If you coordinate upfront bid documents and are planning to have a dry sprinkler system on your project, you probably get the same question from electrical engineers as I do - how large will your compressor be?
It can be a difficult question to answer, considering there's multiple manufacturers and a handful of different options in choosing the right compressor for your project.
NFPA 13 requires that a dry system have an air supply capable of restoring normal air pressure for the system within 30 minutes (NFPA 13 2002-2010 Section 188.8.131.52.2, 2013-2016 184.108.40.206.2).
Fortunately, I've made a small update to the Sprinkler System Volume Calculator that indicates compressor sizes associated with your system volume. See the full tool here.
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Joseph Meyer, PE, owns/operates his own Fire Protection Engineering practice in St. Louis, Missouri. See bio on About page.