Rectangular To Round Duct Formula + Chart

Rectangular To Round Duct Transformation formula

If you want to replace rectangular ducts with round ducts, you will have to use the rectangular to round duct formula. This formula determines the needed round duct diameter you need to match the rectangular duct airflow. In HVAC, this is known as equivalent diameter. You will need a sufficient diameter of round ducts to … Read more

Duct Velocity Calculator: Air Velocity = Airflow / Duct Area

In HVAC, it’s sometimes useful to calculate the velocity of air in the ducts. All central air conditioners, for example, require ductwork with the specified size of ducts and airflow (measured in CFM). To calculate the speed of air in the ducts, we use a duct velocity calculation (you can find the calculator below). Let’s … Read more