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AC Service

Sterling, VA

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Two-Year Workmanship Warranty

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Reliable HVAC Solutions For Your Comfort

Since 2003, Zagros Heating & Air Conditioning has provided quality climate control solutions throughout Northern VA. Our family-owned and minority-owned business features Persian-speaking staff and brings 40+ years of combined knowledge to each project. Our NATE-certified technicians receive thorough training on major brands, including Carrier, Trane, Daikin, Lennox, Rheem, Honeywell, and Mitsubishi systems. We prioritize your comfort by offering free same-day, in-home estimates and backing our work with a two-year workmanship warranty and 100% satisfaction guarantee. Contact us today to schedule your free estimate and experience AC service in Sterling, VA you can trust.

Zagros Heating & Air Conditioning

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Why Choose Us

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Free Same-Day, In-Home Estimates

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Multiple Offers Available 

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100% Satisfaction Guaranteed

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Two‑Year Workmanship Warranty

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HomeAdvisor Screened & Approved

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Excellent Customer Service

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Commercial HVAC Services

Our commercial HVAC services address the specific needs of Northern Virginia businesses. We create tailored solutions that enhance performance and energy efficiency for commercial properties of every size.
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AC Services

Beat Virginia's summer heat with our full range of AC services. Our technicians handle everything from installation and maintenance to repairs and replacements, keeping your cooling system running efficiently when temperatures rise.
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Air Quality Services

Improve your indoor air with our professional quality services. We implement effective solutions that remove allergens, pollutants, and contaminants, creating healthier indoor environments for families and employees.
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Emergency Heating and Air Repair

When HVAC systems fail unexpectedly, our team responds quickly. Our emergency repair services restore comfort fast, minimizing disruption to your home or business.
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Heating Services

Our heating services ensure comfort during Northern Virginia's cold winters. We provide reliable solutions from furnace installations to heat pump repairs, customized to your specific heating requirements.
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High Efficiency HVAC

Lower your energy costs and environmental footprint with our high-efficiency HVAC systems. We focus on installing and maintaining energy-saving equipment that performs better while costing less to operate.
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HVAC Testing

Our thorough HVAC testing catches potential issues early. Through detailed diagnostics and performance checks, we help maintain your system's efficiency and reliability over time.
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Seasonal Maintenance

Safeguard your HVAC investment with our seasonal maintenance programs. Regular professional upkeep extends equipment life, boosts efficiency, and helps avoid unexpected breakdowns during extreme weather.
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Specialty HVAC Services

Our specialty HVAC services solve unique climate control challenges. We offer customized options from zoning systems to ductless mini-splits for properties with specific comfort needs or architectural features.
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Thermostat Services

Enhance comfort and efficiency with our thermostat services. We offer everything from basic programmable models to advanced smart thermostats that adapt to your habits and save energy automatically.
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Ventilation Services

Good ventilation is crucial for comfort and air quality. Our services include duct design, installation, cleaning, and optimization for proper air circulation throughout your property.
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Water Heating Services

Trust our team for all water heating needs. We handle installation, maintenance, and repairs for both traditional and tankless water heaters, providing reliable hot water with maximum energy savings.
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Zagros Heating & Air Conditioning
Spring Tune-Up $79
Prepare your system for summer with our comprehensive Spring Tune-Up. Our certified technicians will inspect, clean, and optimize your HVAC system to ensure peak efficiency and prevent costly breakdowns.
Call Zagros Heating & Air Conditioning today at to schedule your tune-up before the summer heat arrives!

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Zagros Heating & Air Conditioning
$500 Off New Installation
Upgrade to a new, energy-efficient HVAC system and save up to $500 on complete system installation. Enjoy lower utility bills and superior comfort year-round.
Contact Northern Virginia's HVAC experts now for your free in-home consultation and estimate!

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Zagros Heating & Air Conditioning

10% Off HVAC Service & Installation for Qualified Customers

Zagros Heating & Air Conditioning is proud to offer 10% off HVAC services and installations for Military members, Veterans, First Responders, and Senior Citizens. Whether you need repairs, maintenance, or a new system installation, you can count on expert service and honest pricing.

