📥 Free HVAC Resource: ESP Calculation Excel Sheet – No More Guessing on Duct Static Pressure
Every elbow, tee, or transition adds resistance equivalent to a certain length of straight pipe. An Excel sheet should include a lookup table for these values (e.g., a 90-degree radius elbow might equal 15 feet of straight duct). 4. Friction Rate (in. w.c. per 100 ft) esp calculation hvac excel sheet