Cabin CO₂ - Time to Threshold

Time to reach a CO₂ threshold in an occupied cabin with limited ventilation - the sizing logic for fresh-air make-up.

HVACCO2Comfort

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

c_{ss} = c_{out} + \frac{N \cdot q_{CO_2}}{\dot V_{fresh}}

Symbol	Meaning	Unit
$q_{CO_2}$	CO₂ generation rate per person	L/h
$\dot V_{fresh}$	Fresh-air flow	m³/h

Source: ASHRAE 62.1

Time to reach a CO\u2082 threshold in an occupied cabin with limited ventilation - the sizing logic for fresh-air make-up.