An air conditioning system includes a temperature control unit, first and second filter units, and clean room equipment. The temperature control unit discharges temperature-controlled purified air through at least one of first or second outlets. The first and second filter units each filter purified air received from the temperature control unit based on using respective first and second filter modules. The first and second filter units include separate, independent housings. The air conditioning system blocks air flow from the temperature control unit into the second filter unit during an operation of the first filter module to filter purified air received at the first filter unit from the temperature control unit, and blocks air flow from the temperature control unit into the first filter unit during an operation of the second filter module to filter purified air received at the second filter unit from the temperature control unit.