I've noticed that dual-flush flushometer retrofit kits are mentioned as a way to earn this credit on existing commercial toilets (rather than replace the entire toilet); however, there is no mention of HET (1.28 gpf) retrofit kits. Are HET (1.28 gpf) retrofit kits also accepted by LEED? In both cases, does LEED need to know what the existing bowl type is? If the bowl is listed as 1.6 gpf would that be a problem in earning the credit.