"Louver" is a patented (US Patent No. 5,650,875 dated Jul. 22, 1997) member of the "Ecology Sun System"(ECOSS) family of sunlight modulating products developed by Figla Co., Ltd. of Tokyo, Japan. "Louver" is used primarily for sun shading.

"Louver" is a panel inserted into the glass unit's airspace and made up of horizontal 12mm deep aluminum-made louvers. The louvers are supported by vertical plastic dividers (or holders). A typical "Louver" application might be to provide shading for a building's south facing glass subject to significant unwanted solar gains from the noonday sun. The accompanying photos show just such an application of "Louver" to the vertical and horizontal glazing of the central skylight at the Telecom Center in Tokyo, Japan, completed on January, 1996.

Viewed from the inside, "Louver" is, unlike ECOSS W,T or D, fully transparent at certain viewing angles giving the occupants a chance to see the sky or landscape. Because the louver is inside the glass, the heavy maintenance typically associated with Internal and external shading devices is avoided entirely.

"Louver" panels can be designed to fit into almost any window configuration imaginable. Computer simulation by Figla allow the architect to determine precise louver angle and pitch required by the job. The louvers can also be painted to alter the color of the transmitted light.

• ECOSS-W
• ECOSS-T
• ECOSS-D
• ECOSS-Honeycomb
• ECOSS-Louver