Place a litter cabinet in a quiet, consistently accessible location where the cat can approach and leave comfortably. The fact that it resembles ordinary furniture does not make every furniture position appropriate for toileting. Avoid narrow busy routes, sudden appliance noise and locations where another pet can easily wait across the entrance. Keep feeding, water and sleeping areas separate from the litter area. Check the practical requirements too: doors must open, the tray must come out and ventilation openings must remain clear.
A room that is normally closed overnight may not provide reliable access, even if it looks ideal during the day. Before buying, mark the cabinet footprint and consider how the household moves around it. Once installed, maintain access and watch the cat's response. If a previously reliable cat starts avoiding the tray, review both the location and possible health causes instead of assuming it simply needs more time.
Check both the cat’s route and your cleaning route. The cat needs access even when household doors are closed, while you need somewhere to set the removed tray without blocking the only passage through the room.
For product comparisons alongside this advice, see OakAlcove litter cabinet and Library House litter cabinet. The details below explain their sizes and uses.
Further reading: rspca.org.uk; battersea.org.uk.
OakAlcove litter cabinet
Library House litter cabinet
Ivory Gallery cabinet and tree