Location & Design Conditions
Location Preset
Outdoor Temp (summer) To35 °C
Indoor Setpoint Ti26 °C
Room Geometry
Floor Area A_floor50 m²
Ceiling Height h2.8 m
Envelope (U-values)
Wall U-value1.5 W/m²K
Roof U-value0.8 W/m²K
Window-to-Wall Ratio30 %
Glass U-value2.8 W/m²K
SHGC (Solar Heat Gain Coeff.)0.50
Internal Gains
Occupants5
Lighting Density10 W/m²
Equipment Density15 W/m²
Ventilation Rate1.0 ACH
COP (System Efficiency)3.5
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Sensible Load [kW]
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Latent Load [kW]
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Total Load [kW]
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SHR (Sensible Heat Ratio)
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Recommended AC [kW]
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Annual Energy [kWh]
Load Breakdown
Monthly Load Estimate
Thermal Load Equations
Sensible cooling load:
$$Q_{sens} = \underbrace{(U_w A_w + U_r A_r + U_g A_g)\Delta T}_{\text{transmission}} + \underbrace{I \cdot A_g \cdot SHGC}_{\text{solar}} + \underbrace{Q_{light}+Q_{equip}+Q_{people,s}}_{\text{internal}} + \underbrace{\dot{V}\rho c_p\Delta T}_{\text{ventilation}}$$Latent load: $Q_{lat} = \dot{V}\rho\lambda\Delta W$ (ventilation + occupants)
SHR: $SHR = Q_{sens}/(Q_{sens}+Q_{lat})$
Annual energy: $E = Q_{tot} \times FLH / COP$ (FLH ≈ 700 full-load hours/yr)
Engineering Use: Preliminary HVAC sizing before detailed energy simulation (EnergyPlus, TRNSYS, IES VE). Results support ASHRAE 90.1 and ISO 52016 compliance checks.