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Municipal Technical Advisory Service (MTAS)

Original Author: Wolf, Dennis
Date of Material: 06/19/2013


Residential Fire Sprinklers and ISO Increased Fire Flow Requirements for Large Homes

Reviewed Date: 05/20/2021
The consequences of insufficient fire flows are significant, and include increased risk to trapped occupants in rescue operations, a reduced ability to extinguish the fire, an increase in property damage, and increased risk to firefighters. An option for your community is passing an ordinance requiring residential fire sprinklers. The revised Insurance Services Office (ISO) Fire Suppression Rating Schedule (FSRS) takes effect in Tennessee on July 1, 2013. The new ISO Fire Suppression Rating Schedule has increased fire flow requirements for large homes (homes exceeding 4,800 square feet), but recognizes sprinklers and reduces the needed fire flow (NFF) accordingly.

Main Document(s):
file Residential fire sprinklers and ISO needed fire flow.pdf