Input target FR (e.g., 0.1 in.w.c./100ft). Excel solves for duct diameter:
Diameter_in = ( (0.00011136 * CFM^1.9) / (FR * 100) )^(1/5.02)
Link the ESP output to a fan selection sheet or equipment schedule. esp calculation hvac excel sheet
You can download pre-made templates, but building your own ensures you understand every input. Here is the recommended structure. Input target FR (e