Heating & Air Conditioning in Alexandria, VA
Serving neighborhoods in Alexandria with same-day reliable AC & heating repairs, installations, and maintenance with local certified technicians delivering consistent professional service.
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20 Years of Locally Trusted Installation, Repairs, & Maintenance
HVAC & Plumbing Unlimited provides comprehensive service on all heating and cooling systems, from legacy setups requiring specialized handling to the latest high-efficiency units. Our NATE-certified technicians bring extensive troubleshooting experience to every job, delivering reliable resolutions and locally recognized, top-tier service.
Need immediate service in Alexandria, VA? Call (571) 360-4520 now.
Emergency HVAC Services
While we serve all customers until 8 p.m., overnight emergency service (after 8 p.m.) is available for contract customers only. Want to sign up? Call (571) 360-4520 today! If you need immediate service, we’ll send someone over ASAP.
We Serve All Alexandria Neighborhoods
Neighborhoods we serve: Old Town, Old Town North, Del Ray, Rosemont, Potomac Yard, Eisenhower Valley, Carlyle, Beverley Hills, Seminary Hill, Cameron Station, Arlandria, West End, Belle Haven, North Ridge, Braddock Heights, Taylor Run, Fairlington, Parkfairfax, Landmark, Warwick Village, Clover/College Park, Lynhaven, and Hollin Hall.
HVAC & Plumbing Unlimited is in and out of homes across Alexandria every week, and over the years we’ve familiarized ourselves with the city’s quirks. Old Town’s historic rowhouses weren’t built with modern ductwork in mind, so we often recommend ductless mini-splits instead of forcing in a traditional system. Humidity off the Potomac regularly pushes past 70% in summer, so systems here have to work harder just to keep up, which is why getting the sizing right matters more in Alexandria than in a typical suburb.
Our Alexandria Heating & Air Conditioning Services
24/7 EMERGENCY SERVICE
If you’re having a home emergency, you don’t want to wait a minute too long. That’s why our technicians and plumbers are available to solve problems 24 hours a day, and that includes weekends and holidays. After all, things always break at inconvenient times.
ALEXANDRIA AC REPAIR
Fast, reliable AC repair in Alexandria to restore cooling when your system isn’t keeping up. Whether you’re dealing with weak airflow, warm air, or a complete breakdown, we diagnose the issue quickly and get your system running properly again.
DUCTLESS MINI-SPLIT SYSTEMS
Looking for a practical and affordable way to add air conditioning to a new part of your home or improve the temperature in a room that just never gets comfortable? Ductless mini-split systems are powerful wall- or ceiling-mounted devices that heat and cool without expensive ductwork.
AC INSTALLATION IN ALEXANDRIA
Need a new air conditioner? Our team can help you choose the right system for your home and install it with expert precision. From energy-efficient upgrades to full replacements, we make sure your new AC is built to last and ready to handle the summer heat.
Furnace Repair
Get fast, reliable heating repair from experts local to Alexandria. Available for emergency repairs, we fix all the types and brands of furnaces to restore comfort and safety to your home.
Furnace Replacements
Get fast, reliable furnace replacements from experts local to Alexandria. We replace all furnace types and brands with systems that restore dependable heat, improve efficiency, and keep your home safe and comfortable.
HEAT PUMP SERVICES
Stay comfortable year-round with expert heat pump services. We provide fast repairs, professional installations, and preventive maintenance tailored to Northern Virginia homes.
THERMOSTATS
Still using the same mechanical thermostat Grandpa had in his home? Today’s smart thermostats are designed with features that can make your home even more comfortable and reduce your energy bills. Many let you adjust the temperature wherever you are by using your phone.
CONTROL HUMIDITY YEAR ‘ROUND
Muggy summers and bone-dry winters no longer need to be a problem. We offer a complete array of products that put you in control of your home’s humidity all year long. From dehumidifiers that outpower summer humidity, to whole-house humidifiers for winter comfort, we can help.
AIR PURIFIERS
Today’s air purifiers don’t just clean the air. They purify it by removing pollutants and other contaminants so you and your family won’t breath them. That will keep everyone, especially asthma and allergy suffers, feeling at the their best.
HVAC Repairs We Do
From central AC units to furnaces, boilers, and heat pumps, our technicians repair every type of heating and cooling system. Here’s what we handle:
Air Conditioner Repairs: diagnostics & troubleshooting, refrigerant leak repair, compressor & motor repair, thermostat calibration/replacement, ductwork inspection & repair.
Furnace & Boiler Repairs: ignition & pilot light repair, thermostat repair, airflow & cycling repair, pressure valve & leak repair, fuel line repair.
Heat Pump & Ductless Mini-Split Repairs: refrigerant repair, defrost cycle repair, compressor repair, thermostat repair, indoor/outdoor unit repair.
HVAC & Plumbing Unlimited: Tailored AC & Heating Installations Built to Last
Need a new system? HVAC & Plumbing Unlimited provides expert heating & AC installation and replacement services for homes across Northern Virginia. We install a wide range of air conditioning and heating systems and help you choose what fits your home and budget best.
