import type { VentilationRateInput, VentilationRateResult } from './types.js';
/**
 * Ventilation Rate Calculator (ASHRAE 62.1 / OSHA)
 *
 * Calculates required ventilation airflow based on room dimensions,
 * occupancy, space type, and activity level.
 *
 * @throws {RangeError} Room dimensions must be positive
 * @throws {RangeError} Occupants must be positive
 * @throws {RangeError} Custom ACH must be provided and positive for custom space type
 * @param input - room dimensions, occupants, space type
 * @returns ventilation requirements in multiple units
 */
export declare function ventilationRate(input: VentilationRateInput): VentilationRateResult;
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