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Furnace Repair & Installation Service in Northern Virginia

Since 1979, Brennan’s Heating & Air conditioning has been the go-to furnace repair and installation experts for Prince William County, Fairfax County, Stafford, Manassas, Gainesville, Alexandria, and Arlington. As a Carrier factory authorized dealer (FAD), Brennan’s Heating & Air Conditioning features the latest energy-efficient heating systems that will not only reduce your utility bills but keep you more comfortable all year long.

Furnace Repair

Today’s furnaces and HVAC systems are smarter and have many more moving parts than those in the past. Brennan’s licensed, certified technicians will inspect, clean, and lubricate your entire heating system as part of a standard tune-up. We believe preventive maintenance is critical for keeping your home comfort investments in excellent working order. During our maintenance checks, if we find an issue that may cause your furnace to fail, we will alert you, so you have the upper hand in averting a breakdown.

With more than 35 years in business, we understand what can happen when mechanical equipment goes unchecked. That’s why our technicians are trained to troubleshoot even the toughest of problems and provide quality customer service. Subsequently, the preventative maintenance we provide for your furnace and HVAC systems is proven to:

  • Prolong the life of the furnace
  • Avoid emergency repairs
  • Maintain energy efficient functionality
  • Reduce monthly heating bills through early detection of leaks and other problems
  • Provide cleaner, healthier air for your home and business


If a furnace repair is required, you can rest assured that we deliver the highest quality service and we will do the job right the first time. Every technician employed by Brennan’s is trained and certified through the North American Technician Excellence Certification Program (NATE), the leading program in the HVAC industry. NATE-trained technicians is more than a certification program. The association ensures that all of its member technicians meet and exceed high industry standards, thus ensuring the high quality of your furnace service.

Furnace Installation

Brennan’s Heating & Air Conditioning is also your local expert for furnace installations in Northern Virginia. When it’s time to replace your furnace, our knowledgeable representatives will outline all available options. We will properly size your home through industry standard Manual J calculations and inspect ductwork to make sure you will have the appropriate furnace for your home. We will also outline all available options that can increase comfort and energy efficiency even more.

If your furnace is 10 years old or more, you may be considering a new high-tech furnace. Contemporary Carrier furnaces are far more energy efficient than those manufactured just a decade ago. Today’s furnaces have at least 90 percent efficiency, while some even have as high as 98 percent AFUE (annual fuel utilization efficiency). These numbers represent the percentage of fuel that goes directly towards heating, while the remainder escapes into the atmosphere as waste. Add options such as two-stage heating, and variable motors and you can save even more.

  • 2-stage heating allows your furnace to run at 60 percent capacity during the off-season and 100 percent capacity in winter.
  • Variable speed motors allow you to manage the force behind the blower – an excellent option in very cold weather.


Furnace Repair, Installation and Service When You Need It

At Brennan’s Heating & Air Conditioning, we are excited about the changes in home comfort technology and we are proud to serve Woodbridge and all our Northern VA neighbors. Whether you need furnace repair, air conditioning installation, or want to discuss the new zoning systems, Brennan’s is here when you need us! Call our office today at 703-783-0145 to schedule furnace repair or service, or request an appointment online.

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