Negative-air / scrubber sizing

Air changes per hour.

Sizes air scrubbers for a containment from room volume and target air changes per hour. CFM = volume × ACH / 60.

Inputs

Room length (ft)

Room width (ft)

Ceiling height (ft)

Air changes per hour

Scrubber capacity (CFM)

Enter values above to calculate.

Sizing guide — verify against IICRC S520 / carrier guidelines and equipment ratings.