There is a need for both increased knowledge and for effective solutions in the transition from linear to circular business models. Circular hubs are increasingly regarded by academia and policy makers as facilitators of circularity in industry. This paper investigates how a circular hub can better integrate circular economy principles into existing business models, through conducting case study research where we analyse 16 months of data about a circular hub, which appeared to effectively aid the participants both in the transition towards the circular utilization of resources and the pursuit of Sustainable Development Goals. The case is a circular hub for the reuse, repair, remanufacture and repurpose of furnishing in Norway. The findings of this paper include a framework for the assessment of the impact of circular hubs on existing business models, as well as the following facilitators: (i) organizing the circular hub as a learning factory for pupils and other stakeholders in collaboration with local schools, (ii) the municipality coordinating the learning factory, (iii) researchers ensuring that high-level concepts of circularity are explored by the stakeholders, and (iv) public financial support. Proposed avenues of future research include investigating the role of network action learning principles and methods in achieving higher circularity and hub maturity levels.