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The first of the cooling load factors used in this method is the CLTD, or the Cooling Load Temperature Difference. This factor is used to represent the temperature difference between indoor and outdoor air with the inclusion of the heating effects of [[solar radiation]]. <ref name=Textbook> McQuiston, Faye C., Parker, Jerald D., Spitler, Jeffrey D. Heating, Ventilation, and Air Conditioning: Analysis and Design, p216-278. 2005, John Wiley and Sons, Inc.</ref> <ref name=SML/>
The second factor is the CLF, or the Cooling Load Factor. This coefficient accounts for the time lag between the outdoor and indoor temperature peaks. Depending on the properties of the building envelope, a delay is present when observing the amount of heat being transferred inside from the outdoors. The CLF is the cooling load at a given time compared to the heat gain from earlier in the day. <ref name=Textbook/> <ref name=SML/>
The SC, or [[Shading coefficient]], is used widely in the evaluation of heat gain through glass and windows. <ref name=Textbook/> <ref name=SML/>
Finally, the SCL, or Solar Cooling Load Factor, accounts for the variables associated with solar heat load. These include the global coordinates of the site and the size of the structure. <ref name=Textbook/> <ref name=SML/>
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