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.
For example the median expected annual pay for a typical HVAC Mechanic I in the United States is $42,649, so 50% of the people who perform the job of HVAC Mechanic I in the United States are expected to make less than $42,649. Percentile.