I recently had a complete new central AC and heating system installed in my home in Fountain Valley, and the entire experience exceeded my expectations from start to finish. I obtained three estimates, and ultimately chose Evolution. I did not regret this choice. Jeff Kieffer came out the day after I called and provided an estimate and a proposed plan, and the owner, Diego Martinez, visited my house twice, once to explain how a difficult room would be accessed and serviced, and the day the work began to answer any final questions and give final directions to the installation team. The process was smooth and efficient: * The team arrived on time, were extremely courteous, and Diego, the owner, showed up and took the time to explain everything clearly one more time. * They handled the installation with care, keeping the work area clean throughout the day. No mess left behind--they even vacuumed up and wiped down areas they worked in. * The crew was knowledgeable, answered all my questions patiently, and made sure the new unit was perfectly sized for our home (no shortcuts or upselling) * They tested everything thoroughly before leaving, walked me through the operation of the new thermostat (Ecobee Premium), maintenance tips, and warranty details. It's only been a short time since the install, but the difference in comfort is night and day. Exceptional financing was offered, and the value of this project was perfect for my budget I also gained a new closet by moving the unit up to the attic! If you're in the Orange County area and need a new AC/heater system, I can't recommend this team highly enough. Professional, reliable, and genuinely focused on customer satisfaction. 5 stars all the way--thank you for making our home so much more comfortable! read more

See all

Final update: The company has now stated in writing that they will not send a technician and advised me to work with another HVAC company, despite acknowledging the issue may have fallen through the cracks. For context, during this period we had a newborn and significant personal obligations. When the visit occurred, the noise did not happen at that moment and no technician evaluation or adjustment was performed as a result. I later recorded the noise when it occurred and shared video evidence. Despite this, no diagnostic visit was offered. My review reflects both the unresolved issue and how it was ultimately handled. After posting this review, the business responded by disputing timelines and attributing the issue to unrelated work, but did not offer to inspect or resolve the ongoing airflow/pressure noise, despite video evidence. The attic cellulose work referenced was recommended by their team and performed by a contractor they referred. I had an air conditioning unit installed by Evolution Air in 2021. Since installation, the unit has intermittently made a loud "farting" or bubbling noise. I reported this issue within the first year. A technician came out, but unfortunately the noise did not occur during the visit, so nothing was adjusted or fixed. The problem has continued since then. After researching the issue myself, I found multiple discussions on Reddit indicating this is a known and common problem related to airflow or pressure adjustment, and that it is typically an easy fix for an experienced technician. Despite this, the issue remains unresolved years later. Overall, I'm disappointed that a known, recurring issue reported early on was not properly addressed, and that I've had to rely on online forums to understand what should have been a straightforward adjustment. I have recorded a video and sent it as well. read more

Evolution Heating And Air Conditioning - A text message conversation discussing HVAC service issues, with a customer review praising Jeff Kieffer from Evolution Heating and Air Conditioning. - Heating & Air Conditioning/HVAC Near Me - Fullerton, California

Evolution Heating and air will always be my go to. From the office staff to the salesmen to the techs. They are all friendly professional and have your best interest at heart. I will continue to recommend them over and over Services we have received- A/C system maintenance, Installation, Install thermostat, Install AC Today my tech was Ricky! He was great! He came out to chk out a roof leak that was dripping into our home above the heating unit. It was clearly not an issue with their products but Ricky went up to chk it out just im case and made sure all was gpod. Salesman was Jeff he worked with us and our budget to install a new AC unit in our manufactured home about a year ago. It works great. They even upgraded my home to touch thermostat I cant say enough about the staff at Evolution. Check them out! You won't regret it read more

