![eCaps_Icon eCaps_Icon](https://content.greenheck.com/public/DAMProd/Website_Square_Desktop/10001/Dampers_Doors_Pressure-Relief.png)
Pressure Relief Doors
Permits rapid neutralization of the pressure differential between the inside and outside of the HVAC system.
Pressure relief doors open automatically at 1 in. wg above normal operating system pressure. The door prevents ductwork from imploding or exploding should the dampers close while the fan is running.