We install all major system types, including:
✓ Central air conditioners
✓ Ductless mini-splits
✓ Heat pumps (for heating and cooling)
✓ Furnaces (gas, electric, and high-efficiency)
✓ Packaged HVAC units
✓ Zoned comfort systems for multi-room temperature control
From system selection to final testing, we make the installation process simple, seamless, and stress-free.
Affordable Wells Fargo Financing
Money should never stand between your family and reliable comfort. That’s why we offer flexible financing options through Wells Fargo, making it easier to move forward with needed repairs or a full system replacement without delay.
With approved credit, you can install your new HVAC system or complete major repairs now and spread payments out over time. It’s a simple, convenient way to protect your comfort while managing your budget.
Call (571) 360-4520 now to schedule your free in-home consultation.
When to call us for Emergency Service
If you see any of the signs below, call (571) 360-4520 right away.
Burning odors or sparks: If you smell burning plastic, sulfur, or see electrical sparks, shut off your main breaker immediately and call us. This is a severe fire hazard.
Total loss of heat in freezing weather: When outdoor temperatures drop below freezing, a broken furnace can cause dangerous indoor conditions and freeze your pipes.
Total loss of AC during extreme heatwaves: If your cooling fails during a severe heatwave, it poses a direct health risk to elderly family members, infants, or pets.
Gas or carbon monoxide alerts: If your CO detector goes off or you smell gas (a rotten-egg odor), evacuate your home immediately, call 911, and then call us.
Heavy, active flooding: Large pools of water leaking rapidly from your indoor unit can ruin your ceilings, floors, and drywall if not stopped right away.
Non-Emergencies: Schedule Standard Service
The following issues are urgent but can safely wait for a standard, next-day service appointment to avoid extra after-hours fees:
- Weak airflow from your vents.
- Uneven temperatures between rooms.
- High indoor humidity levels.
- Ice buildup on your outdoor unit (just turn the system off to let it thaw).
- Minor, consistent noises like a faint clicking or rattling.
Get fast heating and cooling repairs from local technicians. Call (571) 360-4520 now!
HVAC Maintenance Membership
Your HVAC system accounts for about 40% of your home’s total energy use, well-maintained systems can save homeowners $30+ per month on utility bills and cut equipment repair costs by 12-16%, while extending system life by up to 20%.
Call us to find the right plan for your home.
Frequently Asked Questions
What heating & cooling services do you provide in Alexandria?
We provide complete residential heating and AC services, including air conditioning repair and installation, furnace repair and replacement, heat pump service, ductless mini-split systems, indoor air quality solutions, and seasonal maintenance. Whether your system needs a simple repair or full replacement, we handle both routine and complex jobs.
How do I know if my heating and air conditioning system needs repair or full replacement?
Several factors determine this: system age, repair frequency, energy efficiency, and overall performance. If your system is 12–15+ years old, requires frequent service calls, or struggles to maintain consistent temperatures, replacement may be more cost-effective long term. If the issue is isolated (such as a capacitor, blower motor, or thermostat), repair is often the better option.
What are common HVAC problems in Alexandria homes?
In summer, common issues include refrigerant leaks, frozen evaporator coils, failed capacitors, and clogged condensate drains due to humidity. In winter, heat pump defrost issues, ignition failures in gas furnaces, and airflow restrictions are common. Older homes in Alexandria may also have undersized or aging ductwork that affects system performance.
Are heat pumps effective in Northern Virginia’s climate?
Yes. Heat pumps are widely used in Alexandria because they provide both heating and cooling efficiently in moderate climates. However, proper sizing and installation are critical for performance during colder winter nights. In some homes, dual-fuel systems may be recommended.
How often should HVAC maintenance be performed?
Cooling systems should be serviced in the spring before peak summer demand, and heating systems should be inspected in the fall. Routine maintenance improves efficiency, reduces breakdown risk, and helps extend equipment lifespan.
How long does a typical heating and cooling system last?
Air conditioners and heat pumps typically last 10–15 years. Gas furnaces often last 15–20 years with proper maintenance. Lifespan depends heavily on usage, installation quality, and routine service history.
What size HVAC system does my home need?
System size is determined through load calculations based on square footage, insulation levels, window placement, and duct design. Oversized or undersized systems can lead to comfort issues and higher energy costs, so professional evaluation is important.
Do you service older homes in Alexandria?
Yes. Many Alexandria properties, especially in established neighborhoods, have older ductwork, limited attic space, or aging mechanical systems. We assess the entire setup to ensure repairs or replacements are compatible with the home’s structure.
What indoor air quality options are available?
We offer air purification systems, whole-home filtration, humidity control solutions, and ventilation improvements designed to reduce allergens, improve airflow, and maintain balanced humidity levels.
Do you offer financing for new HVAC systems?
Yes. Financing options are available for qualifying installations to help spread out the cost of major system upgrades.