A retail space inside a mall is exploring to purchase a dishwasher. This dishwasher will be used by the limited store employees only twice a day.

To clear the pre-requisite, will an energy-star rated dishwasher suffice? (There is a water consumption requirement in terms of Gal/Rack)

This dishwasher will be counted as a residential or commercial grade? (What are the parameters to classify it as Resi/Commerical) 

(Client has sought confirmation about a dishwasher having 2 racks and consumes 3 gal./cycle. Can we consider it as 1.5 gal./rack then ?)