HVAC, or heating and air conditioning, is an essential part of many types of buildings and structures, including residential structures, large office buildings, hospitals, vehicles, and even marine environments. Its primary purpose is to regulate temperature and humidity in a building, using air from the outside to control indoor temperatures and humidity. It can be a simple mechanical system, or it can include a number of sophisticated features.

HVAC technicians need to undergo extensive training before they can work in the field. Training programs are available at community colleges and vocational schools. These programs are growing in number and are intended to meet the rising need for experienced HVAC professionals. They can range from six to 24 months in duration. Generally, entry-level HVAC technicians earn approximately half of a journeyman’s salary, but can earn much more as they gain experience.

Ventilation is essential for maintaining the quality of indoor air. Without proper ventilation, carbon dioxide and other gases can accumulate and damage the interior of a building. Proper ventilation allows fresh oxygenated air to flow through the building and removes contaminants. In addition to preventing the growth of mold, HVAC plays a vital role in maintaining indoor air quality.

HVAC technicians are trained at a number of trade schools in the Chicago area. Students may attend a day or night program to train for the HVAC-R field. Depending on the school, an HVAC technician can complete the program in 42 weeks.