Extremely responsive and professional. They made the process so easy to schedule an appointment. I liked the follow up reminders and letting me know the day of when the tech was on his way. Unfortunately our current system is not working anytime we use the upstairs heater. We had contacted Evolution and Air since our original installer had retired and was having health issues. Anyhow Ricky came as our tech. He was professional, considerate of our home, and after evaluating the issue took his time to explain what was wrong with it. (Manufacture overheating issues because of zoning configuration). Anyhow I appreciated that this was not a rush evaluation and even after the service when I had questions Evolution was responsive. I would highly recommend them for any heating and air issues you may have. read more

I called on Friday February 20th and by Monday the 23rd Ramiro and Andrew came and installed my brand new furnace. My manufactured home is 50 years old and so was my old furnace , so these two gentlemen had a lot of adjustments to do in order to get the new furnace in the same area where the old furnace was. They did a beyond an amazing job. They were professional, patient and creative. Jeffrey the owner did everything in his power to make the purchase happen. Thank you everyone and also thank you Rose you all were so kind and helpful we love our furnace and we love our thermostat! read more

Evolution Heating And Air Conditioning - Heating & Air Conditioning/HVAC Near Me - Fullerton, California

Our system finally gave out after 41 years! I researched different Heating and A/C brands then HVAC installation and replacement companies. I chose Evolution Heating and A/C because of the brand, pricing and reviews. Brian came out inspected our old system, ducts and home, explained the system American Standard Heating and A/C system and recommend the unit suited for our home configuration. Brian provided us with an estimate and proposal few days later, we set up an installation date. Three days later Evolution's installation team arrived at 8am, Tim, Luis, Salvador removed our old system replaced our ducting, while in our house they placed tarps to protect our carpet and tile wearing shoes bootie they are very professional, what a great team! Job completed 3pm. Thank you Evolution Team! David & Margaret read more

What can I say I loved the work they brought to my home Jeff is a very funny guy and the rest of the team is awesome I'm now chillin on my new AC on these hot days i definitely recommend Evolution read more

Called up a couple HVAC companies to replace HVAC system at my brother's house. I wanted a good company and Evolution Heating had all 5 star reviews. The job went so well, I immediately booked Evolution Heating to replace the HVAC system at my house. I can see why they receive 5 star reviews for their service. Their crew are super professional, friendly, and completed what I thought was a 2 day job, in 1 day. My home never had AC and they had to run a new installation for both of my new systems, and got it all done in one day. Jeff's a straight shooter and helpful, Diego is super cool and will walk through with you to make sure everything's mapped out for the installation. I was the most impressed with the fact that I had a broken attic stairs that weren't safe to walk up. I offhandedly asked Diego if they've ever replaced attic stairs. He said they didn't, but he'd be willing to do it for me. Honestly, that was one of the things I was the most impressed with. They went out of their way to fix a problem that I think they normally wouldn't have to. And the new stairs looked AMAZING!!! Highly recommend Evolution Heating and Air Conditioning. read more

I love these guys. The quality and of service is nothing short of outstanding. Just had a dehumidifier installed, and while there was some initial difficulty getting it exactly the way I wanted, they never waivered in getting it right. They acted promptly, and always with a smile. Highly recommend, read more

My gas wall heater needed to be replaced and I called 4 different companies and decided to go with Evolution Heating. From the minute that our sales rep stepped in my home with his shoe covers until the install crew did their final clean up before leaving they were friendly, fast and knowledgeable! We accepted the quote on a Tuesday evening and before you know it they scheduled the install the next day at 8:00am and finished before lunchtime! Thank you so much Evolution for making our home warm and cozy again! read more

I recently had an issue with my heater and reached out to Evolution Heating and Air Conditioning. From the start, their responsiveness stood out.They scheduled a service visit for the very next day. Tim arrived on time and was courteous, professional and knowledgeable. He took the time to thoroughly diagnose the issue and went the extra mile to try and fix it during that visit. When the same issue came up again the following day, I contacted the company and they responded immediately. They sent Tim back out promptly, and this time he was able to fully resolve the problem.Thank you, Tim. Overall, I'm very impressed with their quick response, efficiency, and commitment to getting the job done right. It's refreshing to work with a company that is both honest and reliable. This will definitely be my go-to company for any future heating or AC needs. I highly recommend them. read more

