The patented AL3 airflow measuring louver combines the functions of an outside air intake louver and an airflow measuring station in one assembly. Its 4 in. (102 mm) nominal depth requires less installation space than separate louvers and air measurement devices. The AL3 features a wind-driven-rain-resistant louver that allows high airflow with minimal water penetration and pressure drop. It is particularly well suited for applications in air handling units as well as air plenum wall installations.
The AL6 airflow measuring louver combines the functions of an outside air intake louver and an airflow measuring station in one assembly. Its 7 in. (178 mm) nominal depth requires less installation space than separate louvers and air measurement devices. The AL6 features a wind-driven-rain-resistant louver that allows high airflow with minimal water penetration and pressure drop. It is particularly well suited for applications in air handling units as well as air plenum wall installations. The AL6 has been tested to Air Movement and Control Association International, Inc. (AMCA) Standard 611-95.