If our potential project is currently installing flush & flow fixtures, but wants to start the performance period, is it acceptable to enter the new flush & flow rates as long as they are all installed by the completion of the performance period or will they have to delay the performance period until installation is entirely completed?
In one of those strange twists to the LEED rating system, neither WEp1 nor WEc2 have a performance period. That means that as long as the fixtures are performing as promised on the date of submission you should be ok.