The average Lake County hvac salary was $71,806, which is 24 percent higher than the average salary for this job in Indiana, and 40 percent higher then the average salary for this job nationwide. Hvac salary in Lake County is usually between $53,766 and $89,845 (25th and 75th). The highest hvac salary in Lake County was $89,845. There are 4 employees in Lake County whose job title is hvac.