Where ΔT is the temperature difference between supply and return air (typically 20°F for cooling).
Velocity (FPM) = CFM / Area (ft²) . Add conditional formatting to highlight if velocity exceeds 1,500 FPM (noise risk) or 2,500 FPM (erosion risk). 4. Water Pipe Sizing (Hydronic Systems) For chilled or hot water systems, use: hvac design calculations excel
CFM = Sensible Heat Load (Btu/hr) / (1.08 * ΔT) Where ΔT is the temperature difference between supply
Below is a breakdown of the core HVAC calculations you can perform effectively in Excel, along with the logic to build them. Excel excels at handling the repetitive yet formulaic nature of heat gain calculations. The most common manual method is the CLTD/CLF/SCL (Cooling Load Temperature Difference / Cooling Load Factor / Solar Cooling Load) method. 500 FPM (noise risk) or 2