HVAC reviews in Seattle, Washington

Being a former teacher, I give them a grade of "C or C-".
I'm not sure if someone else took over this business, sold it, restructured or something. I also have a guess they changed their computer and communication systems. I have used Brennan for the last 7 years. This past year has been a challenge getting my pre-paid service taken care of. I know it seems weird to prepay for the next service but they give a discount and a discount on parts. I'd rather have better service than cheaper service. If you only want to do commercial work, then just get out of the consumer business all together. Don't be mediocre.
There are too many other HVAC companies out there highly recommended. I could go to Overlake or Greenwood or any other with plenty of 4.5 star reviews within 10 miles of my home.

Spent $20K on a 4-head mini-split AC system in spring '22. It failed mechanical inspection, and now having used it during the summer we find it loses refrigerant pressure, and one condensate drain line has leaked and caused $$$k mold damage (and continues to leak after a "repair"). They said they would cover the cost, but the headache is on me to fix the damage and hound them to solve the issues. Like many reviewers I find them unresponsive and pretty unconcerned. I do not recommend. Do they pay attention to their reviews I wonder? 24 complaints on BBB.

I’m only giving 1star because it’s required to mark 1-5. Let me start out saying when I called to schedule an appointment to get an estimate for work done in my house, they were prompt and kind. They came to my house on Nov 1st, 2024. The technicians were quick, polite and answered all my questions. I was informed by the technician that I would be getting an estimate and then could schedule the repairs needed. I have yet to receive my estimate, I’ve called multiple times. I was told the technician was out on Vacation and forgot to process the estimate and when returning, he could push it through. About a month later I called again since I didn’t hear anything and was told they would reach out the technician and call me back. Still nothing… I then received an email and text saying a technician was on his way to my address (I am not sure why) so I called the office and no answer, I called a few times and haven’t heard anything still and it’s now the end of April 2025. I highly suggest going with a different company, maybe one that will follow through with what it says and not leave customers waiting to get work done for months.

Bryan and Michael arrived early as I requested and worked hard to clean the furnace vents, returns and ductwork including the dryer vent. Our daughter had recently used Brennan and recommended the company. I am very happy with the results. I felt the price was fair. They were pleasant and nice to have in our home. Two thumbs up!

Fixed the issue, and when something else went wrong a month later they fixed that with no additional charge. You can feel safe knowing that they're going to get to the bottom of everything and not overcharge you.

UPDATE: if I could give a lower rating I would. What an absolute JOKE of a company. They came to fix our system for the third time. They said they “got it working” but that it still wasn’t fixed correctly. We were told that they would be coming back out to fix it properly. It’s been TWO MONTHS SINCE THEN. Phone call after phone call and repeatedly being told management wasn’t available, empty promises of a return call, getting the run around, I am FED UP. We are filing a formal complaint with Costco against this company. I’m so done.

I don’t normally write reviews, but my husband and I are beyond frustrated with our experience and the system that was installed by Brennan. Decided to go through Costco, sales guy was great. Install seemed to go fine (installed in January), but now we are 2 months in and our heat stopped working TWICE in the first two weeks after install, and NOW our AC doesn’t work. I’m sorry…but a two month old, $17,000 system should NOT have problems. It’s not ok. And now we will have to be calling Brennan for a THIRD TIME, in a two month span, to have them come out and figure out why the heck our system is not working as it should… AGAIN. If I could go back and go with someone else, I would. I really think Costco should reconsider who they are contracting with, when it seems so many people are having issues with the systems they are installing. I’m genuinely pissed we spent so much money on this junk.

I want to be kind and respectful in my response, but I think a bad review is warranted. If businesses and home owners want to find a good heating and air company I would encourage them to look elsewhere. My experience with Brennan and Heating has not been pleasant. At first they charged our church about $700 to replace a thermostat. I thought that was over the top but I moved on. About 3 weeks ago our church parsonages furnace went out. They came to look at it and gave us a price to fix it. The price seemed reasonable so I agreed. It took them a while to get back with me. I found out later that a salesman from Brennan called one of our parishioners behind my back (I am the pastor of this church) and tried to get them to approve the sale of a new furnace, of which, we did not need or want. It’s been 3 weeks and they still not have fixed our furnace. The communication from Brennan has been nonexistent. I have had to call them for regularly for updates on parts that would arrive and when we will be out on the schedule. The last phone call was perhaps the most frustrating. I can forgive the time it is taking because it was the week of thanksgiving, but the lack of phone communication and updates is unacceptable from a professional company.

Brennan Heating & Air Conditioning provides excellent service and great quality work. Our tech, Andrew, came out today to do our annual service. He was very professional, kind, knowledgeable, thorough, and took the time to educate me and answer all my questions. His customer service was outstanding from start to finish!!

This company Van drivers are driving so recklessly. Happened so many time with me. They get out of the gas station on canyon rd and straight enter in road without stopping or looking around.
I attached the picture of there work truck that jumped front of my Semi truck on canyon rd and not speed up and start moving over 10mile per hour. I was on 40mile per hour speed
I have load 90,000lb gross wait. I press brake so hard to stopped my truck to avoid accident. And honk at him.
Soon i start back driving he still driving so slowly. Trying to change lane and pass him, he change lane front of me and start pressing brake. He did that next 5 mile canyon rd to pioneer. I called them and get no response. This stupid driver get so many people's life in danger.

They quickly addressed my need for a water heater replacement. Haul away and install took just 2 hours! Let them know of your Costco membership for a 10% cash rebate. Take an additional 2% when charging to a Costco Citi Card and another 2% with a Costco Executive Membership.

