FANTECH GO1215 CBD Backdraft Damper Shutter for Centrifugal Roof Unit Internal Frame 28 x 28 x 6cm
NOTE: You will receive one (1) unit.
Dimensions
Cut out: 28 cm x 28 cm x 6 cm (internal frame)
Features
- The backdraft shutters have a galvanised steel frame and extruded PVC flaps; the flap spindles run in nylon bushes.
- These dampers are designed to fit inside the unit base and to be positioned on the roof curb before fitting the roof unit.
- The curb surface must be flat to permit an airtight seal.
- These are supplied as standard for twin fan units, for which they are an essential item, to ensure there is no short-circuiting of the airstream.
- They are an optional extra for single fan units.
- The pressure loss through the dampers must be added to the system resistance before selecting the fan.