The average hvac salary at Killeen Isd was $35,779 , which is 36 percent lower than the average salary for this job in Texas, and 36 percent lower than the national average for this job . Hvac salaries at Killeen Isd typically range from $29,008 to $44,034 (25th to 75th percentile). The highest reported hvac salary was $57,804. There are 18 employees at Killeen Isd with the job title hvac.