CFM per Ton

Standard 400 CFM per ton with humidity adjustments.

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Details, formula, and sources

Standard 400 CFM per ton for cooling (12000 BTU/hr per ton). Adjusted to 350 CFM per ton in high-humidity climates and 450 CFM per ton in dry climates per ACCA Manual S 2nd ed. guidance.

ACCA Manual S, 2nd edition by name.

ACCA Manual S licensed; principles free in published engineering texts.

Estimate. AHJ and licensed mechanical contractor govern. ACCA Manual J / D / S supersede rules of thumb.

Field names used by the API: tons, climate, total_cfm

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