• 571-385-3110
  • Year Established: 1979
  • Homeowners Served: 65,000+
  • Number of Employees: 35+
  • License Number(s): #2705020470
"Since 1979, Brennan's Heating & 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
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Homeowner Reviews

“The crew's work was beautiful, and the furnaces worked perfectly from the beginning. Neal is a very professional sales rep, also. Everyone that I dealt with at Brennan's Heating & Air Conditioning has been very pleasant. I would highly recommend Brennan's to anyone needing their HVAC systems repaired or replaced.”

“I have been a customer of Brennan's Heating & Air Conditioning for over 30 years and have received nothing but the best service from the whole team.”

“Love the new unit. It works much better than our old unit. The installers were very professional, courteous, and knowledgeable.”

  • 571-385-3110
  • Year Established: 1979
  • Homeowners Served: 65,000+
  • Number of Employees: 35+
  • License Number(s): #2705020470
"Since 1979, Brennan's Heating & 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, and heat pump systems
Indoor air quality and 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 on staff
A+ Rated and Accredited with the BBB
Carrier Factory Authorized Dealer
Carrier President's Award winner 2014-2019