This document provides instructions for using the Hourly Analysis Program (HAP) to estimate cooling loads. It describes how to create a new project and enter weather data for Cairo, Egypt. It then explains how to enter space data like dimensions, internal loads from lighting, equipment and occupants, and building envelope details. Finally, it outlines how to define an air handling system with components like fans, ducting and thermostats to serve the defined space. The document guides the user through the full HAP workflow to model a sample space and generate output reports for analysis.