H.B. No. 3006 mandates the Texas Department of Criminal Justice (TDCJ) to purchase and install climate control systems in various areas of its facilities that currently lack such systems. The bill defines "required temperature-controlled areas" to include hospitals, housing areas, kitchens, and other essential spaces, ensuring that temperatures are maintained between 65 and 85 degrees Fahrenheit. The installation will occur in three phases, with each phase covering approximately one-third of the facilities and capped at $100 million per phase, with deadlines set for completion by December 31, 2028, 2030, and 2032.

The implementation of this act is contingent upon the allocation of federal funds or specific appropriations from the state legislature. The TDCJ is prohibited from using state funds for this purpose unless explicitly allocated. The act is set to expire on January 1, 2035, and will take effect immediately if it receives a two-thirds majority vote from both houses of the legislature; otherwise, it will take effect on September 1, 2025.