Fairfax Mechanical provides complete HVAC services to homeowners and businesses across Northern Virginia — AC installation, heating repair, duct cleaning, system tune-ups, and indoor air quality. We are licensed, NATE-certified, and available 24/7 for emergencies.
Our Services
High-efficiency central air conditioning systems sized precisely for your Northern Virginia home using Manual J load calculations. We install all major brands — Carrier, Trane, Lennox, and more.
Fast furnace and heat pump diagnostics and repair. When your heat goes out at 2am in January, we're on our way. We service gas, electric, and heat pump systems throughout NoVA.
Professional duct cleaning and sealing using HEPA-filtered vacuum systems. Essential for NoVA's older housing stock and a must-have for families with allergy concerns.
Comprehensive seasonal maintenance plans that keep your system running at peak efficiency and prevent costly breakdowns. Spring and fall tune-up packages available.
Whole-home air purifiers, humidifiers, and dehumidifiers engineered to combat the DC metro area's notorious summer humidity and winter dryness.
Fairfax Mechanical specializes exclusively in HVAC services — heating, cooling, ventilation, and indoor air quality for Northern Virginia homes and businesses.
When your system fails in a NoVA heatwave, every minute matters. Our emergency technicians are dispatched within 2 hours throughout Fairfax, Arlington, Loudoun, and Prince William for any HVAC crisis.
Fairfax Mechanical is your single source for heating, cooling, ventilation, and indoor air quality across Fairfax, Reston, Herndon, McLean, Arlington, and all of Northern Virginia. Below is a full breakdown of the HVAC services we install, repair, and maintain for residential and commercial properties.
Don't see your specific need listed? Contact Fairfax Mechanical — if it involves heating, cooling, ventilation, or air quality in Northern Virginia, we handle it.
AC installation in Northern Virginia typically costs between $4,500 and $9,000 for a central air system, depending on the size of your home and the efficiency rating (SEER) of the unit. Fairfax Mechanical provides free, no-obligation estimates and uses Manual J load calculations to ensure you get the correctly sized system — avoiding the efficiency losses that come from oversizing or undersizing.
A complete HVAC system replacement — removing the old unit and installing a new one — typically takes 6 to 8 hours for a single-system residential installation. Most Fairfax County homeowners have their new system running the same day we arrive. Multi-zone or complex ductwork modifications may require a second day.
Yes, most HVAC replacements in Fairfax County require a mechanical permit. Fairfax Mechanical pulls all required permits on your behalf at no additional charge — this protects you legally and ensures the work passes county inspection. Never hire a contractor who suggests skipping the permit process.
A heat pump is typically the more efficient choice in Northern Virginia's climate, providing both cooling and heating using electricity. Virginia's relatively mild winters — with temperatures rarely staying below 25°F for extended periods — allow modern heat pumps to operate efficiently without a gas backup. Gas furnaces deliver stronger heat output in extreme cold, which is why many NoVA homes use a dual-fuel system (heat pump + gas backup).
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Fairfax Mechanical
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