Penn Foster College has an accredited HVAC Technician training program that can be taken online or via postal mail. The program includes all necessary books and equipment as well as basic information to take the EPA HVAC certification exam as well as unlimited phone support.
Charter College offers their Environmental Control Technology HVAC program with a focus on "green" technology and water processes. The program is available via postal mail or online training and can be completed at different paces based on the needs of the student.
AIS is an educational non-profit school that offers correspondence courses only (no online training). The student is provided with a textbook and training manual that covers the HVAC program. Tests are taken using the open book method. The average completion time for this course is 80 hours.