The Loads simulation module calculates the sensible and latent components of the hourly heating or cooling load for each user-designated space in the building, assuming that each space is kept at a constant user-specified temperature.  This module is responsive to weather and solar conditions, to schedules of people, lighting and equipment, to infiltration, to heat transfer through walls, roofs, and windows and to the effect of building shades on solar radiation. 

Loads are determined using primarily the algorithms described in "Procedure for Determining Heating and Cooling Loads for Computerizing Energy Calculations, Algorithms for Building Heat Transfer Subroutines," available from the American Society of Heating, Refrigerating, and Air Conditioning Engineers, Inc. (ASHRAE).