(703) 549-5700
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Making Homes More Comfortable Since 1885

T.J. Fannon & Sons is dedicated to providing the best HVAC services in Northern Virginia. Find out the difference working with a company with over a century of experience makes!

Our Partners

Thomas J. Fannon & Sons is proud to work with the following industry-leading brands:

  • Weil-McLain
  • Carrier Factory Authorized Dealer
  • AO Smith Vector
  • Nextdoor Neighborhood Favorite HVAC 2023
About Us
About Us

For over 135 years, Thomas J. Fannon & Sons has provided homeowners with the fuel and the equipment to effectively heat and cool their homes. We owe this success to our professionalism, reliability and first-class products and services.

Learn More About Us
Over 100 Years of Experience
We’ve served our local community for well over 100 years, allowing us to provide a level of expertise that only a handful of companies can match.
Our Commitment to You
We are an established company and we’re here for you. Thomas J. Fannon & Sons can provide you with the support you need after your HVAC project.
High-Quality HVAC Systems
We install world-class furnaces and air conditioning systems from Carrier®. Our HVAC systems are energy-efficient, reliable and long-lasting.
Best Heating and A/C company in the DMV! I have gone through my share of Heating and A/C companies and I have never found one as attentive and quick responding as TJ Fannon & Sons. I have had multiple problems with a gas furnace with multiple prior companies. Fannon came, installed and live up to th
Anthony M.
We have had our a/c and heating systems serviced by T.J. Fannon & Sons for over 26 years now in our three different primary residences in Fairfax County. Everyone who has ever provided service to any of our homes has been nothing but friendly, courteous and very professional (to include the people
Karen Rotach
I've used TJ Fannon for 15 years for HVAC and hot water heater. Do not need fuel oil. Have found them to be knowledgeable & meticulous in repair/replacement, & extremely helpful in an emergency--104 degrees & the a/c goes down or today when the hot water heater burst. Also honest in telling me that
Rita S.
They cleaned our oil burning furnace and inspected it prior to our move.Technician came SAME day, was thorough and kind to our handicapped dog. he accidentally left a little oil soot on the stair runner. I left a VM and the owner called me back promptly the next day and sent a fantastic lady to clea
Brooks F.
A big shout out to the wonderful business and greet people at TJ Fannon and Sons. I know this is a very busy week, with the coldest of temperatures, and they are getting many emergency calls. I called last evening and left a message (non-emergency) for them to come out and get our furnace running th
Reba W
Thomas J. Fannon & Sons is committed to quality so expect only the best HVAC services when you work with us.
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