Question

How does the free-field range of KNX RF compare with the distance achievable inside a building?

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Answer

C — The free-field range is significantly higher than the in-building distance

Correct: free field is the open-space best case and is significantly higher than what is achievable inside a building.

Source

KNX Basic Course Documentation — 2 — p. 139

All proposed choices (exam context)
  1. A.The free-field range is significantly lower than the in-building distance
  2. B.They are always exactly equal
  3. C.The free-field range is significantly higher than the in-building distance
  4. D.The in-building distance is unlimited
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Last updated: 19 May 2026

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