24/7 Service: 951-903-3152

 Email: Service@cbhvac.com

How Can We Help You?

Servicing Southern California For 35+ Years

24/7 Emergency Service

Call 951-903-3152

Los Angeles County

Riverside County

San bernadino County

Orange County

San Diego County




Commercial HVAC Retrofit, Repairs & Maintenance

Quality Service You Can Trust

Why Christian Brothers

Christian Brother’s Mechanical Services is one of the largest family owned commercial air conditioning companies in Southern California. Our experience and depth of knowledge ensures you will receive the finest quality service available. Our technicians are factory trained with the expertise and ability to handle any system no matter how complex.


35+ Years of Business in Southern California.    Family Owned and Operated.

Fair Prices

We Strive For Competitive Pricing to Maximize your Return On Investment.

Award Winning Safety

ABC STEP Award 2018-2019 Platinum Level and CAL/OSHA Golden Gate Recognition. 

Satisfaction Guaranteed

We Guarantee Parts and Labor for 1 Year to Deliver a First Class Experience.


Choosing The Right Company

We know how difficult it can be dealing with urgent break downs and not getting the service you demand. At Christian Brothers  we strive for 100% customer satisfaction.  When your HVAC goes down production will either halt or slow and dollars will be lost. Having a technician on site immediately when these situations arise is crucial. For over 35 years we have excelled in the industry by keeping up to date with the latest industry trends and standards to meet our customers needs.


“Our core beliefs are reflected in our company name. Christian Brothers reflects the quality, integrity and service that we aspire to deliver.”

Donald Lemons



Service Repairs

From the threat of loosing cooling of your office, product loss or damage. We prioritize critical repairs first and foremost and rush to the scene to resolve the problem quickly, day or night, 365 days a year.

HVAC Replacement

We specialize in custom solutions to best plan for your equipment upgrade. Maximizing value by  potential rebates, top manufacturer warranties, and volume purchasing.



Reduce the threat of production loss or keeping your customers  and employees comfortable. This keeps your equipment running at the factory specifications to reduce down time and lower energy cost.


Air Handlers

From small equipment to large equipment CBMS creates a partnership for you and your business HVAC needs, no matter what brand or age.


24/7 Service 365 days a year we know the urgency in keeping your plant running. Our tech’s are highly qualified to handle any size refrigeration application.


Our boiler technicians are factory trained and certified. CBMS seeks highly skilled professionals to handle your equipment.


We specialize in process and comfort chiller systems. We have certified chiller experts qualified for any size system.

HVAC Units

From small equipment to large equipment CBMS creates a partnership for you and your business HVAC needs, no matter what brand or age. 


Stop the threat of production loss by having a qualified HVAC partner. We have certified chiller experts qualified for any size system.


24/7 Service 365 days a year we know the urgency in keeping your facility running. Our technicians are highly qualified to handle  any size HVAR-R setup.


Reduce the threat of production loss by having a HVAC partner to assist you. CBMS seeks highly skilled professionals to handle your equipment.


Lower Energy Costs

Minimize System Downtime

Extend System Life

Reduce Equipment Repairs

Christian Brothers Mechanical Services, Inc. IconChristian Brothers Mechanical Services, Inc.

11140 Thurston Lane, Mira Loma

4.7 76 reviews

  • Avatar Christian Logay ★★★★★ 3 months ago
    As always Christian Brothers saves the day! Or in my case the night! I had 40 guest rooms without heat and was stumped on how to fix it. I called CB and they had my hotel back online in 2 hours! Awesome
  • Avatar T K ★★★★★ 4 months ago
    CB is a great place to work. The people are great, the working environment is professional but relaxed, and Don the owner is very generous.
    I think the best part about this company is that they can see the potential in their employees,
    … More and give them opportunities they might not have otherwise.
  • Avatar A A ☆☆☆☆ 4 months ago
    Driver of vehicle 62 on his phone at the light whatever not bothering me. Two left turning lanes he turns into my lane I avoid him whatever people don't know how to drive then he swerves at me I honk to get his attention to not hit … More me & he looks up off his phone & swerves again this time on purpose I just try & ignore & he goes around to swerve on the other side flipping me off with my kid in the back using the truck as a weapon then following me home I had to pass it so he didn't know where I lived. I have a very identifiable vehicle your company isn't far he probably lives in the area it's only a matter of time until he spots my vehicle parked & damages it someone that unsound.
  • Avatar Madison Mathis ★★★★★ 9 months ago
    I work for a general contractor called Morris Construction and we use Christian Brothers regularly and we are always very happy with their team and the work performed. Our whole company really enjoys working with Sarah, she is a great estimator … More and project manager. We've also liked working with Johnny as well. Their response time is great whether it's from the field or the office. We definitely recommend working with Christian Brothers.
  • Avatar dfeiler100 ★★★★★ 11 months ago
    I'm the chief engineer of a half a million square foot building and Christian Brothers is doing the construction of a medical facility. While working with the pipe fitting foreman, Jasen, and the sheet metal foreman, Travis, I have … More noticed that the quality of work that they require from their crews is outstanding and they have a great attention to detail. I would recommend this company for any projects that demand quality work. They will be recommended for future construction projects in our building.
  • Avatar Bianca Rodriguez ☆☆☆☆ 2 months ago
    CUSTOMER BEWARE!!! This company will misdiagnose your unit, charge you $180 an hour and then turn around and claim a new issue arised causing an additional cost.
    They charged me close $100 for a cooler fan to be replaced and then claimed
    … More after they did the work that the compressor suddenly stopped working. They are dishonest and look for way to get more money out of an already financially invested customer.
  • Avatar Elvis Bowman ★★★★★ 10 months ago
    Christian Brothers Service was a 5 star experience. They made the stress of keeping my customers happy go away. Highly recommend this to anyone looking for a new service company.
  • Avatar Hillier Seton ★★★★★ 9 months ago
    Have been with christian brothers since 1988, Don is a awesome owner. Thanks for all the great business over the years
  • Avatar Mariela Gonzalez ★★★★★ 11 months ago
    I've been working at CB for a little over a year. I love working here. My team makes me feel valued, and that's something that's not easy to find in a company. I've learned many things here. My supervisors are always … More eager to teach me new responsibilities. CB is an employer who cares about their employees.

Contact us

Give us a call or email to get started right away. CBMS also gives new incentives to new customers.

11140 Thurston Lane, Mira Loma, CA 91752


CA Contractor License #499547

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11140 Thurston Lane, Mira Loma, CA 91752