Heating & Air Conditioning / HVAC near Diamond Bar

“If you need HVAC work of any kind, Bryan Heer of McMaster Mechanical is your guy! In 2022 he installed a new Bosch heat pump heating and cooling system in our house. We had 5 companies give estimates and recommendations. All of the other 4 used "rules of thumb" to "calculate" the size system we needed, and all of them were wrong. All of the other 4 tried to get us to move the location of the air handler to our attic, which is very difficult to access to change air filters, because the installation was easier for them. Bryan figured out how to install the Bosch air handler in the existing location, and even figured out how to increase the amount of return air for the system without any construction, which all of the others said was not possible without a lot of demolition. Bryan also took the time to actually calculate our heating and cooling load, and reduced the size of our compressor by one ton--saving us money and making the system more energy efficient. Both the city inspector and the efficiency tester said "wow" when they saw the quality of Bryan's work. We had a condensation link from a defective line (not Bryan's fault). He came out and fixed it. We offered to pay and he declined saying it was under warranty. We are impressed with Bryan and McMaster Mechanical and strongly recommend this company.“

“Fenco just installed the Lamborghini of air conditioning Carrier 5 ton and 4 ton variable speed. And I love it! Kamal is very thoughtful thorough and meticulous. Fenco will take very good care of you.“

“Great customer service from booking the appointment to the technician (Allan) who showed up. Allan was extremely knowledgeable and professional. Definitely recommend this company for all your air conditioning needs!!!“

“Abraham and Angel did a great job. They were quick, clean, and professional. This is my second whole house fan from J Martin and should I move again, I’ll be back for more.“

“Fast. Professional. Reasonable price as well. Found them on NextDoor posting from another customer.“

“Haven has been my go-to HVAC service for years and for good reason. Cody here, was in and out of my condo in record time, and fixed every issue I had. I'd give anything for a dozen more contractors like him“

“In and out. Professional, knowledgeable, affordable, oh, and great product (whole house fan).“

“Everyone was so nice and friendly. They were prompt on time got out the same day Cleaned everything up after they left was perfect“

“I have been very pleased with the customer service provided by Evolution HVAC service. They installed both the central heating and air in my home and a ventless system for my garage. They responded quickly with any HVAC issues. Highly recommend“

“This company was fantastic! Their pricing was competitive and the service was friendly and really great! I highly recommend Accurate Air!“

“Alexander was Super Professional and Did a Fantastic job, I would Say Titan Air is The Best HVAC Company We Have Ever Used.?“

“We highly recommend Albert Air. Our 23 yr old a/c compressor was ready to be replaced. Nick is co-owner with his father and his experience really shows. He evaluated our need, then presented us with several options and gave us the time we needed to further research and decide. Once we made our decision we were scheduled and financing was arranged. His team arrived on time and work was completed in one day. We would definitely work with Albert Air again!“

“As always, Jim was on time, courteous, and professional. The problem was repaired and explained. The office personnel were prompt and efficient in their follow up and kept me posted of technician’s ETA. Comfort Zone has my highest regard for their services, technical and customer.“

“Joseph was very helpful and thorough with the diagnostic process. Very happy with the service.“

“Had a recommendation to use Marvel from a friend and was not disappointed. Highly recommend these guys. Pricing was very fair and they had my AC unit back up within an hour.“

“I worked with Mike to setup a split unit a/c system a couple of months ago and he did a great job. He was very communicative and explained my options very thoroughly before the actual install. 6 months later and the unit is still working as expected. I also had a heating issue with my existing a/c unit and Juan was the technician sent out to help. It turns out the original wiring was done incorrectly but Juan patiently worked through the issue and made sure that the we got the heat back up and running. It was a lot of work but he was dedicated to make sure we were comfortable in our home.“

“thank you for the quick response, forrest was very helpful, i will definitely will do business with them again . thanks again“

“I would be hard pressed if there was ever a team more capable of realizing the exact solution you needed than Goldbaums. You'll see tons of reviews about Victor (s), and they're all true - this team is the best, and most respectful team you can have (as long as you treat them well too). These guys installed a super custom, compact 5 ton system, new ducts, and a super unique garage duct that is keeping me frigid on this 100ºF day in full view of the sun through my full-view aluminum garage doors (which are boiling hot to the touch).

Communication is fantastic, they explained absolutely everything, and left no stone unturned to explore what we could do in my space with my budget. Financing via Service Finance was painless and easy (so far, still waiting on docs to make first payment). Workers came in first thing in the morning, cleared out my old system, cleaned up around the area where the previous system was, and touched up paint around any cuts or even from behind my old thermostat - really classy.

Even post install, they're a text away from jumping on a call to troubleshoot remotely (if you allow access of course).

As an engineer, customer, homeowner, Highly highly highly recommend.“

“Technicians showed up on time, performed efficient and clean works.HVAC system is running flawlessly. The city inspection has been passed without a hitch.We like the detailed and straight forward contract.Highly recommended.“

“I called Bear State Air Conditioning Co for my air conditioning repair. They came today, and everything went smoothly. Reasonable price and good service!“

“I value a strong work ethic and honest education from contractors and the guys at I GO are top shelf A+ people. They arrived on time, kept me informed and were very reasonable in their rates. I highly recommend them. They replaced my TXV valve and recharged our 12 year old AC system. They were fast, informative, and friendly“

“Five ***** Stars

I HIGHLY recommend AIRWAVES HVAC! Mario and Giovanni were AWESOME! This is a genuine competent company of professionals who got the job DONE! They didn't try to sell me anything I didn't need and they're the nicest guys to boot! Will call again for any future problems with my Air Conditioning/Heating!“

“After getting three other quotes, Nelson Air stood out as the best in both price and professionalism. Their team was punctual, knowledgeable, and didn’t try to upsell anything unnecessary. Scott explained everything clearly and got the job done efficiently. I’m glad I chose Nelson Air and would definitely recommend them for honest, high quality service.“

“This crew was awesome. Lim is very communicative and all of them were kind with my elderly mom.“

“Tyler was straight up fantastic! He had my AC unit working super quickly and he was very respectful. I highly recommend them for all your HVAC needs.“

“We use their HVAC maintenance service every spring and fall. Keeps everything running smoothly and saves us from surprise breakdowns.“

“They did a great job. They were on-time. They spent over 10 hours removing/disassembling our old system and then installing the new one. We installed a vertical condenser unit, so the price of the hardware was more than a standard unit. However, the price I got from them was $1K-$2K less than others.“