3 calculators in this category
- Room CFM Requirement CalculatorACCA Manual D room airflowThe airflow a room needs follows from one equation: sensible load divided by 1.08 times the temperature difference between the…
- CFM per Ton CalculatorAHRI 210/240 rated airflow basisCFM per ton is the field measurement that tells you whether a cooling system is moving enough air to reach its rated capacity…
- Air Changes Per Hour (ACH) CalculatorASHRAE 62.1 / 62.2 ventilationAir changes per hour is airflow expressed as multiples of the room's own volume: 6 ACH means the fan moves six times the room's…
Which one do you need?
- Room CFM Requirement Calculator
- Calculate the supply airflow a room needs from its sensible load and supply air temperature difference, with altitude correction, register count and ACH.
- CFM per Ton Calculator
- Check measured system airflow against nominal capacity in CFM per ton, compare it with the 350 to 450 target band, and see the surplus or deficit in CFM.
- Air Changes Per Hour (ACH) Calculator
- Convert airflow to air changes per hour for any room volume, size an exhaust or ventilation fan to a target ACH, and see the minutes per complete change.