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. The first phase is to be completed by December 31, 2028, followed by the second phase by December 31, 2030, and the third by December 31, 2032.

The implementation of this bill is contingent upon the allocation of federal funds or specific appropriations of state funds by the legislature, as the TDCJ is prohibited from using state funds for this purpose otherwise. The bill also emphasizes the importance of efficient resource use and allows for the consideration of various factors, such as existing systems' capabilities and the potential use of inmate labor to reduce costs. The act is set to expire on January 1, 2035, and will take effect immediately if it receives a two-thirds majority vote in both houses; otherwise, it will take effect on September 1, 2025.