: Rows to input the length and dimensions of the "index run" (the path with the highest pressure drop). It calculates pressure loss per 100 feet based on air velocity and duct material. Fitting Losses
: The final calculated ESP is then compared against the Blower Performance Data provided by the manufacturer. If the calculated ESP exceeds the blower's rated capacity at the required CFM (Cubic Feet per Minute), the system will underperform, leading to poor air distribution and potential equipment failure. esp calculation hvac excel sheet
| Component | Qty | PD per Unit (in.w.g.) | Total PD | | :--- | :--- | :--- | :--- | | | | | | | 50 ft rigid duct | 1 | 0.10 | 0.10 | | (4) 90° elbows | 4 | 0.07 | 0.28 | | Supply diffuser | 2 | 0.08 | 0.16 | | Return Side | | | | | 30 ft flexible duct | 1 | 0.15 | 0.15 | | Return grille | 1 | 0.06 | 0.06 | | MERV 8 filter | 1 | 0.18 | 0.18 | | Subtotals | | | | | Supply Total | | | 0.54 | | Return Total | | | 0.39 | | Calculated ESP | | | 0.93 in.w.g. | | +15% Safety Factor | | | 1.07 in.w.g. | : Rows to input the length and dimensions
Several (e.g., MeasureQuick, Fieldpiece). However, Excel remains the most flexible for custom engineering. If the calculated ESP exceeds the blower's rated