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.

Since A1 upgraded my insulation, converted me to a heat pump and now manages my maintenance plan,…read moreall of their services have been wonderful. They've proactively let me know if parts needed to be replaced. All the technicians, like Roy who was here yesterday for my regular maintenance visit, are incredibly competent, efficient and gracious. Thanks also to Jessica who helped me with scheduling. I feel very well taken care of. Unreserved recommendation.

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

Mark answered my call after hours and set an appointment for the next day. Vallejo was in the…read moremidst of a raging heat wave when our A/C went out and a lot of contractors were booking a week out or wouldn't even return my call. Mark showed up on time and had the correct replacement capacitor on his truck. He charged less than 100 for the job including the part. Very fair. A1 quoted 462 for the same job.

Miller's was recommended through mutual friends. I was concerned about the distance involved, as I…read moream in the Sacramento area and they are located in Vallejo. When I called to book the appointment, they let me know that they do service and installation in the Sacramento Valley, as well as, the greater bay area. On the day of my appointment, two of their employees arrived at my home at the agreed time of the appointment. I had been doing some of my own research on equipment and asked many questions as they where doing the inspection of my equipment. Miller's employees took the time to answer my questions and share their thoughts on the condition of my equipment with me. Based on the age and condition of my equipment and the regulations in regard to certain refrigerants being phased out, I decided that my best option was to install a new system, as opposed to trying to repair a unit that was no longer in compliance. My new system is whisper quiet, I can't hear it when it is running from inside my home. I am very pleased with this company.

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.

When you are able to find service, that is such high quality at a reasonable price, I feel…read moreobligated to share the wealth. Marc from Comfort Air was everything I look for, when I hire an outside service. Thorough communication, efficient, knowledgeable, courteous, clean, honest and professional -- VERY difficult to find in Vallejo in my experience. How is it possible there's only 3 (now 4) reviews on Yelp? The fact that all of this comes with a very reasonable price tag, just seals the deal for me. My brand new dryer was taking 4-5 cycles to dry a load of laundry, after Marc cleaned the vents from the inside of the house, as well as from the roof, my dryer is now humming and such a pleasure to use! Not only did he clean it from both ends, but he also went through the attic to repair a door on the vent that was incorrectly installed. His price and service was so good, I'm just looking for things for him to fix now... lol. If you are having issues of any kind with your appliances, you don't need to look around any further, I've done the research for you! I highly recommend Marc at Comfort Air.

When you want to know you HVAC needs are secure and being met by the most professional team call…read moreComfort Air. Paul Votto and his team are the best in the valley. Reliable, honest and very fair. I switched from one other company to Comfort Air and boy am I glad I did. Recently Ed, a Sr tech came and thoroughly fixed a major problem and Paul made sure every detail was perfect. I cannot thank the Comfort Air Team enough for all their hard work. David B

I had a broken main. Excellent communication and troubleshooting over the phone. They arrived on…read moretime and finished the job within the quoted price. Great people and very professional! Will be contacting them again for any future plumbing issues.

Bad bathroom and kitchen sink clogs that I couldn't unclog. And I tried everything I found on…read moregoogle and YouTube videos and shorts. Taqee and company came and unclogged both in a quick and professional manner. No more headache for me. Highly recommend. Down to earth dudes as well.

I had great experience with Jeff, Francisco and the team! My 40 year old AC broke one day in this…read morehot summer and New Age is the first active responder to my request on Yelp! Jeff came and examined the AC very carefully, suggested possible solutions and waited for my decision patiently without pushing. Jeff and team catered to my changing schedules and installed my new AC as soon as possible - saving my life in this crazy heat! Besides, they also cleaned all ducts and the furnace closet, making everything brand new! I'm really satisfied with the new AC and the fresh air! I know the price is crazy now, but Jeff is able to get a fair price for me and get everything settled perfectly! Thank you Jeff and team for being so professional and flexible! Recommend New Age to everyone!

I rarely leave reviews, but this experience deserves one. I recently had a mini split system…read moreinstalled by New Age and I couldn't be happier. Jeff was knowledgeable and polite and took the time to answer all my questions. The team was professional, efficient, and respectful of my home. They laid down tarps, wore shoe coverings and left the area clean and tidy. I appreciated being included in the aesthetic decisions, like the placement of ductwork. Great job!!!

Called in the morning and left a message. Got a text from Thomas who said he had time in the…read moreafternoon, same day, to come by and take a look at my oven. He said he'd be here between 4-6pm and showed up at 3:45pm. He came in and diagnosed the problem, which all made sense, made the repair and even fixed a light that was not working. He did a great job and it only took about 30 minutes. Very nice and very knowledgeable about all things appliances. I'd highly recommend him!!

I am completely blown away with the quick and professional service from Thomas! On my way home from…read morework, I received a call from my hubby of those dreaded words on a 100 degree day.. "the AC went out.." I drove home pretty much in tears, preparing for the worst.. either several days and nights of being super uncomfortable to be blasted with a huge repair bill or the news of the need of a whole new unit. Quite the opposite to my surprise. Thomas arrived at our home in less than an hour of our service call, quickly diagnosed the problem, had parts on hand, and within 15 minutes, we were cooling the house again. No joke, no run around, no sales pitch, no highway robbery. Just a true expert providing the service we needed to get us going. The cost? So insanely reasonable in my opinion. We will for SURE be a returning customer with several appliances issues we've gathered and not fixed along the years. Thank you for helping restore our faith in getting the problem fixed, with a smile and sense of urgency, with no unnecessary charges or taking advantage of the customer. A++++++.