We got our furnace replaced by Evolution Heater and Air Conditioning. They had the best price out of five bids. Furnace has been working great, and the price also included a new bluetooth Honeywell thermostat. I've been able to turn the furnace on and off through my phone. A few weeks in of having it, the furnace had a loud whistle noise. I contacted Brian and he got me in touch with the staff. They were able to come out the same day to adjust it, and there has been no whistle noise since. I really appreciate them coming out so quickly. read more

Sean recommended Evolution through Facebook and got me in touch with Jeff! Everything about my experience was great! Jeff helped come up with the right equipment to fit our needs. The installation crew (lead by Ramiro, with Edwin and Jose) were awesome! They came on time, were friendly, polite and very diligent with their work, including all clean-up. Thank you for everything! I look forward to referring Evolution in the future! read more

I had an amazing experience with Evolution. From the moment I scheduled an appointment, the staff was friendly, responsive, and professional. Brian arrived right on time and diagnosed my AC issues. What really stood out was Brian's expertise and honesty--no upselling, just straightforward honest advice. Brian explained everything with clear and easy to understand information. Edgar and his crew installed everything in a very timely manner and left the area clean and tidy when they were done. He even installed an additional vent at no additional charge! Amazing service! It's rare to find a company that combines expertise, great customer service, and fair pricing, but Evolution nailed it! Highly recommend them for all your HVAC needs! read more

Evolution Heating And Air Conditioning - 3 ton American Standard Silver AC compressor - A gray American Standard outdoor air conditioning unit is positioned on a concrete pad next to a building wall with a window, connected to electrical wiring. - Heating & Air Conditioning/HVAC Near Me - Fullerton, California

Everything went smoothly and we couldn't be happier. I interviewed 5 different companies and Brian at Evolution was the last guy I met. He was very knowledgeable and communicative and answered all my questions. I also got a fair quote. Sal, Andrew, and crew showed up today and replaced the whole HVAC system in a day! Thank you for all your hard work. J. read more

From the first quote/consult appointment to the permit received in the mail, Evolution staff were super attentive and communicating every step to the process. We were in need of a new furnace before the winter season truly got into full swing. We got a couple of other quotes and Evolution was our best option! They arrived promptly on a Saturday at 8am and finished the job right before 4pm. The crew of 3 guys were super respectful of our home and did great work, down to the clean up after. Rose, the point of contact, was always responsive when we had questions about the permit or next steps. We had to relocate a duct in one of the bedrooms so they sent out a guy to drywall the hole and paint the ceiling. It was seamless and turned out great. Thank you for the amazing service and job done Evolution team! read more

Evolution Heating And Air Conditioning - The workers were so patient with our kids wanting to watch/ask questions - Heating & Air Conditioning/HVAC Near Me - Fullerton, California

Evolution Heating & Air installed all of my mini split air-conditioning and has been great for service. I highly recommend this company.

Evolution Heating and Air Conditioning was incredibly reliable. They arrived on time, communicated clearly about the work, and were professional throughout. We initially met with Brian who was super friendly and informative. Tim and Luis did the install, they were quick, clean, efficient, and lovely to work with. Behind the scenes Rose helped us along every step of the way! I highly recommend Evolution Heating and Air Conditioning to anybody looking to have air conditioning installed by a great team who really care about their customers! read more

We had the best experience with this company from start to finish. Initially we needed an asbestos abatement and new ductwork. That's when I first met Brian who is very knowledgeable in the HVAC world and I learned a whole lot about how all the HVAC stuff works. I then spoke to Rose, who handled all the scheduling and made this process as easy as possible. She scheduled the abatement first thing on Monday then they were able to install the new ductwork the very next day. We also did a service call, which they didn't charge us for, because our AC wasn't blowing cold. We found out our 19 year old condenser finally gave out. The owner, Diego, came out the very next morning to install a new unit and had us up and running in 2 hours. Also a huge shoutout to Sal and Andrew who installed our ductwork, and Eddie, the service tech who hooked us up with the new unit. I must say, this company's pricing is very competitive compared to others. I got multiple bids and they came out at a very good price compared to others. I would highly recommend this company to anyone who needs HVAC work. read more

Evolution Heating and Air Conditioning is absolutely outstanding in every aspect of doing business. My new furnace looks and works perfect.

