Bosch DUH Installation Manual page 6

1. Choose vent options
Vent Exhaust Option
The hood is designed for vertical or horizontal
discharge or can be installed in a recirculating
ductless version:
Vertical discharge:
Use a rectangular duct 3 1/4" x 10".....
....or use a round 7" duct
Examples of possible ducting
Recirculating
Horizontal discharge:
Use a rectangular duct 3 1/4" x 10"
Recirculating (non vented ductless)
Vertical discharge
6
Horizontal discharge