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
"100% recommend very professional, after installation they clean up everything too highly recommended"
+263
Serving Ontario, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"Danny did an excellent job all the way thru. Fit my budget and did the install very timely and system is up and fully running same day. Highly recommend their services!"
+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
"We bought a house from a smoker. We hired a separate company for the decontamination and Robert coordinated with them to be able to start the restoration after they were done. He had to paint EVERYTHING: ceilings, walls, closets, trim, doors.... We replaced ~80% of the flooring with tile and he was able to put in a beautiful medallion! He replaced a toilet, fixed other plumbing issues, installed ceiling fans on the patio, cleaned up the yard, changed all the doorknobs, repaired the garage door, replaced the keypad remote.... There were so many things, it is difficult to list them all. The property looks BEAUTIFUL and we plan additional projects for him. We highly recommend Robert to care for your home as if it were his own!"
+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
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 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
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
Free estimates
Credit card accepted
Offers commercial services
"He did a great job fixing our air when it was over 100°. I would hire him again. I have also referred a few people who needed help. I hope they called. Thanks again and God bless."
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