Can these bottle coolers be built-in under counters?

They are designed for under-counter/back-bar use, but they still need ventilation.

Treat most commercial under-counter bottle coolers as semi-built-in: they can sit under a counter run, but you should not box them in tightly.

Leave space for airflow around the cabinet and the condenser area and ensure grills are not obstructed.

If you are fitting into cabinetry, plan a route for warm air to escape (and easy access for cleaning the condenser).

Because clearance and airflow requirements can vary by model and install, use the specific installation manual for your exact BC-series model and confirm the counter design before ordering.

Read the full guide: Unifrost Under-Counter Bottle Coolers: A Comprehensive Guide.