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Window

A piece of glass in the wall of a house or a car

  • A typical window has an R-value ranging from 0.9 to 3.0. Double-pane: 2–3 on average.
  • Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. source
  • table compares R values for honeycomb shades with tracks. (source is a blinds seller)
  • I remember reading a paper that said side tracks are more important than type of blinds.

Don’t confuse with window