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