ABSTRACT?The loads toolkit represents the third element of TC 4.7??s toolkit trilogy. Following the primary and secondary system toolkits@ it represents an important step in making computer technology available to a broader segment ofASHRAE engineers. One common characteristic of engineers is that they like to see and know how things work. This is why they generally are skeptical of black box calculation programs and why the toolkits are important. They make the underlyingphysics of the processes used in load and energy calculation procedures open and available for inspection and understanding.This paper describes the toolkit components and the their organization on the CD format being distributed by ASHRAE.