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Brennan's Heating & Air Conditioning Our company has been serving Woodbridge and the Northern Virginia region since 1979. We don't compromise on quality - our team members pride themselves on providing the top-quality service each and every time. We attribute our success to the fact that we're responsive to our customers' needs, no matter if they're residential or commercial, large or small.

Whether you need routine maintenance or a complete system installation, our team of trained technicians is at your beck and call, and we're prepared to deliver quality services and products at an affordable price.
Services
Since 1979, we have been providing homeowners and businesses throughout Northern Virginia with our award-winning customer service, outstanding products, affordable prices, and superior workmanship. We are here when you need us! We are so confident that you will be comfortable with our services that we back it up with our 100% satisfaction guarantee.
Turn to the experts at Brennan's Heating & Air Conditioning for all of your air conditioning services in Northern Virginia. Since 1979, we've been providing our valued business and residential customers with the latest HVAC technology, installed and maintained by a team of highly qualified technicians.
When you live in beautiful Northern Virginia, you are sure to experience hot and humid summers. The expert technicians at Brennan's Heating & Air Conditioning are here to install, service, and repair your air conditioning system for year-round home comfort. If your air conditioner is showing signs of a problem, Brennan's air conditioner repair team is available to fix your system before it fails. If you are experiencing any of the issues below, our licensed, NATE-certified air conditioner repair technicians are available to help.
A heating system malfunction can be a serious problem during a storm or a very cold winter. Brennan's Heating & Air Conditioning has been providing heating equipment repair and installation to families and businesses in the Northern Virginia area since 1979. From heating repair to new heating installation, Brennan's trained emergency technicians understand your need for prompt service, and are ready to provide you with an accurate diagnosis and affordable solution to get you warmed up quickly.Emergencies rarely wait for normal business hours, that's why our technicians go above and beyond to ensure that your HVAC challenges are minimized.
Reviews (19)
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Michael Griffith
Jun 13, 2022
We were referred to Brennan's by family and we're not disappointed. Aaron Sajeski came out to service our neglected system. He was very knowledgeable, recommended course of action but was not pushy and gave additional advice and insights to help maintain our systems. The coils had been neglected prior to us moving in and looked like cardboard inside the unit.

Once he was done the system looked brand new and the house is already cooler including our upstairs which never seemed to cool correctly. Would highly recommend Brennan's and if given choice on technician would request Aaron for any of our HVAC needs.
Rette Lopp
Jun 12, 2022
I've been using Brennan's for years and I'm so glad for the team and service. Aaron recently serviced our HVAC system and he was great. On time, professional and helpful. Highly recommend Brennan's and Aaron for service and for system installation! Service: HVAC system maintenance
Frank Strickland
Jun 05, 2022
We have been with Brennan's for well over a decade and would not consider any other HVAC provider. Their technicians, such as Aaron, are thoroughly competent, professional, and courteous. You feel as if they are serving their own family. Brennan's has performed major systems replacement and ongoing routine maintenance for us - all have been excellent.
Lauren R.
May 08, 2022
Brandon from Brennan's was great. He arrived right on time to assess our 16 year old Carrier AC system. After identifying the issue, he laid out a variety of options for how to best address the problem. He didn't pressure us into making any particular decision and patiently answered all of our questions. We contacted him later that day after we made our decision and he quickly got our appointment scheduled. Would recommended.
Janet E. Janet E.
May 03, 2022
Our A/C decided to stop working on the first super hot day we needed it to. Called Brennan's and they sent a tech out same day which would already earn a 5 star for responsiveness. The tech quickly diagnosed and found out our outdoor unit quit working because the capacitor just failed. He had the piece in the truck and replaced it right then. Cost of part was $160 and labor (diagnostic fee otherwise) was $96.

Last year we called somebody else and diagnosis was less, but again it could just be last year's prices. We like Brennan's much better though. The rep on the phone was nice. The tech was thorough, kind to inform us of different things, and didn't try to sell a full replacement of our unit while ours is still in a very good condition. Would give a double 5 star if I could.
Melody Redmond
Apr 30, 2022
This morning May 21 I woke to have my house 82 degrees and climbing. My air was not working after reviewing several companies I called Brennan. The person on the phone told me tech could come today but the cast of service call is double time. I agreed, the tech would arrive around noon. Brandon arrived shortly after 12 I gave him the history, he stared checking things and explain to me his diagnosis.

