• 571-385-3110
  • Year Established: 1979
  • Homeowners Served: 65,000+
  • Number of Employees: 35+
  • License Number(s): #2705020470
"Since 1979, Brennan's Heating and Air Conditioning has been providing homeowners and businesses throughout Northern Virginia with our award-winning customer service, outstanding products, affordable prices and superior workmanship. Whether you are in need of emergency service, preventive maintenance, a new HVAC system or you just want to learn more about how to reduce your monthly energy costs; our friendly and knowledgeable staff is always ready to help. We are here when you need us!"

Don Brennan, Owner
Principal Owners / Key Managers
Don Brennan, Owner/President
Mike Brennan, Vice President
Liz Cain, Office Manager
Joe English, Service Manager
Five Star Guarantee
We stand behind every Five Star Rated company with Our Guarantee. We've done the research for you and identified the best home service pros in your neighborhood.
Homeowner Reviews

“Fantastic service and support. We've used Brennan's for about the last eight years and couldn't be happier. His professional skill and service-oriented attitude were fabulous.”

“Gari was very polite, careful, deliberate, and knowledgeable. He was also very articulate when sharing his technical knowledge as he conducted his very thorough check of our A/C system.”

“I can't say enough awesome things about this company.”

“Signed up for maintenance contract with them. They did an install in the past, and I was very impressed with the level of service and more importantly, their level of honesty. I highly recommend them. They gave me some recommendations for some additions, but I never felt like it was a hard sell.”

  • 571-385-3110
  • Year Established: 1979
  • Homeowners Served: 65,000+
  • Number of Employees: 35+
  • License Number(s): #2705020470
"Since 1979, Brennan's Heating and Air Conditioning has been providing homeowners and businesses throughout Northern Virginia with our award-winning customer service, outstanding products, affordable prices and superior workmanship. Whether you are in need of emergency service, preventive maintenance, a new HVAC system or you just want to learn more about how to reduce your monthly energy costs; our friendly and knowledgeable staff is always ready to help. We are here when you need us!"

Don Brennan, Owner
Principal Owners / Key Managers
Don Brennan, Owner/President
Mike Brennan, Vice President
Liz Cain, Office Manager
Joe English, Service Manager
Top Company Features
  • Five Star Guarantee
  • Licensed
  • General Liability Insurance
  • Workers' Compensation Insurance
  • 24/7 Emergency Service
  • Free Estimates
Services Offered
24 Hour Emergency Service on all makes and models; Planned Maintenance Agreements; Installation of High Efficiency Air Conditioning, Gas Furnaces, Water Heaters & Heat Pump Systems; Indoor Air Quality / Duct Cleaning; Free Estimates on new HVAC equipment
Insurance
General Liability & Workers' Compensation
Warranties / Guarantees
100% Satisfaction Guarantee; 2 Year Labor Warranty on all new complete system installations; 1 Year Warranty on all service repairs; Extended Parts and Labor Warranties Available
Recognitions
NATE Certified Technicians & Installers
A+ Accredited Member of the BBB
Carrier Factory Authorized Dealer/Carrier '14-'19
President's Award