OBJECTS EXEMPT FROM ARIZONA BOILER RULES

  1. Boilers and lined hot-water heaters regulated by the U.S. government.

  2. Boilers and lined hot-water heaters located in private residences or apartment complexes of not more than six units.
  3. Boilers and lined hot-water heaters operated on Indian reservations.
  4. A lined hot water heater that does not exceed any of the following:
  • Heat input of 200,000 British thermal units per hour;
  • Water temperature of 210°F; and
  • Nominal water-containing capacity of 120 gallons