The capacitor. There expensive! Brandon had one one his truck replaced the old one and now I have air. I did buy a maintenance agreement everyone should. This cost me 3 times as much not having a maintenance agreement and they would have caught this before I started my air conditioner. I have asthma and the heat and pollen would have sent me to the hospital.

Thank you Brandon! He was professional, and explain things to me and offered future assistant with a maintenance contract I believe Brennan looks out for the best interest of there customers!
Sarah Bongiovanni
Apr 21, 2022
They responded quickly and professionally. The tech showed up on time and did the work needed quickly and efficiently. Very polite and kind. The prices were fair and well communicated. Will definitely be my go-to for HVAC repair!
Christopher Drzayich
Apr 07, 2022
The Service Technician, Aaron, couldn't have been better. He was professional, knowledgeable, and extremely helpful. He was willing to take extra time to explain our system and talk through options/services that Brennan's provides. We have always had a good experience with Brennan's technicians, but Aaron exceeded expectations. We are very happy with Aaron and confident as ever that we made the right choice with Brennan's. We highly recommend them.
Renee Grebe
Mar 11, 2022
Brandon came for our twice a year servicing (we got a yearly service contract) and he was great. Brennan's called ahead of time and Brandon arrived on time. He was kind, fast, and explained everything he found to us. He was able to replace a part that was well past it's prime and the price was affordable. We are relieved to have gotten ahead of the summer heat and had our system serviced and in tip too shape before the temps change. Thanks Brennan's!
Joseph Pincus
Feb 28, 2022
I am a longtime customer of Brennan's Heating and Air and give them the highest rating. Their fall and spring maintenance inspections of my two heating and air conditioning units are very thorough and have greatly improved efficiency and comfort. On my recent visit Adam took a lot of time to check my vents and educate me on a number of very helpful issues.
Daniel Grimes
Dec 14, 2021
Mike was honest and professional. I could not have had a better technician. He took time to explain what was wrong and walked me through the steps. Amazing technician and amazing service. Service: Heating system repair
Nick Hoxter
Dec 07, 2021
Mike A is a grade A passionate and professional Hvac tech. He takes the time to educate his customers which shows his passion in his work. I believe he has been with Brennan's for 18 some years. Which shows the quality of the company itself. 5 stars across the board. Services: AC repair, Heating maintenance
Saul Arce
Dec 03, 2021
Mike is fantastic! He's been servicing my AC unit for years. Always on time and providing great feedback and recommendations to operate my AC during summer and Heating during Winter. I would Recommend Brennan's for any AC or Heating concerns, and Mike the technician to have. Services: AC maintenance, AC installation, Heating maintenance
Michael Waring
Nov 26, 2021
Brennan's is a wonderful company to work with. Great, friendly technicians. They show up on time and get the job done right. Easy to schedule. We have them come twice a year to keep our heating and AC working well. Highly recommend them. Service: HVAC maintenance
Joseph Ulisse
Nov 26, 2021
Very responsive! They were able to schedule a technician to come out same-day to troubleshoot my heater. The technician was able to quickly diagnose and repair the issue on the spot. I will be using Brennan's for regular maintenance going forward. Services: HVAC repair, HVAC maintenance, Heating maintenance
Harold Reney
Nov 02, 2021
Mike is our service man. He is always respectful by placing covers on his shoes. His knowledge and professionalism are beyond reproach. We are so happy he has returned to work. Hal and Lorraine Service: HVAC maintenance
Jessica Haidacher
Nov 01, 2021
I had the pleasure of meeting service tech, Aaron S. and he went above and beyond! I'm a first time home owner and he was very thorough in his work and he is extremely knowledgeable. I knew next to nothing about HVAC systems and after my appointment with Aaron I feel much more informed. Hands down the best service I've received from a company in a LONG time.

I couldn't be more pleased with Aaron's and the Brennan's team that facilitated the scheduling process. I will only use Brennan's moving forward.hopefully they let me request Aaron for my next service appointment!
Jo Ann Sipes
Oct 28, 2021
Mike A. is a top notch technician. I wish I could give 10+stars. We've had him service our ac and heating for almost 10 yrs. He's always punctual, polite and answers any questions we have. The office staff are always courteous as well, keeping us posted on appointment arrival. Brennan's is a excellent company for your Heating and Air Conditioning needs!
Linda Thel
Oct 20, 2021
I would award 6 stars if I could! I bought my current HVAC system from Brennan's 10+ years ago, and they have done a phenomenal job maintaining it twice a year. I cannot say enough good things about them. From the office staff to the technicians, everyone is friendly, professional, and highly competent. I plan on being a customer for life.