Brennan Heating
HVAC Services in Seattle
Brennan Heating specializes in Carrier HVAC installation, repair, and maintenance. Proudly serving Seattle and the surrounding areas, we deliver reliable HVAC solutions to meet your home's needs.
Experience and Certifications
Experience and Certifications

Cool Cash
We participate in Carrier Cool Cash rebates. With the support of Carrier, during select times of the year Cool Cash rebates might be available when you purchase a qualified Carrier heating and cooling system.

Cool Cash
We participate in Carrier Cool Cash rebates. With the support of Carrier, during select times of the year Cool Cash rebates might be available when you purchase a qualified Carrier heating and cooling system.
HVAC Repair and Services

AC Repair & Service
We specialize in fast, reliable air conditioner repair and service to keep your home cool and comfortable. Whether it’s a minor fix or a major repair, we're here to ensure your AC runs smoothly when you need it most.

Furnace Repair & Service
We provide expert furnace repair and service. Our skilled technicians are ready to quickly diagnose and resolve any issues, keeping your home warm and comfortable year-round.

Heat Pump Repair
Count on us for dependable heat pump repair and service to keep your home comfortable year-round. Our experienced technicians troubleshoot issues, perform timely repairs, and ensure your system is operating at its highest efficiency.

HVAC Maintenance
We offer annual HVAC maintenance to keep your system running efficiently and help prevent unexpected breakdowns. Through a thorough inspection and tune-up, we ensure your heating and cooling system is ready to keep you comfortable all year long.
HVAC Installation Services

AC Installation
Enhance your home’s cooling and energy savings with our expert AC installation services. We install high-performance Carrier air conditioners and customize each system to match your home’s needs, helping ensure dependable comfort all summer long.

Furnace Installation
Stay warm and worry-free with our professional furnace installation services. We’ll guide you in selecting the best Carrier furnace for your home and complete the installation with expert care and precision.

Heat Pump Installation
Upgrade your home’s comfort and efficiency with our professional heat pump services. Our team installs top-quality Carrier heat pumps and tailors every system to fit your space, delivering reliable performance through every season.

