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.
You should be able to diagnose defects and complete installation of new parts if necessary. HVAC Technicians also have to have knowledge of and the ability to operate specialized machinery, equipment and tools to complete repairs and install parts. At times travel may be part of the job of an HVAC technician. Some jobs may be completed in your local area, however others may be some distance away. This will depend on the employer and their customers.