Window Performance 4 – Dealing with Edge Losses

Subtitle:

Warm-edge glazing spacers and high-performance windows

Images:

[![][1]][2]

[![][3]][2]

Over the last three weeks I've focused on the major strategies for [improving the energy performance of windows][4]: adding extra layers of glass, increasing the thickness of the airspace between the layers of glass, adding low-emissivityAmount of heat radiation emitted from a particular body or material. Emissivity is expressed in a fraction or ratio, with the lowest values indicating low emissivity and the highest indicating the high emissivity of flat black surfaces. coatings, and replacing air with a low-conductivity gas fill. These strategies all help to reduce heat flow through an insulating glass unit (IGU), and if we do a really good job with these strategies we can achieve center-of-glass R-values of R-5 or higher.

[1]: http://www.greenbuildingadvisor.com/sites/default/files/imagecache/blog-river/Glassonweb.com_278_Triseal2(1).jpg (Schematic of Edgetech Super Spacer)
[2]: http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/window-performance-4-dealing-edge-losses
[3]: http://www.greenbuildingadvisor.com/sites/default/files/imagecache/blog-river/WindowNation_WarmEdge.gif (Comparing different glazing spacers)
[4]: http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions

URL: http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/window-performance-4-dealing-edge-losses