You can totally tell they care for their clients and are honest people and don't try to sell unnecessary products. Brian and his team took care of my family and I, we are very happy with are central A/C. I would recommend this company over other companies. read more

Evolution continues to impress! Shortly after installation of our air conditioner we had a few user error questions. Both Rose and Brian stayed on the phone with me after hours to help run diagnostics and fix the issues. Brian even made a trip to the property to adjust our dampers for us when no technicians were available during a heat wave. Most recently, I was concerned we might have a refrigerant leak in our heat system. I messaged Rose on Yelp around 10pm at night expressing my concern. By 8:30am that next morning a technician had arrived at our house to check things out. Fortunately, there were no issues. Having them respond so quickly to check things out and give us a peace of mind was huge. We have a 3 week old baby, so getting that confirmation that everything was okay was particularly comforting. There is no other company I would use! Evolution is the best out there! read more

Our older AC unit quit working late Monday night in late October. After seeing many positive reviews on Yelp for Evolution Heating And Air Conditioning, we called them at 10:30 Tuesday morning. They gathered our information and said a technician would be out with a Noon-2:00 window. He actually arrived before 11:45 to check things out. The communication was excellent, with text messages being sent to us from the home office as well as the technician. He also called when he was on his way, and the text messages included a tracker to show the GPS location of the technician as he was traveling. He arrived and took the proper time to diagnose our unit. We were informed that our 21 year old condenser had major voltage issues. We knew this day was coming based on past service calls in recent years from another company. There was no hard sell, but upon my suggestion, I was contacted by Jeff at Evolution, and by 1:45 PM we were meeting at the house to discuss new installation options. It was determined that our heat furnace was still in excellent condition, so we focused on a new AC condenser unit package. Jeff was very knowledgeable, informative, and an excellent communicator. He offered a nice discount, which was a very good value for what we needed, and we set up the installation for the next day. The crew arrived Wednesday morning before 8:00. They communicated well, were polite and efficient during the installation project, They laid tarps to keep things clean, and they were very careful bringing parts and equipment in and out of the house. They tested everything thoroughly and went over it with us to answer any questions and make sure we were satisfied. The communication level from Evolution with text messages, emails and phone calls was excellent throughout the whole process. We will use Evolution for all of our heating and air conditioning needs going forward! read more

Evolution Heating And Air Conditioning - Condenser installation in process - A central air conditioning unit is installed outside a building, with tools and wires connected for maintenance or repair. - Heating & Air Conditioning/HVAC Near Me - Fullerton, California

I am very pleased with evolution. We had our ducts redone, replaced our central AC unit, and added 2 mini splits. Brian was able to give us a good discounted rate since we had so many things replaced. The workers were very clean, efficient, and quick. Our house is now very very cool and we can cool down all or just certain bedrooms for our custom needs. Scheduling was simple and fast. Edgar led the team and went over placement of units and instructions on useage before they left. Excellent! read more

Excellent value. They fix what they can, they don't price gouge and do excellent work. They are on time and even called when I had an emergency and rushed to help us. I will always call them for any heating or air conditioning needs. read more

Evolution replaced our furnace and added A/C to our home. Brian provided fair accurate quotes and was extremely helpful in the process of deciding what equipment to use. The quote provided was extremely competitive. Aram and his team installed within a week of finalizing. They were professional, cleaned up after and did a great job. Would definitely recommend Evolution. read more

Evolution Heating And Air Conditioning - New American Standard Furnace - Heating & Air Conditioning/HVAC Near Me - Fullerton, California