HVAC System Installation
We provide expert HVAC installation to keep your home comfortable year-round. Whether you're replacing your current system or installing HVAC for the first time, we'll help you choose the right solution for your needs and handle the installation with precision and care.
Trusted HVAC Professional in Seattle
Happy with Brennan
May 16, 2023
Brennan did everything they promised in a timely manner
Alexis
Expertise (5)
Service (5)
Solve Problems (5)
Disfunctional Opperation
April 04, 2023
I thought Brennan had a good reputation. It must be from work they have done in the past. Our experience working with them (2023\-2024) was incredibly frustrating. Internally, we experienced very poor communication within their business. Attempting to schedule with them was very difficult. So many people we interacted with over the course of the project didn't seem to know what was going on. Appointments were scheduled and no one showed up. Appointments were cancelled, and people showed up anyway. We received a lot of contradictory and mis\-information. We were charged for half of the project well before they said they would charge us, without our consent. There seems to be a palpable sense of instability within the organization at this time. Hopefully, they can right the ship. But as of now, I would recommend staying away until they can get back on track.
Josh
Expertise (3)
Service (1)
Solve Problems (1)
Great heat pump install
March 30, 2023
The guys from Brennan did a great job installing our new heat pump. They arrived as promised, were quick, and left everything clean and in order. We have used Brennan before and have always been satisfied.
Paul
Expertise (5)
Service (5)
Solve Problems (5)
Owner
April 18, 2022
Not serviced yet
Gary
Expertise (1)
Solve Problems (1)
Replacement of 2 gas furnaces to one gas and one heat pump with air handler
April 03, 2022
After research and 4 quotes, we chose Brennan to install 2 new furnaces in our home of 3200 sf. We replaced one gas furnace for our less\-used downstairs with a gas furnace, and replaced the upstairs main living space gas furnace with a heat pump and air handler. We were committed to decreasing our carbon footprint. We were told that electrical bills would be a little higher. When we started getting the bills, we were flabbergasted! After living with our new furnaces since late Sepetmber, 2021, we feel the need to give you information about how the bills come in after a conversion such as ours. Comparing our November 2020 – February 2021 electric and gas bills with 2 old gas furnaces, to November 2021 \- February 2022 electric and gas bills, this is how it went: Seattle City Light Nov\-Dec 2020 $184.48 Nov\-Dec 2021 $505.27 Jan\-Feb 2021 $243.49 Jan\-Feb 2022 $890.42 Puget Sound Energy Nov\-Dec 2020 $339.52 Nov\-Dec 2021 $121.70 Jan\-Feb 2021 $387.60 Jan\-Feb 2022 $219.57 Out of pocket: $1155.09 $1736.96 In a nutshell: • Original interactions with saleperson for quote and follow up was all positive • Installation was timely and efficient but no instruction nor owner's manuals were given. We received all the technical installation manuals! But received (and still have) no information about the significance of "Aux" or "Emerg" heating on the thermostat. • When the new high electric bill arrived, saleman arranged for a tech to come to check everything • The Tech was also efficient, kind and very infomative. He was the first to tell us about how heat pumps and air handlers should be set totally differently than how we have previously set gas, with little swing in day and night temperatures, along with other settings to decrease electricity use. We experienced a great deal of disappointment in Brennan because of the surprising tripling of our electric bills. We now acknowlege that our gas bills went down, but hadn't put this all together at the time. Consequently, many of our friends and family heard about our dismay with Brennan. Our conclusions are that a bit of education (maybe a one pager), and even some hand holding, about an expensive system for which we have no experience would have made all the difference in the world in how we felt about our investment with Brennan.
John
Expertise (4)
Service (3)
Solve Problems (3)
Excellent
March 30, 2022
Very pleased
Philip
Expertise (5)
Service (5)
Solve Problems (5)
Satisfactory
March 16, 2022
The reason I gave 5 stars was because James Basilonia was excellent, professional,knowlegeable and addressed all my concerns with Carrier product .
Carol
Expertise (5)
Service (5)
Solve Problems (5)
Caring and QualityService!!!
March 04, 2022
They were recommended by PSE
Charles
Expertise (5)
Service (5)
Solve Problems (5)
Smooth
March 02, 2022
Great job. Well done, and very pleased with new furnace.
David
Expertise (4)
Service (4)
Solve Problems (4)
Furnace Replacement with air cleaning added
May 13, 2021
This is the fouth furnace was have received from Brennan for our rental properties, HIGHLY recommended.
Greg
Expertise (5)
Service (5)
Solve Problems (5)
Excellent
May 12, 2021
We are current customer with Brennon.
Marwan
Expertise (5)
Service (5)
Solve Problems (5)
This company could use better customer service and clearly has communication issues
April 26, 2021
