5. The outdoor design temperature for heating purposes, mentioned in sections 55, 78, 137 and 138 of a building situated in a municipality listed in Schedule 1, is the temperature shown for that municipality.
However, for a building situated elsewhere than in a municipality listed in Schedule 1, the outdoor design temperature is the one for the nearest municipality mentioned; or in the case of a building located in a municipality that is equidistant from 2 listed municipalities the outdoor design temperature is that of the municipality with the lowest temperature.