Brennan Heating and Air Conditioning

Reviews

• EC

  EriJen Chandler

  Dec 27, 2025
  5.0
  HAD OUR FIRST MAINTNENANCE DONE ON OUR GENERAC GENERATOR AND IT WENT PERFECTLY. THE TECH TOOK HIA TIME AND DID A WONDERFUL JOB. HE WAS VERY POLITE & PROFESSIONAL. THE SERVICE WAS FREE BECAUSE OF A 2-YR FREE MAINTENANCE DEAL W/THE PURCHASE OF THE GENERATOR.
• MS

  Michael Steiner

  Dec 17, 2025
  1.0
  Three appointments had to be made from early September to mid December. After three appointments, the company got nothing done. My edit one day later: I phoned Evergreen Air Duct Cleaning Company when it appeared that I was getting nowhere with Brennan. The guys at Evergreen showed up the next day. Got the job done, arriving in a very similar van. No problems.
• KB

  Kelly Bryant

  Dec 16, 2025
  1.0
  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.
• VW

  Virginia Warren

  Dec 15, 2025
  5.0
  This is our second home that we have had Brennan heating and cooling do installation of a furnace and cooling system and hot water heater. The salesman was very knowledgeable and helpful in making our decision. The install team was very neat and clean, explained the new system workings very well.
• JM

  Jennifer Mertlich

  Dec 1, 2025
  1.0
  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.

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