I had an issue with the first Brennan employee I encountered who came out to do the bid. Due to issues with that employee the initial estimate expired. When I called the company to see if I could get the same estimate, she said that I would have to contact the original employee as they apparently cannot see the estimates in the computer system. I don't understand why an employee would not be able to see estimates from another employee with their company. I have never encountered that issue because most companies have that as part of the database. I didn't explain why but requested someone else come out to give me an estimate. That employee was very nice and friendly but he did not include an upgrade that was in the first estimate. I told him I could show him that estimate but he never even volunteered to offer to discuss it with his manager. The more I thought about it, the more it bothered me so even though I didn't want to get the original employee in trouble, I contacted the employee who gave me the second estimate and he provided me the email address of his manager. He contacted me to say that his manager would like me to forward the initial estimate and emails to the manager's email address which I had already done. I think the day before the install the employee called me back and said the manager had okayed the upgrade. I have never had a manager use an employee as a go between. I was never contacted by the manager directly. I also realized the night before installation that I had never been given a window of when they would arrive or how much advance notice they would give me before arriving. This is also an issue I have not encountered and I should mention that in the past year and a half I have dealt with many contractors for various home improvement projects. The installers were friendly, efficient and knowledgeable. However, I was not advised that another employee would be coming by to do heat duct testing so I was surprised when another employee showed up.
Janet
Expertise (5)
Service (2)
Solve Problems (4)
Air Condition unit installation
March 25, 2021
Unambiguous cost, competitive price, through explanation of hardware and process, experienced workers, and respect of my property.
Jim
Expertise (5)
Service (5)
Solve Problems (5)
Smooth Process Start to Finish
March 23, 2021
Initial up\-front diagnosis provided options. Pricing was competitive. Prompt service/delivery and a high\-quality installation.
John
Expertise (5)
Service (5)
Solve Problems (5)
Excellent, efficient and professional installation and service!
March 08, 2021
Technicians who installed our system were great. Brennan Heating and Service did a great job. Had one glitch due to design of our house and the technicians brainstormed multiple solutions with us and let us decide what to do. It involved some extra work which they took care of with no hesitation whatsoever and did very well.
Doug
Expertise (5)
Service (5)
Solve Problems (5)
Outstanding in every respect
March 06, 2021
They are very knowledgeable, helpful, courteous and professional and the quality of their work is superb.
Gerald
Expertise (5)
Service (5)
Solve Problems (5)
Fast professional service
January 09, 2021
Brennan installed my new furnace and air conditioning within a week. Fast service without problems.
Lisa
Expertise (5)
Service (5)
Solve Problems (5)
Very Good Service
January 08, 2021
My furnace brokedown and I needed a new one. Brennan came through in a timely manner and were very professional. Thank you!
Richard
Expertise (5)
Service (5)
Solve Problems (5)
Good product
January 07, 2021
Very helpful deciding which new furnace to install. However, they did not install an emergency shut\-off part, and the furnace did not pass inspection with the City. Difficult getting a convenient appointment to fix the issue.
Jane
Expertise (4)
Service (3)
Solve Problems (4)
Excellent job.
November 27, 2020
This installation was a simple replacement, so there was minimal problem solving needed.
Paul
Expertise (5)
Service (5)
Solve Problems (3)
Spectacular experience
November 24, 2020
Everything about the entire process has been perfect.
Jim
Expertise (5)
Service (5)
Solve Problems (5)
New Gas Furnace
November 19, 2020
Nice job, was a tough one that they found a way to make work.
CJ
Expertise (5)
Service (4)
Solve Problems (4)
Install Review
November 19, 2020
Only comment, I cannot close the door to the HVAC room because of some interference with the door and gas line. Need Brennan to come out and fix.
Kalani
Expertise (5)
Service (5)
Solve Problems (5)
Professional!
November 19, 2020
Great overall experience with Brennan !
Janet
Expertise (5)
Service (5)
Solve Problems (5)
Great service!
November 04, 2020
We have used Brennan Heating for several years and have always been happy with their service.
HaIley
Expertise (5)
Service (5)
Solve Problems (5)
Furnace replacement
November 02, 2020
On time, good work
Min
Expertise (5)
Service (5)
Solve Problems (5)
Furnace replacement, quality work and happy client
October 28, 2020
The Brennan crew did a fantastic job of replacing an old furnace with a new Carrier. We are very happy clients now.
Gunnar
Expertise (5)
Service (5)
Solve Problems (5)
Great Experience, but needs work on follow up.
October 05, 2020
The equipment, scheduling and installation went very well and we are happy with the result. We have, however, not been able to get an answer to a very simple question the install tech could relay to us. The company, however, either doesn't know who did the work or is unwilling to have him talk with us. Otherwise, the experience was first rate.
Bill
Expertise (5)
Service (3)
Solve Problems (5)
don't know what this means
October 05, 2020
excellent service by Brennan !
Janet
Expertise (5)
Service (5)
Solve Problems (5)
It works
July 24, 2020
Used Brennan before
Ian
Installation complete
July 13, 2020
Install complete
Brandon
Expertise (2)
Service (2)
Solve Problems (2)
Lots of hand offs - poor accountability.
July 12, 2020
Inexperienced installer. Duct work never came to pressure. They left me with a new furnace but an unsolved problem.
Jeff
Expertise (2)
Service (2)
Solve Problems (2)
Great Install
July 09, 2020
No stress install,
Marcus
Expertise (5)
Service (5)
Solve Problems (5)
Winter Furnace Rescue
July 08, 2020
In the middle of a pandemic, they delivered on\-time and high quality.
Kim
Expertise (4)
Service (5)
Solve Problems (5)