HVACopediaWalk-in cooler / freezer load
Wall, door-air, product and extra heat loads; suggested capacity.
Good to know
- This is a sizing estimate for light-commercial boxes. Use the equipment maker’s tables for the final selection.
- Typical walk-in coolers run 35–38 °F; freezers 0 to -10 °F.
- Heavy door use, very warm rooms and dark roofs in the sun each push the load up quickly.
More refrigeration calculators
Superheat (fixed orifice / cap tube)Actual superheat and the target from the outdoor and indoor temperaturesSubcooling (TXV systems)Subcooling from the head pressure and the liquid line tempRecovery cylinder max fillThe 80% rule: how much refrigerant a cylinder may holdVacuum pump sizePump size and vacuum targets by system sizeVacuum decay testLeak or moisture? Read the micron rise after isolating the pumpDefrost heater energykWh and heat added per day from the defrost cycles
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Calculation aids and reference figures for licensed technicians. Always follow the manufacturer’s data plate and manual for the exact model, and local codes. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Pressures are typical saturation values and change with load and airflow.