<prompt> The effective temperature ofcomfort zone is69 - 76 degF77-80 F83-85 F86-90 F  <response>: 77-80degF 641-Park 20thComfort zones - may be defined at the range of effective temperatures over which the majority of adults feel comfortableComfort zones evaluated in India are as below:TypesCorrected Effective Temperature deg- CCorrected Effective Temperature0deg F1 Pleasant and cool20692 Comfortable and cool20-2569-763 Comfortable25-2777-804 Hot and uncomfortable27-2881-825 Extremely hot28836 Intolerably hot3086 Predicated four hour sweat rate P4SR1 Comfort zone1-.3 litres2 Just tolerable3-4.5 litres3 Intolerable4.5 litres 