Austin, Texas (July 13, 2026) — IAPMO^® applauds the Texas Department of Licensing and Regulation (TDLR) for its adoption of the 2024 Uniform Mechanical Code (UMC^®) for applications regulated under the state's Air Conditioning and Refrigeration Contractors program.

The updated code is scheduled to become effective Sept. 1.

The adoption of the 2024 UMC provides Texas contractors, inspectors, engineers, manufacturers, and building owners with the latest mechanical code requirements designed to enhance public health, safety, energy efficiency, indoor air quality, and system reliability. The UMC is developed through an American National Standards Institute (ANSI)-accredited consensus process that brings together regulators, installers, engineers, manufacturers, and other industry stakeholders. 

“Texas continues to demonstrate its commitment to protecting public health and safety through the adoption of modern, science-based codes,” said Christina Kaeini, IAPMO senior director of Government Relations. “The 2024 Uniform Mechanical Code incorporates critical updates that address evolving technologies, indoor air quality, ventilation performance, and refrigerant safety while providing clear, enforceable requirements for the mechanical industry.”

Among the significant updates included in the 2024 UMC are enhanced air filtration requirements, new ventilation system balancing provisions, updated refrigerant safety classifications, and requirements addressing the use of emerging low-global-warming-potential refrigerants. The code also includes new provisions supporting modern mechanical system design and installation practices. 

Texas has a long history of adopting nationally recognized construction and safety codes that provide consistency for the regulated community while supporting innovation and economic growth. The adoption of the 2024 UMC helps ensure that HVAC and refrigeration professionals across the state will be working under up-to-date standards reflecting current industry best practices. 

IAPMO extends its appreciation to the Texas Department of Licensing and Regulation, the Texas Commission of Licensing and Regulation, industry stakeholders, and code officials who participated in the rulemaking process and contributed to advancing safe and sustainable mechanical systems throughout the state.

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IAPMO is a global team of experts engaging industry and government for a safer built environment. We offer codes and standards including our flagship Uniform Plumbing Code and Uniform Mechanical Code, featuring our UPC and UMC Certification Marks, that serve as a consistent model for building professionals, manufacturers and researchers. Our deep expertise in codes and standards is applied to our rigorous product testing, certification and inspection services, professional development offerings, policy and advocacy work. We also serve the market under specialty brands including The IAPMO Group, Construction Products Group, System Certifications Body and IWSH, our non-profit foundation. For more information, visit iapmo.org.