Glass Block Solar Wall Tubes

  • Solar Tube Description

    8"x16" solar wall tube with double hollow glass block
    U-Value: 0.21
    R-Value: 4.76

    8"x16" solar wall tube with double solid glass block
    U-Value: 0.26
    R-Value: 3.85

    8"x8" solar wall tube with single hollow glass block
    U-Value: 0.27
    R-Value: 3.70

    8"x8" solar wall tube with single solid glass block
    U-Value: 0.33
    R-Value: 3.03