An air modifications per hour (ACH) calculator is a software that helps decide the variety of instances the air in an area is changed with recent air per hour. This calculation is essential for sustaining good indoor air high quality and can be utilized to design and function air flow programs successfully. The ACH is calculated by dividing the amount of air in an area by the airflow fee in cubic ft per minute (CFM).
ACH calculators are essential as a result of they assist be sure that indoor air high quality meets ASHRAE requirements and different regulatory necessities. They can be used to troubleshoot air flow issues and determine areas the place enhancements may be made. For instance, if an ACH calculator determines {that a} house has a low ACH, it could point out that the air flow system isn’t offering sufficient recent air. This might result in issues akin to poor air high quality, occupant discomfort, and elevated threat of airborne ailments.