Leading Mechanical Maintenance Solutions in the Inland Empire


Therma is one of the most trusted names for mechanical maintenance solutions in California’s Inland Empire. From Riverside to Ontario to El Monte, Therma is known for outstanding client service and attention to detail.  We balance innovative facility specific solutions with pragmatic know-how at an affordable cost.

Therma has formed hundreds of successful client relationships spanning decades.  Our clients represent a diverse range of sectors including Commercial, Industrial, Healthcare, Office Buildings, and Food Processing Facilities.

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    What We Do

    • Energy Services
    • Test, Adjust and Balance (TAB)
    • Heating, Ventilation and Air Conditioning (HVAC)
    • Plumbing & Service
    • Fabrication and Engineering
    • Reactive Repairs and Preventative Maintenance
    • Architectural Sheet Metal
    • Building Automation
    • Infrastructure Management
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    Therma 695 Uai 1067x1067

    The Choice of the Inland Empire


    For over half a century, Therma has remained on the cutting edge, offering the very best in mechanical construction and maintenance in the Inland Empire. In addition to our reputation for unparalleled customer service, Therma is known for our innovation and creative solutions for facility-specific needs, all at competitive price points.

    Our Inland Empire clients know they can rely on Therma for results. We offer testing, maintenance, and repair on HVAC systems and facility equipment for the Riverside, San Dimas, El Monte, Ontario areas and more. Our tenured and passionate experts are available around the clock to help with a wide variety of engineering needs including design engineering and estimating, fabrication and capital projects.

    We are Inland Empire’s premier mechanical engineering contractor, offering planning and maintenance services to areas including San Dimas, El Monte, and Riverside. We specialize in installation, fabrication and planned mechanical preventative maintenance, in addition to BIM modeling and energy efficient systems. We also pride ourselves on offering quick and easy repairs without disrupting your building’s operations. Contact our representatives today to see how we can help your Inland Empire business thrive.