PERFORMANCE: Energy & Cost



The initial expense of windows is generally more than an equal area of opaque facade, but the need for or desirability of some type of window usually does not require justification—for the purpose of window is for light, view and natural ventilation. An important issue is defending additional cost to provide more windows or higher-performance windows. Yet, the operating energy and maintenance costs of the building usually outweigh the initial costs by a factor of about ten to one. Moreover, the expense of occupant salaries within the building is typically many times more than the operating costs. The window's initial cost drives many decisions, but it is small in comparison to other more critical features.

Since windows can have a significant impact on the operating costs, health, productivity and occupant well-being, a broadly focused life cycle analysis must be used. Such analysis must include monetary, environmental, and human impacts of building design choices. Durability is also a key issue in any life cycle analysis. Window frames, glazings, and sealants may have different useful lives. Yet, window systems are expected to last at least 20–30 years and they can often be much more expensive and difficult to replace than other building systems. Maintaining energy performance properties over the life of the window is an essential aspect of window durability.


Earless case design is very eye-catching, in general, high quality  uk Replica watches, look bright, popular style popular. JohnIsaac give this crazy sea water with the leather strap and folding buckle, while also providing another rubber strap as a backup Handbags Replica, and the appearance of the table is also very match. JohnIsaacRoughSea price is 1990 Replica Lv handbags francs and can be purchased through the website.Romain Jerome Space Invaders?Hermes Handbags In order to express their late 1970s video game ��Space Invaders�� tribute, Romaine Jerome introduced two limited edition UK Replica Handbags . Where a is color, another monochrome, each limited edition?Rolex replica watches?78.?Currently, users simply tap ever in the face of the?Replica Dior Handbags ?, or swipe card to access the application menu, the new update adds?mulberry Replica?��Home�� rights, individual interaction You can then replace the water feature.All through a series of taps �CReplica Rolex which (such as weather, notice or information and travel information), switch to a different state of information, using different face options, training data or open screen space, new activities will include bike-sharing.Finally, while also LG G?Hermes Replica Handbags?R, equipment, seemingly, it is excluded from the Andr oid after the previous update, the last of the Wi-Fi feature is enabled, updated benefits.

Facade Design Tool



Window Technologies

Case Studies

Tools & Resources