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The following buildings, or portions thereof, separated from the remainder of the building by building thermal envelope assemblies complying with this code shall be exempt from the building thermal envelope provisions of this code:
  1. Those with a peak design rate of energy usage less than 3.4 Btu/hft2 (10.7 W/m2) or 1.0 watt/ft2 (10.7 W/m2) of floor area for space conditioning purposes.
  2. Those that do not contain conditioned space.

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