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APTA-RT-VIM-RP-004-02 [2013]
Recommended Practice for Heating, Ventilation and Air Conditioning Periodic Inspection and Maintenance
Heating, ventilation and air conditioning (HVAC) are essential for passenger comfort, and in some North American climates, health. This Recommended Practice for inspection of air comfort systems is for all transit systems that consider properly functioning HVAC systems a prerequisite for revenue service.
American Public Transportation Association [apta]