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We're a family-owned and operated HVAC company that takes pride in serving the Covina area. We use integrity when dealing with our patrons, who eventually call us due to how much we stand out from other companies through excellent customer service as well as ensuring quality work specific for your needs!

If you're looking for a trustworthy HVAC contractor, Sinclair Air Systems is a great option. Our skilled professionals offer high-quality heating services for every season, and we also have maintenance and repair plans to help your HVAC system run smoothly. We know how important it is to be comfortable in your home, which is why we provide excellent HVAC solutions and customer service at affordable prices. With our years of experience in this industry, our team can quickly diagnose and fix any HVAC issue. Choose Sinclair Air Systems to have peace of mind about your home's HVAC system.

About Us

About Us
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The leading HVAC Installation, Service & Repairs in the greater Los Angles Area

local business

Dedicated Team


Completed Projects


Happy Clients

What We Do? 


Located in Covina, California and serving the surrounding areas for over 30 years is Sinclair Air Systems. Sinclair prides themselves on providing excellent customer service that ensures quality work specific to your needs while maintaining integrity when dealing with patrons who refer themselves or others into buying HVAC equipment from this family owned business 

Residential HVAC Systems Replacement & Installations

Residential HVAC


Commercial Air Conditioning


Installation, Service, & Sales


Package Units


Air Conditioning Compressors


HVAC Equipment and repair

Interior Design


Sinclair Air Systems provides quality workmanship and valuable state of the art equipment. Sinclair Air believes in developing a good foundation with our customers as an important aspect of our success. Quality and value is what you will receive with Sinclair Air Systems.

-Owner, Rick Cortez

Why Choose Us? 

Putting the customer first
  • Free Estimates

  • Senior & Veteran Discounts

  • WE Service All Major Brands

  • 24/7 Customer Support

  • 100% Satisfaction Guarantee

HVAC installation

What Our Clients Say About Us? 


I recently had a new Coleman furnace put in my mobile home, but before Mr. Cortez just replaced it- he and his crew checked everything out thoroughly to see if my old heater could be fixed.

Being a senior of 83 years old and a former teacher he did everything possible to save me money, he was very professional, did excellent work and I certainly would highly recommend Sinclair heating and air conditioning to anyone who needs his service.

Fay K-Covina, CA.


At Sinclair Air Systems, we pride ourselves on providing quality service to our customers. We know that your air conditioner is an essential part of your home, and we want to help you keep it running smoothly. That's why we offer a full range of services, from repairs to replacement. We also offer maintenance packages that can help keep your system running efficiently and prevent future problems. So if you're in need of air conditioner service, don't hesitate to give us a call. We'll be happy to help you keep your home comfortable all year long.

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