For drinking water, use an exact chloramine-rated point-of-use filter. For every-tap treatment, catalytic carbon with enough media volume and contact time is the stronger whole-house approach.
Best whole-house category: catalytic carbon
Catalytic carbon is commonly selected for chloramine because it promotes faster reduction reactions than standard activated carbon.
System flow and media contact time still matter, so compare service flow rather than only tank size.
Best point-of-use category
Some under-sink carbon systems and RO systems publish chloramine reduction data. For kitchen-only concerns, point-of-use treatment can be much less expensive than treating the whole home.
Shower and bathroom treatment
Shower filters operate at high flow and temperature, so performance should be judged on shower-specific evidence. Weddell and similar products belong in this narrower use case rather than being generalized to whole-home chloramine treatment.
Check the utility disinfectant first
Utilities may use chlorine, chloramine or seasonal conversions. Confirm the current disinfectant before spending money on a chloramine-specific system.