Duct Elbows Explained: Types, Radius, Pressure Loss & Efficiency Tips
Duct elbows are essential components in HVAC ductwork, allowing air to change direction while maintaining…
Duct Velocity Pressure, Standards and Calculations
When designing a duct system, the velocity of the air traveling inside the duct is…
Why 400 CFM per Ton? (Rule of Thumb Explained)
400 CFM per ton is regarded as the standard rule of thumb by many HVAC…
Duct Friction Loss Formula: How to Calculate Friction Loss in Ducts?
As an engineer, we are taught to size ducts based on a common friction loss…
Central Return vs Dedicated Return: An Unbiased Comparison
A centralized return or a dedicated return in every room are both viable ways to…
Return Duct Size for HVAC Unit (Sizing Chart & How-to Guide)
Return duct sizes are primarily depending on the airflow of the HVAC unit which is…
