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ESP Calculation #HVAC: Five easy steps to estimate External Static Pressure drop in HVAC Ducts using Equal Friction Method. Any feedback is greatly appreciated. 068 Btuh Humidification = CFM x (Gr f‐Gr i) / 1,555 lbs/hr CFM = l/s x 2. With the easy parameter calculator contained on the summary page, you can keep historical records of the project you bid. The specific thermal load can be decided with a complete heat load analysis. Electrical Design Software. 125, and so on. The simplicity and unique compactness allows the design engineer to input, change and manipulate multiple HVAC load variations which can be altered and adjusted on the spot with the output immediately available on screen. When calculating the return on energy efficiency investments, consider the value of increased occupant comfort in energy-efficient buildings in addition to the financial savings. Hvac Load Calculation Spreadsheet 2018 Excel Spreadsheet Spreadsheet Templates. 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