Catering to Your HVAC Needs Since 1885
Thomas J. Fannon & Sons is proud to be the most trusted and most established HVAC contractor in Northern Virginia. We have been in the heating, air conditioning, and air quality business for 135 years. If you live in Alexandria, Annandale, Arlington, Clifton, Fairfax, Falls Church, Lorton, McLean, or Springfield, chances are, we’ve provided you or your neighbor with our top-notch HVAC products and services.
What We Offer
Whether you live in a single-family home, a townhouse, or a condominium, or own a small business in the area, you can count on the Thomas J. Fannon & Sons’ team of HVAC professionals for high-quality home comfort equipment and dependable heating and cooling services.
For 135 years, we have been making good on our promise: to be professional and courteous at all times, while still prioritizing the needs and preferences of our customers.
We have a same-day installation policy on our water heaters, but we can also install boilers, furnaces, air conditioners, heat pumps, humidifiers, air cleaners, and even complex ductwork in a timely manner. When you choose us for your HVAC needs, you can rest assured that the job will be done right the first time around. We also believe that we are only as good as the products we offer, so we make it a point to offer nothing but the best equipment in the industry.
Our Service Areas
- Alexandria
- Annandale
- Arlington
- Burke
- Clifton
- Fairfax
- Fairfax Station
- Falls Church
- Fort Hunt
- Franconia
- Great Falls
- Gunston
- Herndon
- Kingstowne
- McLean
- Mount Vernon
- Oakton
- Reston
- Springfield
- Vienna
Local Reviews
OUTSTANDING AND AMAZING
GFour - Alexandria, VA
Fannon & Sons ears SIX stars from us on the project of removing our non functioning air conditioning unit and installing a new one. All members of the Fannon team were experienced and knowledgeable. They kept us informed of each step being taken. Some work had to be undertaken in areas of the house and on the roof where there was limited access. Their plans included provisions to protect against collateral damage while moving large and heavy parts up and down a ladder to the 3rd story of our home. The work was outstanding. The team was absolutely amazing.
T B.
Damon B.
Serviced and repaired water leaks on a old oil fired boiler
Andrew R.
Installed carrier 14 seer ac and adp coil
Thomas F.
Another beautiful day on the roofs of Old Town!
Thomas F.
Old Town Alexandria rooftop experts with a new Carrier Air conditioner
Brendon J.
Ac check
Brendon J.
Ac estimate
William J.
Another fine install job done by t.j.fannon and sons !
T B.
Oil delivery
T B.
Oil delivery
T B.
Delivering oil
Scott H.
50+ year old boiler still firing up strong
Damon B.
New Weil McLain gas fired boiler
Scott H.
‘Tis the season! New rooftop Carrier heat pump installation
Damon B.
Weil McLain Gas boiler
James H.
Customer out of oil on a cold morning gets a quick 5 gallons to hold until the truck arrives
James H.
This old boiler once burned coal, now oil, but we always get them going
Thomas F.
Customer in need of a new Carrier A/C !!
Thomas F.
Diagnosing and repairing a leak in an old radiant floor system
