Combination Stationary 4″ Outside Air Louver with Opposed Blade Air Control Damper
4500-3000OBD
Dampers and louvers can be combined with a 20 gauge steel sleeve to create an environment to regulate airflow in or out of a louver with an operable blade damper.
Combination Stationary 4″ Outside Air Louver with Parallel Blade Air Control Damper
4500-3000P
Dampers and louvers can be combined with a 20 gauge steel sleeve to create an environment to regulate airflow in or out of a louver with an operable blade damper.
Combination Stationary 4″ Outside Air Louver with Vertical Mount Pressure Relief Damper
4500-3510
Dampers and louvers can be combined with a 20 gauge steel sleeve to create an environment to regulate airflow in or out of a louver with an operable blade damper.
Combination Stationary 4″ Outside Air Louver with Vertical Mount Backdraft Damper
4500-3550
Dampers and louvers can be combined with a 20 gauge steel sleeve to create an environment to regulate airflow in or out of a louver with an operable blade damper.
Combination Stationary 4″ Drainable Outside Air Louver with Opposed Blade Air Control Damper
4525-3000OBD
Dampers and louvers can be combined with a 20 gauge steel sleeve to create an environment to regulate airflow in or out of a louver with an operable blade damper.
Combination Stationary 4″ Drainable Outside Air Louver with Parallel Blade Air Control Damper
4525-3000P
Dampers and louvers can be combined with a 20 gauge steel sleeve to create an environment to regulate airflow in or out of a louver with an operable blade damper.
