Louvers Size: 2.5", 3.5" & 4.5"
Big is Modern, Small is Yesterday
Today's trend is to big louvers. 3.5" is most popular (80%) and safe, 4.5" is often considered too large but is great where large scale in needed, view is important or a modern look is sought. The wider the louver, the fewer louvers and the more space between louvers.
2.5" is reserved mainly for old style designs. 1.375" and 1.75" louvers are still available but are expensive.
Tilt: Center = Traditional
Looks like a shutter should look. Variable Louver Spacing Available
Hidden or Intrinsic = Contemporary
Provides better view and modern look. Fixed louver spacing. 10% premium