To put it differently, based upon a standard RTU system making use of DX coils, the O/A calls for of ASHRAE 62-2001 could usually exceed the actual inside masses and dictate the air-con tonnage necessary depending on a manufacturer's typical advice of the highest of 25% O/A for DX systems. https://restaurant-and-bar-ventil31963.bloggazza.com/28948207/the-restaurant-and-bar-ventilation-diaries