Environmental Airconditioning maintenance work is the total replacement of the system or the installation of boilers or pressure vessels that must be installed by licensed persons pursuant to rules and regulations adopted by the commission under the Texas Airconditioning and Refrigeration Laws.

Environmental Airconditioning maintenance work is the total replacement of the system or the installation of boilers or pressure vessels that must be installed by licensed persons pursuant to rules and regulations adopted by the commission under the Texas Airconditioning and Refrigeration Laws.