Heating and cooling system mechanics need knowledge in the following areas:

• Mechanical: The design, use, and repair of machines and tools.
• Building and Construction: The tools and methods used to construct buildings, roads, and other structures.
• Customer and Personal Service: Providing special services to customers based on their needs.
• Engineering and Technology: How to use computers and rules of engineering to design and produce goods and services.
• Computers and Electronics: Computer hardware and software.
• English Language: The meaning and use of the English language.
• Public Safety and Security: How to protect people and property.
• Design: Making and using plans, blueprints, drawings, and models.
• Physics: The features and laws of matter and energy.
• Mathematics: The rules and uses of numbers.
• Administration and Management: How to run a business or group.
• Education and Training: The methods of teaching and learning.