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VENTILATION ENGINEERING TOOL

Fresh-Air Calculator

Use a current ventilation reference to confirm the governing method, then combine verified outdoor-air rates per person and per floor area into a quick zone airflow requirement where that arithmetic is applicable.

Free calculator — authorized account required

Create or sign in to your free professional account. Calculator access is activated only after the applicable Leal approval policy is satisfied; engineering method and reference content remain visible.

Scope and standards use

The reference selector helps identify the current governing family and method; it is not a substitute for the purchased standard, local code or authority requirement. Occupancy-rate tables are intentionally not reproduced. Verify the applicable edition, occupancy classification, rate values and any zone/system effectiveness or healthcare/residential provisions before using the result for design.

Fresh-Air Calculator | HVACR Studio by LEAL