Mechanical Exemptions

Air Conditioning
  1. Portable heating appliances.
  2. Portable ventilation appliances.
  3. Portable cooling unit.
  4. Steam, hot- or chilled- water piping within any heating or cooling equipment regulated by this code.
  5. Replacement of any minor part that does not alter its approval of equipment or make such equipment unsafe.
  6. Portable evaporative coolers.
  7. Self-contained refrigeration systems containing 10 pounds (4.54 kg) or less of refrigerant and actuated by motors of 1 horsepower (746 W) or less.
  8. Portable-fuel-cell appliances that are not connected to a fixed piping system and are not interconnected to a power grid.