Benchmark or industry standard for equipment not listed in table

Where can I find a benchmark or industry standard for the below equipments in kitchen. Although the supplier claim that they are based on the current technolgy to reduce the water consumption but difficult to calculate the 20% water reduction. 1. Flight dishwashers: we are not proposing that dishwashers with racks or baskets are used but have specified ‘flight’ dishwashers which run on a continuous belt, which are more suitable for the number of meals involved. These use 165 litres per hour to wash up to 3,800 plates, bowls, etc., per hour. 2. Pot washing machine : water consumption (maximum) 5.8 litres per cycle. 3. Combination ovens: steamers not used but 10-grid and 20-grid combination ovens will be included (the number of grids relate to the maximum number of 1/1 gastronorm cooking trays/pans the oven can accommodate). These use 6.3 and 12.5 litres of water per hour respectively 4. Water washing system : a manually operated water washing system is proposed for the ventilation canopies above the main cooking equipment. This will be used on average once per month and the washing process uses 35 litres of water per wash cycle. Thank you Regards