Is a wet-pipe sprinkler system allowed to be used to circulate water for heating and cooling purposes?
I am designing a wet-pipe sprinkler system under NFPA 13-2019 Edition.
The building owner would like to use the sprinkler system as part of the building's heating system. I can find this described as "allowed" in NFPA 13-2016, but not in the 2019 Edition.
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