Day Estimates & Second Opinions

Transparent pricing with no surprises—get a quote before any work begins.

Local, Family‑Owned Since 2009

Personalized service rooted in community trust and dedication.

Preventative Maintenance Plans

Proactive care to extend equipment lifespan and maximize energy efficiency.