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.
Job Description for Air Conditioning (AC) Technician. An air conditioning (AC) technician is a person typically employed by a company that specializes in heating, ventilation, and air conditioning (HVAC) processes. This technician works to install, maintain, and repair air conditioning equipment in commercial and residential buildings.