- 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 Pressure Relief Damper
3290 Lien St
Rapid City, SD 57702
2111 N Louise Cir
Sioux Falls, SD 57107