Homeless and Housing Resource Network (HHRN) HHRN is the SAMHSA training and technical assistance center that shares knowledge and best practices for preventing and ending homelessness. Audiences include grantees; homeless, housing, and service providers; consumers; policymakers; researchers; and public agencies at federal, state, and local levels. These efforts reflect SAMHSA’s vision of ending homelessness by supporting individuals through a process of change as they improve their health and wellness, live a selfdirected life, and strive to reach their full potential. Homelessness Programs and Resources website.