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neutral pressure

    0.01 sec.
neutral pressure [′nü·trəl ′presh·ər]
(hydrology)


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After 5 minutes into the NFPA 252 test, the neutral pressure level in the furnace shall be established at 40 inches (1016 mm) or less above the sill.
The pressure distribution inside a building has long been known to decrease with height such that the pressure inside a vertical shaft like an elevator shaft and the pressure on individual floors will reach equal values at a location called the neutral pressure plane (NPP).
Tested and rated to meet or exceed all local, regional, state, and federal code requirements, PyroEdge-20 fire-rated glass offers a clear 1/4" tempered glazing, rated for 20-minute positive and neutral pressure applications without hose stream testing.
 
 
 
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