The average hvac salary at Fort Bend Isd was $41,839 , which is 25 percent lower than the average salary for this job in Texas, and 25 percent lower than the national average for this job . Hvac salaries at Fort Bend Isd typically range from $26,051 to $47,773 (25th to 75th percentile). The highest reported hvac salary was $64,952. There are 13 employees at Fort Bend Isd with the job title hvac.