How to read a commercial refrigerator spec sheet

Dimensions and access

External dimensions are usually given as width × depth × height in millimetres. Check whether depth includes handles, the compressor housing and the door when open, and whether height includes castors or legs. Then compare with the narrowest point on the way in: the shop shutter, a doorway, a staircase turn or the lift.

Look for the clearances the manufacturer requires around the unit for ventilation. A cabinet that fits the gap exactly but needs 100 mm behind and above it does not actually fit.

Capacity: gross, net and usable

Gross volume is the total space inside the liner. Net or storage volume deducts the space taken by the evaporator, fans and internal fittings. Usable space is smaller still, because air must circulate around stock. Two cabinets with the same gross litres can hold quite different amounts of your actual product.

The more useful numbers are shelf count, shelf dimensions, clear height between shelves and the load each shelf is rated for. If you use GN pans, trays or crates, ask how many fit per shelf.

Temperature range and ambient rating

The temperature range tells you the setpoints the controller allows, not the conditions under which the cabinet can hold them. The figure that matters is the ambient condition the performance was tested at. Household appliances use climate classes from IEC 62552, where class T covers rooms up to 43 °C. Retail display cabinets are tested under climate classes defined in ISO 23953, each naming a test-room temperature and humidity. Commercial storage cabinets may state a maximum ambient directly.

If the sheet only says 'climate class' without numbers, ask what temperature and humidity that means. A rating suited to an air-conditioned mall will not reflect a kitchen beside a tandoor.

The refrigeration system

Electrical data

• Supply: in India most commercial cabinets run on 230 V single-phase, 50 Hz. Check the voltage tolerance the unit accepts.
• Rated current or power: helps size sockets, wiring, UPS and generator capacity. Remember that compressors draw a higher current for a moment when starting.
• Plug type: confirm it matches your sockets; avoid adaptors and extension boards for compressors.
• Stabiliser: if the sheet or manual recommends one, add it to your budget.

Energy consumption

Energy is usually given in kWh per 24 hours under a test standard, with fixed door openings, room temperature and load. Your real consumption will be higher in a hot room with frequent openings. The number is still useful for comparing two cabinets tested under the same standard, but not for comparing a figure from one standard with a figure from another.

Where a BEE star label applies, use it to compare similar products. To estimate running cost, multiply daily kWh by your tariff and by 365, then allow a margin for real-world conditions.

What spec sheets often leave out

• Pull-down time with a full load.
• Recovery time after door openings.
• Steel grade of the interior and exterior.
• Insulation thickness and type.
• Noise level, which matters in open kitchens and front-of-house.
• Service access, spare-parts availability and warranty terms.