Best Heating & Air Conditioning / HVAC In Covina

“Marathon is the best. Exceptional customer service and the technicians Daniel and Joziah were top notch. 100% recommend using this team.“

“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.“

“Sinclair Air Systems has been our go-to for years. They are the absolute best! When we have temperatures in excess of 100° and no a/c, it’s a problem. Sinclair Air is incredibly responsive, professional and efficient from beginning to end. They are thorough in their evaluation, making sure to properly assess and diagnose the issue. They treat their customers like family and it truly makes all the difference.“

“Joey has done AC and heating work on 3 of my rental properties and also on my primary home. He is very thorough and follows through on his word. He made himself available to me in a time of emergency. I highly recommend J Choy HVAC. . Today he finished the work.“

“We use Air On Time for all our Air Conditioning Issues. They are wonderful, always on time, Honest and Reasonable. We highly recommend them.“

“Benito was a star. He was so patient and answered all of my questions very throughly. He went above and beyond!!!!“