Miami Dade County Logo UL Logo US Green Building Council Member Logo AMCA Member Logo

Doors > Manual Pressure Relief Doors

PP-10, PN-10

Manual Pressure Relief Door

PP-10, PN-10 Product Image

Model PP-10 (positive) and model PN-10 (negative) pressure relief doors are designed to open automatically 1"w.g. above normal operating system pressure. The function of these doors is to prevent ductwork form imploding or exploding in the event dampers close while the fan is still operating. These doors permit rapid neutralization of the pressure differential between the inside and outside of the HVAC system. The pressure relief setting of the door can be factory adjusted from 1"w.g. to 12"w.g.