The average hvac salary at Conroe Isd was $52,755 , which is 5 percent lower than the average salary for this job in Texas, and 5 percent lower than the national average for this job . Hvac salaries at Conroe Isd typically range from $52,242 to $60,823 (25th to 75th percentile). The highest reported hvac salary was $68,758. There are 23 employees at Conroe Isd with the job title hvac.