The following terms are used in this manual:
Element - a wall, partition, ceiling, roof, floor, door, window or rooflight.
Opening - a door, window or rooflight.
Non-opening element - a wall, partition, ceiling, roof or floor.
Glazing opening - a window or rooflight.
Environment-exposed element - an element exposed to the external environment.
Link-exposed element - an element linking to the external environment or the ground via one or more unheated spaces.
Exposed element - an environment-exposed or link-exposed element.
Earth-contact element - an element in contact with the ground.
Heat-loss element - an exposed or earth-contact element bounding a heated space.
Solar-exposed glazing opening - a glazing opening that is environment-exposed or links to a glazing cavity (does not include glazing openings linking to other types of unheated space),
Roof - an environment-exposed non-opening element with a slope less than 70 degrees, or a link-exposed ceiling, or any link-exposed element adjacent to a room of type ‘Unheated space with pitched roof and insulation between joists/rafters’.
Rooflight - an environment-exposed glazing opening with a slope less than 70 degrees or a link-exposed ceiling window, or any link-exposed glazing element adjacent to a room of type ‘Unheated space with pitched roof and insulation between joists/rafters’.
