Can it really be used as a refrigerator?

Yes. The digital control switches between freezer mode, roughly -11°F to 10°F, and refrigerator mode, roughly 35°F to 46°F. It is one cooling zone, so the whole cabinet changes temperature together.

Do I have to defrost it manually?

No. It is frost-free with fan-circulated cooling, so it handles defrost cycles itself. Keep the door seals clean and the door closed to keep it that way.

How much room does it need?

It is 28 inches wide and 61.5 inches tall, and the door needs about 58 inches of depth when open 90 degrees. Leave clearance behind and above for airflow, and check that doorways and stairs fit its height.

Is it quiet enough for a home office?

Whynter rates it at 45 dBA or less, which is moderate for a large appliance. Fan-circulated cooling means you will hear it cycle, so place it away from desks and bedrooms.

What comes in the box?

The freezer, four sliding cabinet shelves, four door shelves and a wire storage basket. It rolls on built-in casters, so no separate base is needed.

Is it suitable for commercial use?

Whynter lists it for commercial use as well as home use, and it is UL certified and Energy Star rated. Check your local rules for commercial kitchen equipment before relying on it.