Windows and doors according to its position is divided into different retaining structures or separate components, there are different design requirements to have heat preservation, heat insulation, sound insulation, waterproof, fire prevention function, such as new requirements and energy saving, cold areas by the door gap and the heat loss, about 25% of the total heating heat consumption. Doors and Windows sealing requirements, is the important content in the energy-saving design. Door and window is an important part of building palisade structure system. Part 2: door and window is an important part of architectural modeling (false or true contrast, rhythm art effect, plays an important role) so their shape, size, scale, arrangement, colour and modelling on building overall modelling is very big effect.

Windows and doors according to its position is divided into different retaining structures or separate components, there are different design requirements to have heat preservation, heat insulation, sound insulation, waterproof, fire prevention function, such as new requirements and energy saving, cold areas by the door gap and the heat loss, about 25% of the total heating heat consumption. Doors and Windows sealing requirements, is the important content in the energy-saving design. Door and window is an important part of building palisade structure system.