The following is a breakdown of components that make up the gains in the CIBSE Heat Gain Calculation.
•Solar LoadThis is the direct and diffuse solar loads through glazed components (windows\rooflights)
•Fabric LoadThis is the sensible load from fabric components (walls, floors, roofs etc)
•Convective Load This is the sensible load from infiltration. It also includes any fresh air or conditioned air introduced locally to the room
•Latent Load This is the latent load from people, equipment and infiltration.
•Casual LoadThis is the sensible load from people, lighting and equipment.