Service rip-off! I paid Brennan $199 for the annual maintenance on my gas furnace and heat pump. The tech was prompt and polite and got started right away. As he was wrapping up, he made 2 recommendations for preventive repairs. I usually pass on such things, but since I trusted the Brennan name, I accepted the additional $573 recommendation. The tech finished in less than 30 minutes, which seemed too fast for what he described. That prompted me to look up the parts online, and I found them available from Amazon for less than $100. I don't mind Brennan making a profit, but this was a total rip-off. They may be great on a new install, but watch your wallet on a service call.

Check the number of complaints they have with the BBB. According to their bid, their work was "Adding new switches and outlets in stair well, kitchen, customer location." They didn't replace the switch to the stair well and left the other outlets and switches just wired, with no actual outlets or switches! Some of them were also not put in the locations as shown in our drawings. Their contract also states "Pay Schedule: 50% To schedule - 40% Trim - 10% Final Inspection." We paid 50% to schedule, they didn't do the trim (which is to install the outlets and switches) and then they charged my credit card in full without my permission. Their total was $4,950 for 5 1/2 hours of work which is about $900 per hour. Their response to my complaint to the BBB was a flat out lie. They said they finished their work and that we refused to let the inspector in. We allowed the inspector in and they failed the final inspection because they weren't done. Now we have to hire another company to finish their work. Total waste of time. I'm sure they'll post a response to this review that will not be truthful but the fact is they didn't fulfill their contract.

Our experience from estimate to installation was outstanding! Their price and quality of installation was great deal. I highly recommend them for any Water Heater, AC, or Heating needs!

I had yearly preventive maintenance done on my heat pump, which Brennan had installed 2 years ago. The technician was professional and courteous. He asked me if I had questions and thoroughly answered them.

We were extremely disappointed with the project management and communication from Brennan when they installed our heat pump in July 2025. While the actual installation work was fine, the customer service experience was frustrating and unprofessional throughout. We had to chase down information repeatedly, with many of our messages going completely unanswered. I would not recommend Brennan if you value clear communication and professional project management. For a $20,000 project, the level of service was unacceptable.

We had our furnace replaced and ac installed on Wednesday the 27th. Worked fine for one day and completely stopped working by the 29th. I called multiple numbers multiple times and FINALLY got ahold of someone and they told me that the earliest they could send someone to look at it would be the following Monday! They said that was after they did some shifting around because if they didn’t it would have been weeks…. Completely unacceptable in my opinion! This company should be ashamed of themselves. It’s 100 degrees outside and it was becoming unsafe for our 16 month old child and 3 large dogs. My husband came across Hales. The operator was amazing bending over backwards to get us squeezed in with a tech. The tech was at our house within 20 mins, issue diagnosed in 5 and resolved the issues CAUSED by Brennan’s in 15!

I DO NOT RECOMMEND BRENNAN’S!
Sincerely an extremely dissatisfied veteran family.

Very good customer service. Work person was efficient, knowledgeable, and kind. Talked to my kid, was respectful of my pets. Did a good job explaining too.

The Brennan Heating and AC scheduling crew are always so friendly and helpful. Steve, the technician who inspected and serviced our heat pump was great. He was fast, knowledgeable, courteous and professional. He ensured that I was informed of the condition of our heat pump and provided us with options. Everyone from the Brennan team delivers exceptional customer service!

Brad and Brennan Heating etc saved the day after our furnace drain clogged creating a large wet area of carpet. They instructed us what to do and were out at our house almost immediately. Of the few problems it could have been his first guess was the one. He fixed the clog, added a water sensor for backed up water, and updated the tight pipes for easier access to address any future clogs. Fixed and Future-Proofed!

The service technician (Reginald) Was outstanding. He was efficient, on time, explained all the problems we are having, and solved our issues quickly. I cannot recommend him highly enough.

We hired Brennan for a panel/meter replacement and a whole home rewire (upgrade from knob n tube), which was bid at over $20,000. We chose this company because they had immediate openings to complete the job. The job was bid to take 4 days (similar timeframe as the other companies that we received bids from). It took them over 9 days to complete our job spanning over 1 month because they consistently overbooked their schedule and often sent only one technician. Then the main electrician informed me that the other electrician on our job was not qualified to do the work or wasn't performing the work to standard so they pulled him off our project.

Besides the time it took them to complete the job, they also did not clean up after they worked leaving dust/debris on carpets, floors, window ledges and all over our stuff in the basement. I asked them to use dropcloths, which they began doing but they shook out the cloths in my kitchen. There were large overcut holes in our walls, which they came back to patch after I sent pictures to their field supervisor. They also cut power to the outlet that powers our secondary refrigerator and spoiled over $500 worth of food.

The worst part of the experience was the horrible customer service I received from nearly everyone in their company. I called their L&I administrator, Jim H. We talked on the phone once where I explained my frustration over the amount of time it was taking and the lack of communication by the electricians on my job. He said he would talk with them and call me back but he never did even after I left messages for him.

After I threatened to contact BBB, I was contacted by their field supervisor, Joe H. He agreed to give me a 5% discount for all the issues we had with the under qualified electrician and how long it was taking to finish the job, as well as a $500 credit for the spoiled food. However, he has not returned any of my calls, texts or emails after I discovered they tacked on an additional $2000 above the bid price. Four months later, I am still waiting to get the final bill so I can pay the remainder, and finally be DONE with this company.

Worst customer service ever!!! I am telling everyone to avoid this company.

In regards to their reply to my review, they have absolutely not attempted to contact me to resolve any of my issues. I have phone logs and emails that show how many times I have contacted them with NO response. I did receive yet another bid on Dec 10th (which I already have multiple copies of) from their office staff after I left messages for Joe Harris yet he never returned my calls, texts or emails. I don't need any more bids folks! I need a final correct bill or invoice so I can pay you and be finished with your company!