HVAC reviews in Anaheim, California

They are great to work with - Professional- always on time- Call ahead to confirm appointment.
They are awesome- would highly recommend them

Clase was professional and took time to explain his recommendations in a easy to understated manner Definitely will call him again .

Clase is always responsive and does a great job. I would recommend Guaranteed Air to everyone.

Clase and his fine young men (Eric, Brandon and Danny) did an excellent job installing a new AC and Heating System in my townhouse.
Great work guys, many thanks!

Loved Guaranteed Air. Fixed a problem that our original A/C installer missed. Very happy with the service we received. Will recommend to family and friends.

These guys show up when they say they will and bring all the resources needed to complete the job as quickly as possible. Very professional and personable. Highly recommended.

Patty from the office,Clase & Eric are very professional & compassionate . Service are perfect & honest everytime.
Highly recommended

Clase and his crew are the best! Always excellent, efficient and friendly! Can’t speak highly enough of their exemplary work!

Worked with Clase and crew on a whole house remodel in 2015 which involved all new ducting and adding a new A/C unit for half of the house. This year (2021) my old 2001 AC Unit finally died and called Clase for replacement. Always quality work from these guys.

Great service , have been using Clase and his team for over 8 years always happy with the service .

Clase is very professional, knowledgeable, efficient, timely and most importantly, honest. I am a property manager and have used his services several times in the past 3 years.

Clase is the nicest person. As soon as I call requesting service he responds immediately. He’s very professional, nice and does excellent work.

Power surge blew out my thermostat and a fuse in the furnace. Called in the morning, all was repaired and operating by 2pm same day. Good price, great service

Eric was great. He was on time, which was so important to me, and due to his expertise , found the electrical problem we were having. He had it fixed carefully and quickly. Dan

Excellent service and always takes the time to allow us to understand what is being accomplished and why something needs to be done. Clase has been very helpful and takes the time necessary to understand our questions and concerns.

Received a quote from Clase Simmons who was
amazing! He was very professional, totally knowledgeable, and a very pleasant gentleman!
We are in the process of deciding which company
to use but Clase is definitely on top. 👍

Eric and Brandon worked on our master Bathroom air vents, added couple new ones and larger grids in two others. We have very nice airflow now in our master bathroom and closet, well done…

Clase is very professional. He is knowledgeable and will do whatever it takes to fix a problem. He is responsive, on time and proactive. I highly recommend using Guaranteed Air.

Guaranteed Air installed a completely new HVAC system in my home a few years ago. City inspector said they did a great job. Every year they come and do a maintenance check and change the filters. The owner and employees are always on time and courteous. I would highly recommend Guaranteed Air.

Clase was very friendly and knowledgeable. I have been using Guaranteed Air for about 4 years now. They have provided better service than any other AC company I have use.

We find them to be very honest, trustworthy, fair, efficient, clean, professional and friendly. We've been using their services at least 12+ yrs for all of our HVAC needs.