Basically, based upon a normal RTU technique making use of DX coils, the O/A requires of ASHRAE sixty two-2001 may normally exceed the actual interior masses and dictate the air con tonnage essential according to a maker's standard advice of the highest of 25% O/A for DX units. Exhaust ventilation: https://restaurant-and-bar-ventil42963.blogdigy.com/rumored-buzz-on-restaurant-and-bar-ventilation-44132317