we are working on a hotel project where the guest rooms are provided with dual flush (4.5L/3L) WCs. no urinals are provided. as per the LEED guideline a single person use WCs 5 times per day in residential use. how can we calculate the average flush rate in these circumstances. should we assume that 1/4 (full flush/half flush) ratio or (2/3) (full flush/half flush) ratio? or is there any other basis to calculate this? thanks in advance.