Model : PRO - NVAV Specifications : Constructed from galvanized steel sheetG90, with a thickness of(gauge 22). Used in variable speed fan HVAC systems. Fiber Glass with a thickness of(25 mm)and a density of(24 Kg/m³)for noise absorption. Perforated sheet to cover the fiberglass and to reduce the airflow turbulence, with a thick-ness of(0.8 mm),(5 mm)perforation diameter and a(3mm)pitch. Heater can be added to the VAV unit upon request. Calibration is done in factory to the VAV upon the required maximum flow. Siemens GDB181.1E actuator is used to modulate the blade position to control the airflow. Siemens RDG400 room thermostat is used to measure room temperature and to providethe control circuit with the desired temperature and the actual temperature.