Evolution contacted me because it had been a year since they installed my system. They offered a complimentary maintenance tune up! Tim did a great job and even warned me if I noticed any leaking in the drains to call them immediately. I didn't even know it had a drain. So thank you for excellent service Evolution!! read more

We received 3 different quotes. Brian at Evolution gave an honest quote and made sure we were satisfied when we were comparing apples to apples. The team arrived on time and completed the entire project in one day. This included moving the furnace/air handler from the first floor into the upstairs attic, replacing all duct work and installing a new American Standard 5 ton system. Tim, Sal, Luis and Diego were professional and went beyond to make sure all areas were well protected, floors were covered and left our home cleaner than when they started! They created an intake vent in the upstairs hallway to allow for easy access to replace the filter. They also provided a new pad for the condenser. The new system is so quiet compared to our old Lennox. Can't wait to really try it out this summer when it's blazing hot outside. We totally recommend Evolution from start to finish. read more

See all

Evolution Heating and Air went above my expectations! From the initial conversation with Rose on Yelp to schedule our free consultation for HVAC replacement, including replacing all our ducts,to Brian coming out for the consultation and finally to the technicians that came to do the installation, everything was prompt and professional! Rose was extremely responsive to all my inquiries and patient to my back and forth exchanges. Brian was extremely knowledgeable and took the time to explain to us he different options we had. More importantly, he was prompt and on time for the consultation, compared to other vendors we've experienced. Finally, the three technicians that came to do the install were right on time, was very organized and respectful of our home, and professional with the whole process. They were as efficient as possible and did an amazing job cleaning up everything. Their pricing was very competitive and well worth the service we received in return! read more

We had a wonderful experience with Evolution Heating and Air Conditioning, as they will be servicing HVAC annual. In particular, we really like their technician, Tony Higuera. Professional, knowledgeable, accommodating and a pleasure to talk and work with. They are very blessed to have him on their team. I also had a wonderful time interacting with Rose, who was helping me with our consideration for purchasing a new HVAC system. Although we did not purchase a new system, she was an absolutely pleasure to work with. read more

Tim was friendly. Told me the issue. Didn't attempt to diagnose where the leak was, however. Problem I had was the price to refill R22 refrigerant was far more than what the Internet price range showed. I just paid him the $88 for coming here and found someone else to refill. Maybe he quoted me high refill price thinking I'd desperate enough to change my AC unit. read more

What can I say that hasn't been said about this company. I sent a message via Yelp and someone responded right away. I called the day before to confirm and it the message was from a real person and not an automated robot. Tim was our tech. He was very friendly, kind and understanding. I explained to him that we hired another company that stated we needed a new AC unit for $13,000 and that we didn't have that kind of money. Tim listened and told me he would do his best to help us. Great news!! Our AC unit is running great. The coils are clean and everything looks great. He checked our thermostat and told us that everything was up and running like it should. Thank goodness for honest people and this company. We found a new company to maintain our AC unit from here on out. read more

I would recommend Evolution Heating and Air. They have a great price for a new heater. My heater was over 30 years old. I got three quotes and Evolution Heating had the best price and good reviews. The staff are very friendly read more

Evolution Heating And Air Conditioning - Heater - A black furnace unit is installed in a small closet with metallic insulation panels on the walls, connected to yellow and black pipes. - Heating & Air Conditioning/HVAC Near Me - Fullerton, California

We recently hired Evolution to install a mini split unit in a bedroom for extra cooling at night. We wanted Mitsubishi due to the low noise level and Evolution quoted a competitive price. Diego was our estimator. He provided excellent advice, including steering us away from installing a condensate pump as suggested by another company. Rose in the office was super responsive and allowed us to listen to an operating unit so we could be sure about the noise level before making a final decision. Installation went smoothly and the team left the area very clean. The system works great and is super quiet. We would rate the overall experience with Evolution as exceptional. Thank you. read more

