Ventilation Rate Calculator

Calculate outdoor air ventilation requirements per ASHRAE 62.1, EN 16798, and CIBSE Guide B. Add spaces with occupancy and area data, and get L/s, CFM, and ACH results with project-level summaries.

ASHRAE 62.1 · EN 16798 · CIBSE Guide B

Project Settings

Standard

Method: Ventilation Rate Procedure

Total = Rp × Occupants + Ra × Area

Space 1: New Space

Name

Space Type

Floor Area (m²)

Ceiling Height (m)

Occupants