If a system uses water mist and gas at the same time, should the system be installed according to gas guidelines or water mist guidelines?
Water mist systems should always be installed in accordance with the guidelines with which the systems have been tested. The question is rather “should water mist systems which use water mist and gas at the same time” be tested in accordance with the gas test standards or in accordance with the water mist standards, or in accordance with both?” To that question, systems being marketed as water mist systems should be tested to the standards applicable for water mist systems, systems marketed as gas systems should be tested to standards applicable for gas systems, and systems being marketed as hybrid systems should be tested to some appropriate standards for the intended applications.
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