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5.303.1.1 New Buildings or Additions in Excess of 50,000 Square Feet
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Separate submeters shall be installed as follows:
- For each individual leased, rented, or other tenant space within the building projected to consume more than 100 gal/day (380 L/day), including, but not limited to, spaces used for laundry or cleaners, restaurant or food service, medical or dental office, laboratory, or beauty salon or barber shop.
Where separate submeters for individual building tenants are unfeasible, for water supplied to the following subsystems:
- Makeup water for cooling towers where flow through is greater than 500 gpm (30 L/s).
- Makeup water for evaporative coolers greater than 6 gpm (0.04 L/s).
- Steam and hot-water boilers with energy input more than 500,000 Btu/h (147 kW).