It depends on what system you’re eyeballing. Aquasana’s OptimH2O reverse osmosis system, for example, is NSF certified to remove 97.66% chloramines. Then there is the Aquasana AQ-4000 countertop water filter that reduces chloramine to more than 97%.
As for the AQ-5300, chloramine reduction is insufficient. And both the AQ-4100 & AQ-4105 shower filters are claimed to remove chloramines but to what extent we don’t know.