Refrigeration 3 HVAC 9030 Email to a Friend Our Refrigeration 3 course teaches you about rooftop condensers, chillers, humidifiers, heat pumps, electronic and curtain air cleaning equipment, odour control, commercial air conditioning and troubleshooting. Prerequisite(s) You must have completed our HVAC 9058 Refrigeration 2 course. (An approved equivalent is also acceptable.) Contact Information 416-415-5000, ext. 4861 email@example.com Course Section(s) Available Class dates and registration for the upcoming fall term will be available on this website in July. Please visit this page again at that time. If you would like to receive an email notification when the fall term is released, complete our sign-up form. Some courses require you to purchase a textbook. The cost of the textbook is not included in the course fee unless otherwise indicated. If there is a textbook assigned for this course, it will be listed on the bookstore website.