UNE 100166:2025

The purpose of this standard is to establish the criteria to be followed for the calculation and design of ventilation systems for parking lots and garages.This standard does not apply to workshops, parking lots for vehicles used for passenger and freight transport, bus stations, and other vehicles used for the transit of vehicles that generate a wide range of gas concentrations, and which may operate inside the parking lot or garage in a manner different from that provided for in this standard. However, this standard can be used as a guide to establish the necessary criteria for these specific or related uses.This standard applies to parking lots and garages used predominantly by vehicles propelled by liquid fuels under atmospheric conditions. For parking lots and garages used predominantly by other types of vehicles, this standard can be used as a guide to establish the necessary criteria for the calculation and design of their ventilation systems.In this standard, ventilation systems in parking garages have five main objectives:1) Extract the smoke generated during the fire, helping to reduce its density and temperature, and allowing for faster smoke removal once extinguished, in accordance with a Type D strategy of the current Fire Protection Installation Regulations.2) Maintain concentration levels of polluting gases generated by vehicles circulating inside below the limits harmful to health.3) Increase the energy efficiency of the system so that it is capable of providing a flow adapted to the needs at all times.4) Minimize the risk of explosion due to the accumulation of combustible gases from gasoline and diesel vehicles.5) Increase the cost-effectiveness of the parking garage ventilation system by integrating the four previous objectives (fire smoke extraction, concentration of polluting gases, energy efficiency, and minimizing the risk of explosion) into a single ventilation system that serves to meet the four previous objectives.Note: The use of design procedures other than those outlined in this standard may also achieve the same objectives to an equivalent or better degree. Tools such as numerical simulation programs (CFD) can help assess the performance of the ventilation system.This standard does not apply to automated parking garages.For clear heights on each level of the parking garage exceeding 5 m, as an alternative to the methods described in this standard for the calculation and design of temperature control and smoke evacuation systems (TCSES) in the event of a stationary fire, the method described in UNE 23585 may be used. This does not preclude, for these parking garages, compliance with the other requirements of this standard to meet its other objectives.