# cfm

CEFR C1 · Noun

Source: https://englishreference.com/word/cfm
Updated: 2026-05-30

## Definition

a unit used to measure how much air or gas moves through a space in one minute. You often see this when talking about fans or heating systems.

For teachers: a unit of measurement for the volume of air or gas flow, representing cubic feet per minute. Commonly used in HVAC and industrial ventilation contexts.

## Examples

- The fan provides 500 cfm of airflow.
- To ensure proper ventilation in the workshop, the system must provide at least 1000 cfm of fresh air.
- Engineers calculated the required cfm to maintain a safe working environment, factoring in the heat generated by the machinery and the number of occupants in the space.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.