Supply and exhaust ventilation, air conditioning and heating system (hereinafter VCHS) is applied for providing specified temperature conditions in metro substation rooms.

external air intake into transformer hall;
external air intake into switchgear rooms and accumulator batteries room;
exhaust air release from transformer hall, switchgear rooms;
exhaust air release above roof ridge from accumulator room and WC room;
exhaust air release from cable cellars, if necessary;
service premises ventilation: air intake through opened windows, and air release through WC room and production premises.

Parameter Name	Parameter Value
Use	heating ambient temperature cooling for transformers
Maximum temperature (°C)	16 - 30