Hvac - Calculation Excel Sheet 2021

Excel sheets have become a widely accepted tool for HVAC calculations due to their flexibility, ease of use, and widespread availability. Some benefits of using Excel sheets for HVAC calculations include:

| | Purpose | Key Inputs | Outputs | |----------------------|-------------|----------------|--------------| | Heat Load Calculation (Manual J / Cooling Load) | Determines required BTUs for cooling/heating | Room dimensions, orientation, occupants, windows, insulation, climate data | Total sensible & latent heat gain, recommended equipment capacity | | Duct Sizing (Equal Friction / Static Regain) | Sizes supply & return ducts | Airflow (CFM), duct material, available static pressure, length | Duct dimensions (round/rectangular), velocity, pressure drop | | Pipe Sizing (Chilled/Hot Water) | Sizes hydronic piping | Flow rate (GPM), pipe length, fittings, allowable friction loss | Pipe diameter, velocity, pressure loss | | Psychrometric Analysis | Plots air properties for mixed air, coil leaving conditions | Dry-bulb/wet-bulb temps, altitude | Relative humidity, enthalpy, humidity ratio, dew point | | Ventilation Calculator (ASHRAE 62.1) | Calculates required outdoor air | Occupancy, floor area, zone type, breathing zone airflow | Minimum outdoor airflow (CFM), system ventilation efficiency | | Fan Laws & Pump Affinity | Estimates performance at different speeds/rpm | Current RPM, CFM, static pressure, BHP | New CFM, pressure, power after speed change | hvac calculation excel sheet 2021

If you are auditing an Excel sheet from the 2021 era, check the methodology. Excel sheets have become a widely accepted tool