IWA 0768 Air Conditioning Duct Calculator

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Country of manufacture: Germany,            Date of manufacture: ____
Overall length: 30.0 cm,          Width: 4.0 cm,          Weight: 55.6 gms
Materials: all plastic, closed body simplex type
Cursor: 4.0 X 4.6 X 0.4 cms; all plastic, slightly magnifying; lines = Two hairlines and scale on front
Scales: 10, specialized (scale letters do not correspond to the usual; slide rule conventions)
Front: D (mm), F (m²), b (mm) [ a (mm), R (mmWS/m), P_dyn (mmWS), w (m/s) ] V (m³/h), Vs (m³/s), V-R (m³/h)
Back: Instructions for use in German
Back of slide: blank
Condition: C4 (minimal signs of use)
Came with: Original gray plastic slipcase

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