ISO 19659-4:2026

Railway applications — Heating, ventilation and air conditioning systems for rolling stock — Part 4: Design parameters, and test and inspection items for the HVAC unit ISO 19659-4:2026

Publication date:   Apr 15, 2026

Scope

This document specifies requirements and guidelines for:

the design parameters to be provided to the heating, ventilation and air conditioning (HVAC) unit manufacturer by the rolling stock manufacturer (“Customer”) and the railway operator,
the test and inspection items, requirements and methods used by the HVAC unit manufacturer to verify that the HVAC unit conforms with the design parameters.

This document is applicable to HVAC units for the passenger area and driver’s cabs in urban (metro, tramway), suburban, regional and main line vehicles.