HVAC Repair, Maintenance & Installation Services

Northern, Virginia's Best Professional HVAC Services - Competitive Prices

C.D. Shanahan’s Heating & Cooling focuses on providing quality, friendly, and professional HVAC services in Northern Virginia. Our service areas include Burke, Springfield, Fairfax, Arlington, Lorton & more.

Learn about the various HVAC services that we offer our commercial and residential customers:

Air Conditioning

When your A/C isn’t working in the summer, is barely getting the job done, or blowing hot air it can make homes and offices uncomfortable to be in. If you’re replacing or installing a new A/C unit it’s important that it is installed properly to efficiently cool your space.

Our skilled HVAC technicians are well versed in A/C unit repair, maintenance, installation, and replacements to make sure your space is cool and your A/C runs smoothly all summer long.


There are a host of issues that could cause your A/C to not work properly or stop working completely. Common A/C problems & signs you may need an HVAC professional include:

  • Improper installation
  • Poor airflow
  • Blowing hot air instead of cool air
  • Dead thermostat batteries
  • Frozen outside unit
  • Unusual sounds
  • Dirty air filters
  • Low coolant levels

If you’re experiencing A/C issues our technicians will work promptly with you to troubleshoot and fix your issues.


Routine air conditioning maintenance can help you avoid costly repairs, save you money, and extend the life of your A/C unit. Our Air conditioning maintenance services include:

  • Air filter replacement
  • Indoor and outdoor coil inspection
  • Condensation pump inspection
  • Thermostat inspection
  • Condensate pump cleaning
  • Overall cleaning to remove dust and debris
  • Comprehensive A/C Unit inspection

Installation & Replacement

Whether you’re building a new home or building, renovating your home, or upgrading your current A/C unit, it’s important that it is installed properly. If your unit isn’t installed properly you could face the following issues:

  • Leaking water
  • Electrical issues (e.g., blown fuses)
  • Poor airflow
  • Excessive noise
  • Temperature falling far below the thermostat setting
  • High energy bills

If you need a new air conditioning unit installed or think your unit was installed improperly our technicians are ready to help.


Having your heating system malfunction during the winter can make homes, rental properties, and office spaces unbearably cold. It’s also important for homeowners to ask themselves, “is my heating system working efficiently?”. If not you could be missing out on savings on your utility bill.

If you’re considering changing your heating system entirely we’re ready to help!


Our heating repair services include:

  • Furnaces
  • Heat Pumps
  • Boilers
  • Home Radiators


Regular maintenance on your heating system keeps it running efficiently and can help you save money on your utilities. If issues are ignored for too long you may have to replace your heating system entirely which can cost thousands of dollars. Our technicians will come out routinely to ensure your heating system is running smoothly all year long to give you peace of mind.

Installation & Replacement

If your heating system is old, you’re looking to make an upgrade, installing a brand new system, or want to switch from gas to electric our technicians are experienced with heating system replacements and installations and will get the job done right.

If you’re experiencing any of the following issues it may be time to consider replacing your furnace:

  • Frequent repairs and increasingly expensive utility bills
  • Uneven heating in your home
  • Your system is running in short, frequent cycles
  • Unusual buzzing or rattling noises while running
  • Your heating unit has reached the end of its lifespan

Our technicians can help you determine if you need to replace your heating unit or if there are other minor issues causing your heating problems.

Ventilation & Ductwork

When it comes to HVAC systems the impact of ventilation on efficient heating and cooling is often overlooked. Poor ventilation can also contribute to a host of other problems such as:

  • Respiratory and allergy problems
  • Growth of mold and mildew
  • Poor sleep quality
  • Musty odors
  • Lingering pet and cooking odors
  • Uneven heating and cooling
  • Overworked HVAC systems
  • Higher utility bill

We offer a wide array of commercial and residential ventilation services to keep you healthy, comfortable, and save you money, including:

  • Air duct & vent cleaning & installation
  • Air filter replacement
  • Routine maintenance
  • Whole-house air purifier installation
  • Whole-house humidifier installation

Whole-House Air Purifier Installation

According to the EPA, indoor air can be much more polluted than the air outside (source: EPA). This is because particulates such as dust, pet dander, household cleaning products, and emissions from fireplaces and stoves accumulate in the vents of your home and contaminate the air being circulated. Having this contaminated air circulating through your home can trigger allergies, asthma, and other health issues.

While a standalone air purifier can help improve indoor air quality in a small space, it can’t cover your whole house. In-duct air purifiers can help improve indoor air quality in your entire house helping keep everyone healthy and your home odor-free.

We have a range of whole-house air purifier products that we install for our Northern, Virginia customers from AprilAire & Aerus Enterprise Solutions (AES). Watch the video below to learn how the Air Scrubber by Aerus works.

Whole-House Humidifier Installation

If you have chronically dry skin or get respiratory infections often, you may use a humidifier in your room to add humidity to the dry air in your home. Similar to standalone air purifiers this can solve the problem in one area of your home but not your whole house.

Having a whole-house humidifier can provide relief in all areas of your home so you don’t need a network of humidifiers to be comfortable. Ask us about the AprilAire whole-home humidifiers we install for our customers in Northern, VA so you can get rid of dry air in your home and live more comfortably.

The Best Professional HVAC Services in Northern Virginia

C.D. Shanahan’s Heating & Cooling provides friendly, fast, and professional HVAC services to keep your home, rental properties, and commercial properties feeling comfortable and your HVAC systems running smoothly all year long. We highly recommend asking us about our routine maintenance on your HVAC system to prevent any future repairs and save you money long-term.

Call us to discuss your HVAC needs and get a quote or fill out the form below and we will reach out to you as soon as possible to schedule an appointment.

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