• Louvers are rectangular glass windows enclosed in a metal framework. Individual glass panes can move flexibly to adjust the flow of air into a room. The natural air ventilation that louvers provide makes them popular in tropical climates around the world. Components are relatively inexpensive and easy to install and replace.
  
  

Glass Louver

• Glass louvers are typically rectangular in shape. They are usually about 6 inches wide and come in lengths of the more popular commercial window sizes. The edges are tempered and not sharp for safety. Glass louvers come in clear, frosted or tinted colors. If you have the tools and skills, you can even cut glass to suit your needs if you don't find what you're looking for at your local building center.
  
  

Surround Frame

• The metal frame is what holds the brackets and glass louvers in place. The frames are attached to the vertical sides of the window frame. You'll need to use appropriate-size nails specified by the frame manufacturer. The frame should have nail holes already drilled into them along their lengths. Make sure to attach the correct end of the frame all the way to the top of the window or you'll have a big gap after you insert the glass.
  
  

Fixing Brackets

• Fixing brackets can come attached to the frame, or you can purchase them separately. These are metal U-shaped clips, usually about ¼ inch on the three sides and then about 6 inches long to accommodate the glass louver. They clip onto the frame. Glass louvers can then slide into place and rest on the bottom part of the U-shaped clip. The top of the glass is freely exposed.
  
  

Handle

• Each window unit consists of the frame and the glass louvers and has a handle to operate the window. An L-shaped handle is located at the bottom right or left corner of the window and it usually has an oblong knob for easy turning. You can adjust louvers from a vertical position, which is closed, to a completely wide-open position, which is 90 degrees.
  
  

Weather Stripping

• New glass louvers close tightly along the frames. But often by design, a small gap is present along the top or bottom of the window frames. Felt or rubber weather stripping is an optional component that can help seal up your louver windows. Just measure the amount you need and nail it into place. The utility of weather stripping is apparent on cold or rainy days or when winds are high or your neighbor's BBQ smoke is bothering you.