Marathon HVAC Services, LLC.

My home has an old floor furnace. After calling different businesses for a repair and getting outrageous quotes without first diagnosing the problem, we were fortunate to find this company. Outstanding customer service, quality in home services, professional and very affordable. We will continue to use their services and refer to others.

We have used Marathon for many years across several properties and they are simply the best. They have done everything from simple fixes to installing complicated systems beautifully. I couldn't recommend them more highly.

I have a commercial property in Signal Hill and have been using Marathon for over 15 years. they have replace three of my 7 units on my building have always done great work and backed up there repairs on the existing units. I trust them so much I even had them do my home up in LA, again a great job done.

First time using Marathon HVAC Services and they were very punctual and professional.

Certainly will be returning for their service!

Came out to check out my heater and found that the thermostat was malfunctioning. Gus was awesome (and very knowledgeable) and replaced the thermostat a couple of days later. Great service!

This is the best HVAC company around, in my opinion. I have appointments scheduled twice a year and each time they arrive exactly on time! Their work is superlative, and the service is friendly and educational. My highest approval goes to Marathon.

Edmond, Tomas and Ronald were all very professional. They were respectful of my space and did a great job with the install.

Our technician Edmond was amazing professional and courteous. Will definitely use Marathon for any future needs due to Edmond

Marathon HVAC is fabulous they came and installed my new system. Very efficient and professional great pricing to thank you Marathon.

Marathon is the best. They are thorough, professional and extremely reliable. As a realtor, I always use them and recommend them to our clients.