An air changes per hour (ACH) calculator is a tool that helps determine the number of times the air in a space is replaced with fresh air per hour. This calculation is important for maintaining good indoor air quality and can be used to design and operate ventilation systems effectively. The ACH is calculated by dividing the volume of air in a space by the airflow rate in cubic feet per minute (CFM).
ACH calculators are important because they help ensure that indoor air quality meets ASHRAE standards and other regulatory requirements. They can also be used to troubleshoot ventilation problems and identify areas where improvements can be made. For example, if an ACH calculator determines that a space has a low ACH, it may indicate that the ventilation system is not providing enough fresh air. This could lead to problems such as poor air quality, occupant discomfort, and increased risk of airborne diseases.
