Ken,
If all the sprinklers in the units are within close proximity to a
heat source that would normally require the higher temperature, then
that would be appropriate. If not, then you should use the
temperature ratings as described in NFPA 13. What advantage would
there be to using 175 degree sprinklers only? There shouldn't be any
problem mixing temperature ratings as long as they are detailed on
the drawing as to what to use where.
Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
860-535-2080
www.fpdc.com
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