After 25 years, my Concord home needed a full HVAC replacement. I did my homework -- four quotes,…read moreverified equipment certifications, asked hard questions about duct sealing, zoning, and equipment sizing before deciding. A-1 answered every question confidently, corrected a spec error in their own quote when I caught it, and put everything in writing before I signed. Install day: Austin, Joey, and Edgar showed up on time. Floors covered, shoes covered, house treated well. Two days -- day one removal and new equipment, day two ductwork and zoning. Heating and cooling tested before they left. Full documentation handed over on the spot. No hidden charges, no surprises, no change orders. Price was mid-range among four quotes, but the warranty structure -- lifetime workmanship, no-lemon guarantee, payment at completion -- made it the best overall package. Still have HERS test-out and city inspection scheduled, but based on every step of this process I'd recommend A-1 without hesitation. Austin, Joey, and Edgar did a great job.

From start to finish, my interactions with A-1 heating were excellent. Polite, professional…read moreemployees who did a great job. I'm very happy with their work and would recommend this company to anyone needing their services. Phillip, in the office, was very helpful. Jake and Joe, the installers, were on time, neat, organized and knowledgeable. Good crew.

Angela came out to service AC unit and she was AMAZING. Not only did she have GREAT customer…read moreservice, she was personable, professional, and very knowledgeable. She explained things to where we understood it and when we had we had questions she answered them perfectly. I recommend this company!

Incredibly rude customer service. They actually hung up on me, even though I was calmly explaining…read morethat the service they provided hadn't been fixed. Strongly recommend NOT working with these people.. incredibly rude, didn't fix the problem, and will likely hangup on you... There are plenty of other businesses that will not waist your money or your time.

From the first point of contact to when they pulled away. Golden State Comfort Systems made my…read morefamily and I feel like we mattered. While we requested estimates from multiple providers, we found Golden State to be the most comprehensive estimate. They even kept us from overdoing our system! Another company attempted to upset us on a massive unit. So glad we steered clear. Greag saved us money, and kept us cool! Thanks again Greg! You guys are great!!!

I'm happy with the service they provided. The guys were very professional and honest . I will…read morecontinue to use them when needed in the future.

Literally knew something was wrong when I turned on the AC and the thermostat kept going in the…read morewrong direction:/ had to call someone asap as I had family over too. Symon was referred by my realtor and was able to squeeze me in the next day!!! Figured out the problem, gave me some pointers on maintaining the unit, super nice guy, and now the family is not suffering in this heat wave!

Symond came out three days after my AC went out. On time ,…read morepolite ,well spoken I can't recommend another company more than symond and his family. He had to replace the Capacitor . Didn't try to upsell me on anything he showed me what the problem was and fixed. It don't call any other company But MARASIGAN HEATING & AIR thanks again Marc

Rendon Heating & Air Let me start by saying, we are 100%…read moresatisfied with the quality of the work, the friendliness of the owner & staff and the quickness the work was able to be completed.The owner David was able to come out, assess the issue with our AC unit and furnace, quickly get us a quote (that was more than reasonable) and get the new unit installed within 2 days. Incredible. Julian & Brendan, their technicians were knowledgeable and really gracious and friendly. I wouldn't hesitate to recommend them and would absolutely use them again if the need arises.

