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Heating · Cooling · Indoor Air

Heating and Cooling Services in Northern Virginia

Top-notch HVAC service tailored to residential and commercial clients, heating and cooling solutions that keep your home comfortable, energy-efficient and climate-controlled all year. Repair, installation, and 24/7 emergency service.

4.9 ★★★★★ 154 Google reviews

Call or text 24/7: (571) 910-9901 · Text only 24/7: (571) 609-3671

Same-day appointments may be available, many fixes completed during the first visit, depending on the problem and parts.  ·  Free estimates on replacements  ·  All major brands serviced  ·  24/7 emergency repair
THE PROBLEM — AND THE FIX

Uneven temperatures, longer run times and energy bills that keep creeping up are usually the first signs, a struggling furnace or air conditioner rarely fails without warning. Left alone, small problems turn into a no-heat or no-cooling day, and an inefficient system wastes money every hour it runs.

The fix starts with finding the real cause. We diagnose first, explain your options in plain language, and complete most repairs on the spot, and seasonal maintenance keeps the system efficient, helps you follow the manufacturer's recommended maintenance schedule, and helps it last longer.

Heating and Cooling

What We Repair and Install

When your heating or cooling system stops working, you need repair that is fast, honest, and done right the first time. Our certified technicians diagnose the problem, explain your options in plain language, and complete most repairs on the spot.

Carrier air conditioner installed by 911Air-Care

Air Conditioning

AC repair, installation and replacement for central air systems, diagnosed on the spot, with your options explained before any work starts.

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Heat Pumps

Heat Pumps

Heat pump repair, installation and service, efficient heating and cooling from one system, all year long.

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Indoor Air Quality

Indoor Air Quality

A healthy indoor environment matters: air purification, humidifiers, dehumidifiers, ventilation and smart thermostats keep your home's air clean, comfortable and safe.

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Electronic water descaler installed on a home main water line by 911Air-Care More From 911Air-Care

Did you know we can also install a water descaler?

Hard-water scale shortens the life of water heaters, fixtures and appliances. A descaler protects the whole home, ask us while we're already there.

Good to Know

Repair First, Honest Options

  • All major brands of furnaces, air conditioners, heat pumps and ductless systems serviced
  • Free estimates on new systems and replacements
  • Your tech calls before heading over, so you know when to expect us
  • Keep it running longer with a seasonal maintenance plan

More About This Service

Welcome to Our

Residential Heating And Cooling Services

Heating and Cooling Services for Every Season

Good To Know

The typical lifespan of heating and cooling systems, integral components of your home’s HVAC system, generally spans between 8 to 12 years, although the actual lifespan varies with the equipment, its installation, how it is used, and how well it is maintained. Devices with prolonged lifespans often experience a decline in performance, becoming less energy-efficient. Older technology and extended lifespans can lead to frequent repairs and substantial maintenance costs, with many systems going without technical inspections for years.If you find yourself with an older system, there’s no need for concern. We’re here to help you weigh your options. Our services, routine maintenance programs, and new system installations are designed around the needs of your home. 911Air-Care provides home heating and cooling services across Northern Virginia, with a focus on keeping your home comfortable in every season.

Our Services

REPAIR and REPLACE

Our team is committed to keeping your existing system running smoothly and efficiently, with genuine parts and skilled technicians.

MAINTENANCE

Keep your home comfortable with regular care from 911Air-Care. Just as cars need regular maintenance, your home deserves the same attention. Regular care helps maintain performance, safety, and efficiency, and supports a secure and comfortable living space.

NEW INSTALLATION

If your system is over a decade old and not working properly, a new installation may be the better path. Our technicians install efficient, reliable systems, with the sizing and options explained before any work starts.

Explore Our

Indoor Air Quality Accessories

Elevate home comfort and indoor air quality! Accessories can upgrade the efficiency of your current heating and cooling system. Discover our indoor air quality improvement packages for a more pleasant home environment; the right accessories may help reduce airborne particles and improve comfort. Our advanced accessories not only enhance comfort but also contribute to reduced energy consumption. Achieve lower energy consumption and enhanced usability with our indoor air quality smart packages. Take charge of your home’s humidity levels and ensure the purity of indoor air.

Monday To Saturday, 7 am – 5 pm

See our residential and commercial HVAC services for repair, installation, and maintenance. Ask about ductless mini-split systems for zoned comfort. Need a repair? See our AC repair, furnace repair, heat pump repair and emergency HVAC services.

Service Areas

Herndon and the Rest of Northern Virginia

Quality service at competitive prices across Northern Virginia, from our home base in Herndon.

No heat, no cooling, or no hot water?

Call and a real person picks up, any hour. We find the cause and give you your options before any work starts.

No heat? Furnace diagnosis and repair, most fixes completed on the spot.
No cooling? Same-day AC repair across Northern Virginia, nights and weekends too.
No hot water? Water heater repair and replacement, emergency service runs 24/7.

Residential and commercial heating and air conditioning repair, installation, maintenance and emergency HVAC services throughout Northern Virginia.

Stay comfortable. Stay confident.
Choose 911 Air Care.

★ 4.9 · 154 Google reviews

Service Areas

  • Herndon · Reston
  • Vienna · Fairfax
  • Falls Church · Arlington
  • Alexandria · Leesburg
  • Manassas · Tysons

Contact

  • (571) 910-9901, call or text, 24/7
  • (571) 609-3671, text only, 24/7
  • 1210 Autumn Pl, Herndon, VA 20170
  • Mon–Sat, 7:00 AM – 5:00 PM
    Sunday closed · Emergency 24/7
© 2026 911Air-Care · Herndon, VirginiaPrivacy Policy · Terms and Conditions · Opt-out Preferences
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