Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2019
Free estimates
Warranties offered
"The installers showed up right on time and were friendly and efficient. They quickly removed my old furnace and installed the new one, making sure to clean up any debris created."
+87
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1978
Free estimates
Emergency services offered
"All went well. They have put me on a service contract so I save money, and they come out twice a year to do maintenance on the central air and heating for my house."
+5
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1988
Free estimates
Warranties offered
"The service I received from Air-Tech was above my expectations. Alex made the selection process effortless and the installation was fast and efficient. The folks with Air-Tech are real pros."
+8
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"HD Mechanical did an amazing job. I felt safe hiring them to install my ac unit. They were very professional and they are very trustworthy. Would definitely recommend them to everyone."
+14
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2002
Free estimates
Credit card accepted
"We had Temp Air install our AC unit. The best decision we ever made. They were fast, reliable and dependable. Excellent customer service, did a phenomenal job. After a couple of years something was going on with our unit, I called them and immediately they send out a technician Juan, who was phenomenal. He explained what the issue was and resolved it asap! Highly recommend this company!"
+14
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2009
Emergency services offered
Warranties offered
"I had All City Plumbing come out to help me fix my high water pressure. Technical named Alexis H came and was able to install a new 3/4 pressure regulator. Regulator he installed was double union and he explained that is to help make it be an easier exchange if it goes out again. Highly recommended All City Plumbing. Happy with work and value."
+42
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"This is the second time I used this company to replace a worn out central A/C unit and evaporator coil (we have two zones). On both occasions, they showed up on time and within a day or two of requesting service. The men who came out were professional, knowledgeable, courteous, and efficient. I am completely satisfied."
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1990
Free estimates
Credit card accepted
"Very responsive company and I am very satisfied with their installation of my AC system."
+6
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2025
Free estimates
Emergency services offered
"Their tech arrived quickly and was courteous and friendly. He figured out the problem with my AC and the work was completed in a timely manner"
+6
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2023
Free estimates
Emergency services offered
"Calls back within minutes. Quote was great. Installed within a few days and left the house in clean condition. Very professionall. The AC unit works great"
From average costs to expert advice, get all the answers you need to get your job done.
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