As much as I'd love to support a local business, I would suggest everyone stay away from this…read morecompany. Let me start by sharing our experience. We bought a new home sometime around October 2025 and have a homeowner warranty. When we had an issue with our heater, we contacted the warranty company, and they sent Rendon Heating & Air to our home. Rendon assessed the unit and told us it could not be repaired and needed to be replaced, which our home warranty covered. Rendon came back and installed the new unit. While it seemed like it was working at first, it clearly was not. We were told everything was working properly, and since we are obviously not the subject matter experts, we trusted them. However, we continued to have a strong feeling that something was wrong with the heater. This is a gas heater, and every time we turned it on, instead of starting normally, there was a loud **PUFF** sound that literally sounded like the gas was about to explode. On top of that, it would take forever for the heat to come through, sometimes running for 20 minutes without properly heating the house, and we could smell gas. We contacted the warranty company again, explained the issue, and they sent Rendon back out. We explained everything to the technician. Their answer? The unit was working fine and the PUFF sound was "normal" when the heater starts. Ummm... okay. So we asked, is it also normal for the heater to run for 20 minutes without properly heating the house while we can smell gas? Their quick answer was that we needed to replace the entire unit with **their machine** and move away from the manufacturer's machine. Keep in mind, this was a NEW unit that THEY had just installed. Months passed, and we still had no real resolution. At that point, we decided to bypass the warranty company completely because we did not want them sending Rendon back to our house again. We paid out of pocket and contacted two other heating companies for independent assessments because we wanted multiple second opinions. Sure enough, both companies raised concerns. We were told that the gas line/pipe could be malfunctioning or improperly installed because a gas heater should NOT start with that type of PUFF sound. They also identified concerns with the air and gas flow and told us the installation could create a serious safety hazard. Based on what we were told, we decided to have the gas shut off and not use the heater until the issue is properly resolved. This is the part that makes me angry. We repeatedly told Rendon what was happening, including the puffing sound, lack of heat, and smell of gas, yet we were told everything was "normal." Instead of taking our concerns seriously and thoroughly investigating the problem, their solution was to tell us to replace a practically new unit with another unit from them. And the customer service experience did not make things any better. The lady I spoke with constantly talked over me, would not let me finish explaining the situation, and repeatedly questioned our concerns. She even questioned why we had waited this long to check the heater and why we weren't using it. OMG... why would I turn on the damn heater when it was 80+ degrees outside? And when we did turn it on to test it, we repeatedly reported the same problem and were repeatedly told there was nothing wrong with the unit. The entire experience has been absolutely ridiculous. More importantly, when a customer reports a potential gas issue, it should be taken seriously. We trusted Rendon because they were supposed to be the professionals. After this experience, I personally would not trust them to work on our home again.

Great company!!! Kyle who is the owner and the primary HVAC…read moreexpert was great from the initial meeting up to the end of installation. Price FAR beats the competition giving the best HVAC - Trane brand. I definitely recommend Brisk Heating & Air to anybody needing HVAC installation and repair.

If you ever need HVAC Services, Repairs, or Replacement, do yourself a Big Favor and call Brisk…read moreHeating and Air! Well worth your time and money to ask for their help and expertise. I had the opportunity to use them for some issues at my home. Before I called Brisk, I had called another local company and had the worst possible experience a consumer can have. Lesson learned. BS diagnostics, poor service, and simply tried to rip off a consumer. Tech recommendations were a full system replacement with not clear explanation of why it needed to be replaced. I sent an inquiry to Brisk and shortly received a reply. Appointment booked. Had the pleasure of meeting Kyle who owns the company. Expressed my concerns and issues. Kyle listened and addressed all of them. Did the diagnostics and explained what was going on and what needed to be corrected. He explained what he was doing and what the numbers meant on his gauges. I could not have asked for a better experience with Kyle and his company. Kyle's knowledge in his field is top notch. The world needs more people like him! In the end, Kyle replaced a part. Checked to make sure the system was function within operational parameters. All was good. Nice cool air, quiet AC unit, and a happy customer. Best part is Kyle explained everything and there was no BS. The charge was fair for industry standards. It would not have mattered because if it were more I would have paid it. Simply because Kyle is a true professional! So if you made it this far, call Brisk Heating and Air. You will not be disappointed. They a have client for life and will be the place I call for future HVAC services in my homes. A Big Thank You to Kyle and Brisk Heating and Air!

Great speedy response Fareeed from HVAC Masters is the best. Friendly, reliable, and efficient.read more

We had a new unit installed at our old house years ago by Fred. They did a phenomenal job then…read more However this review is from today. I texted Fred yesterday, on a Saturday, because our unit in our new house (Not the one he installed) was having some issues. He came out on a Sunday and fixed it in 30 minutes, and DIDN"T charge us. I am not saying that will always happen, but Fred is stand up guy who stands by his work. Solid guy, he deserves all your HVAC business.

Quick response! Had an issue a week later, but they came out…read moreand fixed it. No hassle. Thank you!

I called for an estimate for a complete 2 new heat pump systems for my home. They arrived and…read moreinstead of looking at the systems they made a quote for 10k per system. They then wanted to see my machines to confirm. I left them alone with the system downstairs that was operating perfectly and then the next day it was out of refrigerate. They SABOTAGED my unit and then gave me a written quote for 22k.. My father while I was growing up was a handyman and I heard stories second hand from clients about overcharging and sabotaging peoples property to generate unnecessary repairs. This is a outfit of thieves and bandits! They will steal from you and damage your property. This company gives guy's like my father a bad name. Mark my words that after the next construction slow down this company will no longer be in business. Thieves and VANDALS!