🌬️ HVAC & Ventilation
HVAC & Ventilation Calculators
Air flow, duct sizing, pressure loss, cooling load and ventilation rate calculations for HVAC systems design.
⚡ Quick answer
INDUGRID provides 5 free HVAC & Ventilation engineering calculators for professional use. Air flow, duct sizing, pressure loss, cooling load and ventilation rate calculations for HVAC systems design.
Required Air Flow Rate
Calculate the required ventilation air flow rate based on room volume and desired air changes per ho…
Q [m³/h] = V [m³] × ACH [1/h]
Duct Sizing (Equal Friction)
Size rectangular or circular HVAC ducts based on air flow rate and maximum allowable velocity or pre…
A = Q / v | D = √(4A/π) | ΔP/m = λ/D × (ρv²/2)
Cooling Load Estimation
Estimate total cooling load of a space considering solar gain, transmission, ventilation and interna…
Q_total = Q_solar + Q_transmission + Q_ventilation + Q_people + Q_equipment
Fan Power & System Curve
Calculate fan shaft power and electrical input power based on air flow, total pressure and fan/motor…
P_shaft = Q × ΔP_total / η_fan | P_elec = P_shaft / η_motor
Pipe Heat Loss (Insulation)
Calculate heat loss from insulated hot/cold water pipes. Useful for heating, cooling and process pip…
Q = 2π × λ × L × (T_pipe - T_amb) / ln(r_outer/r_inner)