4.6 
1.4k+ *The Angi rating for Nest Installation companies in Ontario, 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 Ontario, 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 July 21, 2026
Serving Ontario, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2006
Free estimates
Emergency services offered
"Very professional/ friendly/ left the work place clean/reasonable price.I had a mailbox installed."
+263
Serving Ontario, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"Danny is awesome to work with and will get you the best deal he can find for your job. The guys are professional and prompt. They do A+ work and I would highly recommend them for any kind of work you may need completed under their profession. They installed our ac unit , perform routine maintenance and we are now getting attic insulation installed next week."
+67
Serving Ontario, CA and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
"Monty does excellent work. I needed a window AC installed which involved some custom fitting and mounting. I have a sliding window from left to right instead of up and down so to do a clean install was more involved than a traditional up down sliding window. I believe Monty went above and beyond to make sure the work was quality and addressed all my concerns. He made sure the whole installation was well sealed off using generous amounts of silicone.I highly recommend him for any handyman work you might need accomplished."
+21
Serving Ontario, CA and surrounding areas
Approved
In business since 1996
Free estimates
Warranties offered
"The work Robert did looks beautiful and turned out as nice as I had imagined it. Thank you so much!"
+7
Serving Ontario, 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 Ontario, CA and surrounding areas
Approved
In business since 2013
Free estimates
Warranties offered
"Ulises took the time to explain everything he was doing! Great service"
+4
Serving Ontario, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2012
Free estimates
Customers say: Quick response
"Great job. Came out next day. Didnâ t try to sell me something I didnâ t need. Reasonable price."
+4
Serving Ontario, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"furnace was installed and works well. I repaired gap in drywall above furnace after installation. for $3800 I think they should have offered to repair the drywall or compensation for my work. George reached out to me about my concerns and offered to resolve the issues. I'm very pleased with the job and his customer service."
Serving Ontario, CA and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"Robert and Michael installed a whole new air system in our addition. They went above and beyond finding the right system and making sure in was properly installed."
Serving Ontario, 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"
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