The average hvac salary at Plano Isd was $50,190 , which is 10 percent lower than the average salary for this job in Texas, and 10 percent lower than the national average for this job . Hvac salaries at Plano Isd typically range from $45,656 to $56,784 (25th to 75th percentile). The highest reported hvac salary was $64,563. There are 14 employees at Plano Isd with the job title hvac.