We have had a great experience with Evolution. I initially called them in 2023 for an HVAC replacement, and received a quote, along with quotes from several other companies. Evolution was my top rated quote based on price, responsiveness, and knowledge. We ended up deciding to hold off for another year if our old system would make it, but I called them back in February 2025. I scheduled another consultation appointment, and was contacted immediately with friendly, excellent service by Rose. Brian came over the same day and was the same sales person who visited us in 2023. That tells me that this company treats employees well and they stay. Brian is straight forward and I essentially got the same quote plus some additional work I added on. Install was scheduled ASAP, and I got a consistent amount of reminder texts for when the technicians would arrive. The technicians Eddie, Ramon, and crew were great! They arrived a few minutes early and were very efficient with removing the old system and installing the new one. They cleaned up everything and explained the entire new system and all the start up information. Looking forward to having a reliable and cost efficient system this year. Great job, Evolution! read more

Brian did a great job explaining HVAC specifications. Crew was on time polite and knowledgeable. Highly recommend to a homeowner! read more

Evolution Heating And Air Conditioning - Furnace and A/C. - Heating & Air Conditioning/HVAC Near Me - Fullerton, California

See all

Slow to no response. Contacted them on a Monday. On Tuesday they said they were available on a Thursday then never heard from again. read more

See all

I was in need of Air Duct replacement as a result of a rodent problem from a couple of years ago. After assuring that all the entry points had been sealed I contacted several HVAC companies to get estimates on replacing the air ducts. I had several estimates, but I wasn't comfortable with the pricing as they all seemed very expensive compared to the cost of the entire system being installed several years earlier, (this is a 2000 sq ft home). I couldn't believe the price would have gone up that significantly. My final call was to Evolution Heating and Air Conditioning. I had read several of their fantastic reviews and was pleased to find that they were local to my residence. Brian came out and evaluated the attic and gave me a price that was less than half of the other two I had received. I was a bit skeptical, but he explained they are a small family owned business with little overhead (unlike the other companies), and combined with the great reviews I had read, I agreed to use them. They showed up around 8am and Edgar and Andres were completely finished within 4 hours. They removed all the previous ducting, installed the new ducting (and strapped them to the rafters, unlike the original installers), then cleaned up all the debris. They even installed deflectors so the air flows more evenly throughout the house allowing it to be more evenly cooled. I couldn't be happier with their cost, service, and professionalism. Thank you Evolution Heating and Air Conditioning! read more

I cannot say enough good things about Evolution Heating and Air Conditioning! From everyone in the office who took my call to scheduling the appointment to handling the contract, to the technician who came out to provide the estimate and the techs who installed the new AC unit, everyone was friendly, professional, knowledgeable and efficient!! Removing an old AC/heating unit and installing a new one, is complicated process, but they made it look effortless. They never waisted a minute getting the job done, and seemed to enjoy doing a good job. That's a rare thing. They worked clean: not a drop of trash was left when the job was done, and my home was left just as it was before they arrived. If I hadn't seen it with my own eyes I would have never known they had been there . . . except for the addition of a brand new Heating and AC unit! Honestly it was probably the smoothest, most hassle-free project I've ever done in my condo. From the start (my first contact via Yelp) to the finished installation and a gloriously cooled home, was only 5 days. Needless to say, but I will, I highly recommend Evolution Heating and AC!! read more

Evolution Heating And Air Conditioning - New heating and AC unit installed by Evolution Heating and Air Conditioning - A heating system with ductwork is installed in a small utility closet, featuring metallic pipes, an HVAC unit, and insulation on the walls. - Heating & Air Conditioning/HVAC Near Me - Fullerton, California

I recently had Evolution replace my AC unit, furnace, and ducting. Their service was excellent from the on-site quote to the completion of the job. I got quotes from five different HVAC companies, and Evolution offered the best value in terms of both product quality and service. They completed the entire project in just two days, and the new system runs great. I'm very happy with their work and highly recommend them. read more