Event Hubs dedicated tier offers single-tenant deployments of Event Hubs for customers with the most demanding mission critical workloads. Event Hubs dedicated clusters can handle streaming workloads up to GB/s scale and run them with complete workload isolation and consistent low latency.

The dedicated tier offers self-serve scaling capabilities that allow you to adjust the capacity of the cluster according to dynamic loads and to facilitate business operations.

If you are using Event Hubs clusters with self-scaling option disabled, then you can create a 1 CU cluster in select regions. To scale these cluster you have to contact Event Hubs support.