4.6 
1.1k+ *The Angi rating for Nest Installation companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Nest Installation needs.
*The HomeAdvisor rating for Nest Installation companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Nest Installation needs.
Last update on September 29, 2025
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 1984
Free estimates
Emergency services offered
"Amazing! Felipe and his crew are so nice and so professional. They installed a double door where a window used to be and also upgraded two other doors. And installed a dog door. Everything just took a week!"
+177
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Warranties offered
"Trinity Heating installed a new thermostat in my house. The technician, Jimmy, was professional and courteous. After the installation he took the time to explain to me how to set up and use the new thermostat. I’m completely satisfied with their service and will use them again if needed."
+83
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"Hired them to install a brand new unit, I am extremely satisfied."
Serving Diamond Bar, CA and surrounding areas
Approved
Free estimates
Credit card accepted
Offers commercial services
"Dan is the best there is. Not only does he do great work, his customer service is beyond great. I use him all the time in my property Management business and he has never let me down"
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2023
Free estimates
Emergency services offered
"Outstanding work. Outstanding professionalism. Outstanding customer service. I can’t say enough about how easy it was to work with Joseph and his team. I highly recommend him for all HVAC needs. They knew exactly what was needed for my home HVAC. The unit works perfectly. Did not have to wait for equipment to be ordered or long to have it installed."
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2025
Free estimates
Emergency services offered
"Was my consultant and advisor in the new repair system for my home"
+6
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"We have been trying to get an AC unit for the longest especially with this heat and iâ m so thankful i came across socal air quality. The installation and the whole process went very smoothly thanks to Pedro. I received a very affordable pricing and would definitely recommend the quality + the customer service."
+9
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1990
Free estimates
Emergency services offered
"Prompt, courteous, thorough and performed a great job."
+2
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
In business since 2004
Free estimates
Emergency services offered
"I had a great plumber that was honest and gave exceptional customer service. His name was Jesus Flores. I would definitely recommend him."
+18
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