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1. Advise builder of damper location and direction of airflow.

2. Damper should be laid on a 3mm to 4mm thick mortar bed to ensure airtight seal. Intumescent slats shall be in the VERTICAL position. NOTE: "AIRFLOW" direction is optional.

3. Complete brickwork around and over the damper, filling gap between brickwork and damper with a thin layer of mortar.

4. Connect ductwork to fire damper using fire rated mastic to fill recess if using raw edge connection, or apply mastic to both surfaces of the TDF flange connections. (Bolts must be of a low melting point material.)