The average hvac salary at Klein Isd was $46,824 , which is 16 percent lower than the average salary for this job in Texas, and 16 percent lower than the national average for this job . Hvac salaries at Klein Isd typically range from $36,684 to $53,724 (25th to 75th percentile). The highest reported hvac salary was $62,765. There are 19 employees at Klein Isd with the job title hvac.