Calculate A/C condenser heat rejection capacity based on refrigerant conditions, airflow, and ambient temperature.
Input Parameters
Results
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Total Heat Rejection
BTU/hr
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Min Condenser Area
sq ft
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Refrigerant Flow
lb/hr
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Est. Subcooling
°F
Note: Condenser rejects evaporator heat PLUS compressor work heat. Typical condenser temp is 25-35°F above ambient. Debris on condenser reduces capacity significantly.
Reference
Total Rejection = Evap Capacity + Compressor Heat
Compressor Heat = Power(W) × 3.412
Condenser Area = Total / (U × ΔT_air)
U varies with air velocity (15-25 BTU/hr·ft²·°F)
Refrigerant Flow ≈ Capacity / 80