Most common ACs used in Indian buses are HVACs (which stands for heating, ventilation, and air conditioning). This essentially means that these ACs can both be used for cooling and heating purposes. In rare cases, some operators also opt for ACs with only cooling capabilities as they tend to be slightly cheaper than HVACs. Bus ACs are very similar to room ACs we use in home. Just like rooms ACs, we can set the temperature to our needs and the auto cut-off feature will ensure that the set temperature is maintained throughout. For IntrCity buses, IDEAL AC TEMPERATURE will be 24 °C.