There are three distinct types of muscles: skeletal muscles, cardiac or heart muscles, and smooth (non-striated) muscles.
HVAC technicians are responsible for the installation, maintenance and repair of heating, ventilation and air conditioning (HVAC) systems. As an HVAC technician, your job duties may include inspecting existing systems and making recommendations intended to improve the efficiency and/or safety of that system's performance. HVAC-R techs may also work on refrigeration systems.
Jobs in HVAC. Those who successfully complete a HVAC tech program may find work doing: HVAC Installationsâ As new residential homes and commercials are constructed, theyâre in need of heating, ventilating, and cooling systems that are safe, reliable, and up to code.