Call today to receive our thank-you for your service to the community!

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Here's what our satisfied customers are saying...

At Zagros Heating & Air Conditioning, we take pride in providing exceptional heating and air services to our customers. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of Zagros Heating & Air Conditioning and let others know what you think.

Frequently Asked Questions

  • How often should I schedule HVAC maintenance for my home?

    Most homeowners should schedule HVAC maintenance at least twice a year, typically once in the spring for cooling systems and once in the fall for heating systems. Regular maintenance helps improve system performance, reduce energy costs, and lower the risk of unexpected breakdowns during extreme temperatures. During a service visit, technicians inspect components, clean parts, check airflow, and identify small issues before they become larger repairs. Professional AC service in Sterling, VA can also help extend the lifespan of your system while supporting more consistent indoor comfort throughout the year. Preventive maintenance is one of the best ways to protect your HVAC investment long-term.

  • What are the signs that my air conditioner may need repairs?

    There are several warning signs that may indicate your air conditioner needs professional attention. Common issues include weak airflow, unusual noises, warm air coming from vents, rising utility bills, short cycling, or inconsistent temperatures throughout the home. Water leaks, unpleasant odors, and frozen coils may also point to system problems that should not be ignored. Prompt repairs can help prevent additional damage and restore proper cooling performance before the issue worsens. Experienced technicians providing AC service in Sterling, VA can inspect the system, identify the source of the problem, and recommend the most effective repair solution for your home and comfort needs.

  • How can I improve the energy efficiency of my HVAC system?

    Improving HVAC efficiency starts with regular maintenance, clean air filters, and proper thermostat settings. Homeowners can also improve efficiency by sealing air leaks, upgrading insulation, and keeping vents clear of obstructions. Older systems may use more energy than newer models, so replacing outdated equipment can sometimes provide long-term savings. Smart thermostats and routine tune-ups also help heating and cooling systems operate more effectively. Professional AC service in Sterling, VA may include efficiency inspections that identify ways to reduce energy waste while maintaining indoor comfort. Small improvements made consistently over time can help lower utility costs and reduce unnecessary strain on HVAC equipment.

  • When should I replace my HVAC system instead of repairing it?

    The decision to repair or replace an HVAC system often depends on age, repair frequency, efficiency, and overall condition. Systems that are more than 10 to 15 years old may become less reliable and more expensive to operate over time. Frequent breakdowns, uneven temperatures, and rising energy bills can all indicate that replacement may be more practical than ongoing repairs. A professional technician can inspect your system and explain whether replacement may provide better long-term value. Choosing reliable AC service in Sterling, VA helps homeowners better understand their options while selecting equipment that fits their home, comfort goals, and energy efficiency needs.

  • Why is indoor air quality important for homeowners?

    Indoor air quality affects comfort, cleanliness, and overall living conditions inside the home. Dust, allergens, pet dander, mold spores, and other airborne particles can circulate through HVAC systems if filtration and ventilation are not working properly. Poor indoor air quality may contribute to odors, excessive dust buildup, and reduced comfort throughout the house. HVAC professionals can recommend air filters, purification systems, humidity control solutions, and ventilation improvements that help create a healthier indoor environment. Routine maintenance and AC service in Sterling, VA can also help keep systems cleaner and improve airflow so indoor air stays fresher and more comfortable year-round.

  • What should I expect during a professional HVAC service appointment?

    A professional HVAC service appointment typically includes a full inspection of the heating or cooling system to identify performance issues and maintenance needs. Technicians may inspect electrical connections, test thermostat operation, check refrigerant levels, clean components, evaluate airflow, and inspect safety controls. They may also look for signs of wear that could lead to future repairs if left unaddressed. The goal is to improve efficiency, reliability, and overall system performance while helping homeowners avoid unexpected breakdowns. Choosing experienced professionals for AC service in Sterling, VA helps homeowners receive thorough evaluations, honest recommendations, and dependable solutions tailored to their heating and cooling systems.