Jump duct

Jump duct

Flexible duct that connects a room to a common space to balance pressure and to provide a pathway for return air in forced-air heating and cooling systems. Jump duct grilles are typically located in the ceiling.
References in periodicals archive ?
Use a jump duct (Figure 2) or transfer grille (Figure 3), so warm air from the house is pulled into the closet, warming the closet.
This problem goes away with a grille on the return plenum (see Figure 1 again), coupled with a jump duct or transfer grille.
The quietest arrangement seems to be a jump duct with acoustically insulated walls.
We "invented" transfer grilles and jump ducts to balance the pressures and handle the opening and closing of interior doors.
He pushed mastic and duct testing ** and pressure balancing via jump ducts (Figure 2a) and transfer grilles (Figure 2b).