Professional installation of heating, ventilation, and air conditioning systems, including furnaces, heat pumps, and mini-splits.
Regular tune-ups and inspections to ensure your HVAC system runs efficiently and extends its lifespan.
Prompt and reliable repair services for all types of HVAC equipment to restore comfort quickly.
Comprehensive electrical work, including installations, upgrades, and troubleshooting for residential and commercial properties.
Inspection, repair, and rerouting of duct systems to optimize airflow and energy efficiency in your home or business.
Ibrahima did a great job servicing our fur as. He was on-time and ready to go. Ibrahima was very knowledgeable, helpful, and above all very respectful and friendly! I specially appreciate his workmanship and dedication! Thanks Ibrahima! Kind regards, Ahmad
READ BEFORE DOING BUSINESS WITH BRENNAN! This is a review that started 11 years ago. I was in need of a more efficient heating system. Costco had a Brennan rep at the exit. I spoke with them and I ended up with a Lennox mini split installed for $6400. Everything was great. Fast forward 11 years, the outside unit failed at the coldest time of the year. I called Brennan and they sent out a tech. I was told the unit was dead and parts were no longer available. I was quoted $11400 for a lower quality system! Even with cost increases over the years, double seemed excessive. I had another tech from another company out. He told me $300 to install a new control board but it was possible there was a short that would fry the new board instantly. With further inspection, that tech found that the needed 4-wire bundle from the outside unit to the head unit was actually a 3-wire with no actual ground wire. Instead an 8 inch wire with a striped end on both ends that used the metal interior of the conduit as a jumper was used as the ground wire (See photo). The new tech told me this is most likely what caused the failure and was an improper installation. And if the permit inspector had known that's what was done, they would have never sign-off on the installation. I found a more affordable option and finally have heat again. I attempted multiple times to contact Brennan to let them known about what was found. I finally spoke with a supervisor after leaving several unreturned voice mails. I told him the situation and he basically said, it passed inspection and they wouldn't do anything about it. I told him I still have the old unit and wire to show them the problem. He said it's been too long and again that it passed inspection. I asked him if they would at least haul away the old unit because refrigerant requires a specific disposal process. The supervisor agreed to email me after he spoke with the owner. It's been months and I have received no emails or phone calls. Be warned, Brennan takes short cuts and does improper (if not illegal) installations. If you have any equipment installations done by them, speak directly to the permit inspector before they sign-off on the permit. Don't let their short cuts cost you thousands later on.
We chose Brennan Heating through Costco and paid several thousand dollars more specifically for the higher level of customer service we were promised, but the experience has been the opposite. The installation was left incomplete, multiple technicians failed to fix issues leaving us with no heat and the communication throughout the process was extremely poor. The salesperson who introduced himself as our project manager repeatedly promised phone calls he never made, and at one point even told me he was “equally frustrated,” which was incredibly upsetting given that he was supposed to be managing our project—not commiserating. We also dealt with miscommunication about a scheduled duct test and repeated scheduling issues that required family members to drop everything to let technicians in. After paying over $22,000, the lack of professionalism, accountability, and follow-through has been extremely disappointing and far below what Costco customers are led to expect. After repeated attempts to get someone to contact me to resolve our issues we felt we need to share our experience in an effort to prevent others from dealing with this. I will be sharing all details with Costco as well.
Brennan heating install my Heat pump and furniture.from Costco. Dakota service rep came and service my unit. At that to time we discussed my concerns about the lack of flow to a particular section of my house. He went underneath my house and said that the duct needs to reroute . He said that he would work up a quote and get back to me. Several weeks goes by and I haven't heard from Dakota so I called Brennan and they told me they have to speak with Dakota I never received a call. Several months has passed. I called Brennan and they again told me they would call me back with a quote. Twice they have said they would call me back and never followed through. Brennan Im sure Costco wouldn't be happy with the way you are treating their customers. Don't worry about contacting me I will take my business somewhere else.
I needed a furnace check-up/ tune up. The technician Daniel showed up on time with an awesome attitude. Very considerate about our surroundings. And went right to work. He found some things that needed attention explained to me what they were showed me a part that needed replaced gave me the cost of the part and asked me if I wanted it replaced. Daniel did all the work cleaned up and was done in no time.. He let me know my furnace was in good shape. Very professional . I would use Brennan again and again.

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Brennan Heating, Air Conditioning, & Electric is a premier provider of comprehensive HVAC and electrical services for residential and commercial clients in Seattle. With a focus on quality installations, maintenance, and repairs, we ensure your home or business stays comfortable and efficient year-round. Our team of skilled technicians is dedicated to delivering professional, timely service, backed by years of expertise and a commitment to customer satisfaction. Whether you need a furnace tune-up, a new heat pump installation, or electrical upgrades, we provide reliable solutions tailored to your needs.
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