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step three: Select frame type.
BAR THICKNESS AFFECTS AIRFLOW AND QUANTITY OF BARS PER OPENING. PLEASE ROLLOVER GRILLE TO SEE DRAWINGS FOR EXAMPLES.
PERFORATED
step ONE:

GRACE 001
step TWO:

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THE i FRAME IS USED FOR AN INSET APPLICATION WHERE THE GRILLE IS FLUSH WITH THE SURROUNDING SURFACE.
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THE CORE CAN BE FIXED OR REMOVABLE.
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THE F FRAME IS FOR A OVERLAY APPLICATION WHERE A FLANGE AND FIXED CORE IS DESIRED.
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IF THERE A EXSISTING OPENING AND NO FRAME IS REQUIRED, SELECT THIS OPTION.
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