Minnesota State Live Helpdesk. Student IT Helpdesk ON Technical programs to choose from, find something that sparks your interest! Technical Programs Browse our list of accredited nursing schools in Duluth, MN, and Superior, WI. Licensed Practical/Vocational Nurse Training - Certificates and Diplomas Duluth This guide provides an overview the HVAC industry in Minnesota, including salary expectations, various training programs, and the required credentials. Duluth, MN (160 HVAC workers employed): $58,700 annual average salary in HVAC and refrigeration through Dakota County Technical College of Rosemount.