Enter the airflow (CFM) and velocity (FPM) values. Choose the shape of your duct—round or rectangular—and enter the appropriate dimensions (diameter for round or width/height for rectangular). Add details about friction rate, duct length, number of elbows, and elbow type.
Once all inputs are entered, click the “Calculate” button. The calculator will process the data and display the results for duct area, velocity, dimensions, equivalent length, and pressure drop.
The results will appear in the fields, showing you important values for your HVAC system. Use this information to ensure proper duct sizing, airflow, and efficiency for your design.
You can input the airflow (CFM) and velocity (FPM) values into the calculator, and it will automatically calculate the area and velocity for your duct. The tool also lets you calculate the equivalent length and pressure drop based on your inputted friction rate and duct dimensions.
Yes! The calculator allows you to choose between round or rectangular ducts. Once you select the duct shape, it adjusts the input fields accordingly, allowing you to enter the appropriate dimensions (diameter for round ducts and width/height for rectangular ducts).
The friction rate represents the resistance to airflow in your duct system. This value is essential for calculating the pressure drop across the ductwork. It is used in combination with duct length and number of elbows to determine the total pressure drop, ensuring your HVAC system operates efficiently.
Enter the number of elbows and choose the elbow type (90-degree, 45-degree, or long radius) from the dropdown menu. The calculator will factor in the equivalent length of each elbow to give you an accurate total pressure drop for the system.
Absolutely! The calculator allows you to input your own values for airflow and velocity. This flexibility makes it easy to customize the results based on your specific HVAC system’s requirements.