Local, Affordable & Reliable HVAC Service for Over 40 Years
5 Star Rated & Affordable HVAC
Repair & Installation Services
At C.D. Shanahans, we’re your local family-owned & trusted local experts for all things HVAC throughout Northern VA. Our team offers comprehensive heating, cooling, and indoor air quality services designed to keep your home or business comfortable throughout the year, with 24/7 reliability.
With a 5-star reputation built on honesty, clear communication and customer satisfaction, C.D. Shanahans is committed to providing the comfort and reliability you deserve.
Our team is here to help, so give us a call or use our form to request a free estimate today.
Your Reliable & Licensed HVAC Technicians
C.D. Shanahan is your one-stop partner for all your HVAC needs.
Heating or Cooling System Problems? CD Shanahans HVAC Technicians are Here to Help
Our Team Can Service & Install:
Heating Systems
Furnaces
Boilers
Radiators
Air Conditioning Systems
Air Purification Systems
Humidifers
Gas Fireplaces
Our Customers Save $$ with Our Specials Offers
$89 HVAC Diagnostic Fee: Diagnostic fee will be fully applied toward your recommended repairs or toward new service plans.
Price Match Guarantee: Applies to quotes on identical or similar products from an authorized competitor, verifiable with a direct link or written quote.
Free Air Purifiers: Ensure your home’s indoor air quality with a free air purifier with any new HVAC system purchase.
5% Off New Water Heaters: Discount applies with the purchase of a full HVAC system (Indoor/outdoor unit)
Ensure Peak Performance for Your HVAC System with Our Service Plans
For service plan customers, we service all brands & will perform regular inspections:
HVAC Repair Savings: The cost of maintenance is far less than installing new heating/cooling systems.
Energy Savings - Regular maintenance improve's your home's energy efficiency, lowering monthly utility bills
Improve System Reliability - Maintaining your HVAC systems helps ensure your unit won’t suddenly break down.
Add Home Value - Maintaining your systems demonstrates to prospective home buyers that you’ve invested in the regular maintenance required to maintain the home's HVAC systems.
Priority Service - Enjoy faster service appointments to minimize downtime
Read Why We Come Highly Recommended
HVAC Service & Repair FAQs
Your Questions Answered:
What areas do you serve?
We serve customers throughout Northern Virginia with HVAC maintenance, repair and installation services.
How soon can I schedule HVAC service?
We make every effort to provide superior same day service to our customers, so we encourage customers to call early in the day so we can schedule your service appointment.
What are signs that my HVAC systems needs repair or replacement?
Warning signs include uneven heating, unusual noises, frequent cycling, higher energy bills, or a yellow pilot light. If your system is more than 15 years old and needs frequent repairs, replacement may be more cost-effective.
Can my HVAC system improve my home's indoor air quality?
Yes, with HEPA filters, air purifiers, and humidifiers, your system can reduce allergens, dust, and pollutants for cleaner indoor air.
How long does a typical furnace or boiler last?
Most furnaces last 15–20 years, while boilers can last 20–25 years with proper maintenance.
Do you offer specials?
Yes we provide multiple offers to our customers to help them save on their service and on new installations.
Contact Us
Local, Affordable & Reliable HVAC Service for Over 40 Years