Question
A KNX TP installation can accommodate at most 14 400 devices without using repeaters.
Answer
True
The calculation is 15 areas x 15 lines x 64 devices = 14 400 devices. With Line Repeaters extending each line up to 4 x 64 = 256 devices, the theoretical absolute maximum reaches 57 600 devices. In practice, installations of more than a few thousand devices are split into separate KNX projects connected through IP backbones for manageability rather than for technical limit reasons.
Preparation tip
If a project gets close to 14 400, treat the figure as a design red flag long before it is a technical limit — splitting into IP-coupled sub-projects keeps ETS responsive and downloads quick.
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