How Many Spare Sprinkler Heads Do You Need?

According to the NFPA 13 and NFPA 25, if you have 300 sprinklers or less, you should have no fewer than six spare heads; if you have 300 to 1,000 sprinkler heads, you should have no fewer than 12; and if you have more than 1,000 sprinklers, you should have no fewer than 24 spares.