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HVAC and Refrigeration References: Codes

What are the important references for studying? What references should I take into the exam?

ASHRAE standards are another common tool used by practicing professional HVAC engineers. However, the exam does not appear to be based on the latest version of the codes, since it is not referenced as a resource by NCEES. However, it is recommended at a minimum that the engineer in training be familiar with each of the following codes.

ASHRAE 15, Safety Standard for Refrigeration Systems

Often times the HVAC engineer will have to design a Refrigeration System and this system and this system must meet the requirements set forth in this standard. It also provides safety designations and classifications of refrigerants.

ASHRAE 55, Thermal Environmental Conditions for Human Occupancy

This standard provides the method and requirements for determining optimum thermal environmental conditions for human occupancy.


ASHRAE 62.1, Ventilation for Acceptable Indoor Air Quality

This standard provides the minimum ventilation requirements for indoor occupied spaces. This standard is used often by practicing engineers when determining outside air and exhaust air requirements for spaces, since many governing city, state and federal agencies require their projects to meet this standard.


ASHRAE 90.1, Energy Standard for Building Except Low-Rise Residential Buildings

This standard provides the minimum energy efficiency requirements for common HVAC equipment. This standard is used often by practicing engineers when selecting and modeling HVAC equipment, since many governing city, state and federal agencies require their projects to meet this standard.


NFAP 90A/90B

The National Fire Protection Agency provides codes and standards related to fire protection. The only recommended NFPA codes are those relating to HVAC systems. These codes are (1) NFPA 90A and 90B, which are titled the Standard for the Installation of Air Conditioning and Ventilating Systems and the Standard for the Installation of Warm Air Heating and Air Conditioning Systems



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