Which design feature enhances safety and functionality of CNG facilities?

The roof design for ventilation is essential in enhancing the safety and functionality of CNG facilities. Proper ventilation is crucial in an environment where compressed natural gas is stored and dispensed, as it helps to prevent the accumulation of gas that could lead to hazardous situations such as explosions or fires. The design of the roof facilitates the flow of air, helping to disperse any potential gas leaks and maintain air quality within the facility.

While glass walls might improve visibility and all-metal construction and concrete flooring provide durability and structural integrity, their primary functions are not directly related to enhancing safety from gas leaks. Ventilation systems specifically play a critical role in ensuring that any accumulated gas is effectively managed, making this design feature vital for the operational safety of CNG facilities.