12"w X 18"h Aluminum Adjustable Return/Supply HVAC Air Grille - FULL CONTROL HORIZONTAL AIRFLOW DIRECTION sidewall Design – Unrestricted airflow for 4 X 12 Is CRFG2028 Width_14in

Design – Unrestricted airflow for your HVAC system - adjustable one-way louver with full horizontal airflow directional control - single deflection supply grill with 96% airflow - noise free components - no vibrating louvers etc

actual front end outer dimensions are 11

3/4" - 2981 PSI

but you will appreciate the benefits over the period of time

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12"w X 18"h Aluminum Adjustable Return Supply HVAC Air Grille FULL CONTROL HORIZONTAL AIRFLOW DIRECTION sidewall Design – Unrestricted airflow for 4 X 12 Is CRFG2028 Width_14in Design – Unrestricted airflow for your HVAC system adjustable one way louver with full horizontal airflow directional control single deflection supply grill with 96% airflow noise free components no vibrating louvers etc actual front end outer dimensions are 11