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What HVAC jobs do

HVACR mechanics and installers work on heating, ventilation, cooling, and refrigeration systems. ensure that heating and air conditioning systems are functioning properly to control temperature, humidity, and overall air quality within a building. Some HVAC technicians specialize in one or more aspects of heating, ventilation, air conditioning, and refrigeration (HVACR), such as radiant heating, commercial refrigeration in places like grocery stores, hotels, and restaurants, and regular maintenance of heating and cooling systems.

Work Environment
Heating, ventilation, air conditioning and refrigeration mechanics and installers (HVAC technicians) work in a variety of settings, including: inside and outside homes, schools, hospitals, shopping malls and other buildings. Work environments vary depending on customer requirements. Typically technicians may be assigned to one or more work locations at the beginning of the workday. They then travel to each work location to provide service.

How Do I Become an HVAC/R Technician?

First, it is recommended that you have a high school diploma or high school equivalency (GED), although some people enter the industry with less education, and once they enter the industry, they usually need long-term on-the-job training to be competent. HVAC technicians may need to be licensed or certified.

Second, regarding HVAC certification, heating, ventilation, air conditioning/refrigeration (HVAC/R) technicians need to start as an apprentice and gain experience before they can obtain a license. Some technicians are trained through apprenticeship programs,During the apprenticeship, technicians will learn topics such as safety regulations, blueprint reading, and heating and cooling systems.

Source：https://www.bls.gov/ooh/installation-maintenance-and-repair/heating-air-conditioning-and-refrigeration-mechanics-and-installers.htm#tab-2