90-Degree Rectangular Duct Elbow Detail for HVAC Systems

This drawing depicts a standard 90-degree rectangular duct elbow used in HVAC ventilation systems. The elbow features a smooth inner radius curve to minimize pressure drop and turbulence at the bend point. The component appears to be a standard sheet metal fabrication with dimensions of approximately 700mm x 700mm, corresponding to typical medium-sized commercial ductwork. The design utilizes a proper radius-to-width ratio that helps maintain optimal airflow characteristics while transitioning direction. Notably, the drawing is organized on the specialized ОВИК (HVAC) layer, indicating its designation for mechanical systems documentation. The gentle radius of the inner curve suggests this fitting is designed for applications where air velocity and noise considerations are important; sharper turns would create more turbulence and system inefficiency.