Skylight Technical Performance Information

  • VSE / VSS / VS Testing Data
    VSE/VSS Technical Information
    Glass 04 06** 08 10 9994
    Air infiltration/exfiltration* [max. @ 75 Pa (1.57 lbs/ft2) differential pressure]
    l/s/m2 0.2 0.4 0.2 0.3 0.2
    cfm/ft2 0.03 0.07 0.03 0.06 0.03
    Water resistance @ 3.4 L/m2/min (5 USgal/ft2/hr) *[max. tested differential pressure with no leakage]
    Pascals 720 720 720 720 720
    lbs/ft2 15 15 15 15 15
    Thermal performance (Certified, complete unit values)
    VELUX Glass Skylights are rated at 20° slope and labeled with NFRC-certified U-Factor, SHGC, and VT ratings listed in the NFRC Certified Products Directory
    U-Factor 0.42 0.40 0.42 0.41 0.37
    SHGC 0.23 0.23 0.22 0.23 0.23
    VT 0.53 0.52 0.39 0.52 0.52
    UV protection, %
    (300-380 nm) 99.9 99.9 99.9 99.9 99.9
    Fading protection, % (Krochmann damage function)
    (300-600 nm) 83.1 84.6 88.4 83.2 85.1
    Structural Performance [Performance Grade or DP] *
    Tested Size Uplift (lbs/ft2)
    S06 65 65 65 80 65
    M08 105 65 105 85 105
    C06 n.r. n.r. n.r. 90 n.r.
    Tested Size Download (lbs/ft2)
    S06 370 300 370 860 370
    M08 440 360 440 1090 440
    C06 n.r. n.r. n.r. 1200 n.r.
    * Tested in accordance with AAMA/WDMA/CSA 101/I.S.2/A440-11 (NAFS 2011)

    Structural performance ratings also apply to sizes smaller than the Tested Size VSE and VSS skylights are WDMA Hallmark certified: Product 426-H-670 (not applicable to copper-clad variants)
    ** 06 variant is tested and WDMA Hallmark certified for Wind-borne debris impact, in accordance with ASTM E 1886 and ASTM E 1996. Rated for Wind Zone 3, Missile Level C, Cycle Pressure +50/-50
    04 glass: Tempered over laminated HS (0.030" interlayer)
    06 glass: Tempered over laminated HS (0.090" interlayer)
    08 glass: Same as 04, with white interlayer
    10 glass: Tempered over laminated Tempered (0.030" interlayer)
    9994 glass: Same as 04, with i89 coating on interior surface
    VS Technical Information
    Glass 04 05 06** 08 10 9993 9994
    Air infiltration/exfiltration* [max. @ 75 Pa (1.57 lbs/ft2) differential pressure]
    l/s/m2 0.2 0.5 0.4 0.2 0.3 0.5 0.2
    cfm/ft2 0.03 0.09 0.07 0.03 0.06 0.09 0.03
    Water resistance @ 3.4 L/m2/min (5 USgal/ft2/hr) *[max. tested differential pressure with no leakage]
    Pascals 720 720 720 720 720 720 720
    lbs/ft2 15 15 15 15 15 15 15
    Thermal performance (Certified, complete unit values)
    VELUX Glass Skylights are rated at 20° slope and labeled with NFRC-certified U-Factor, SHGC, and VT ratings listed in the NFRC Certified Products Directory
    U-Factor 0.42 0.43 0.40 0.42 0.41 0.38 0.37
    SHGC 0.23 0.23 0.23 0.22 0.23 0.23 0.23
    VT 0.53 0.54 0.52 0.39 0.52 0.52 0.52
    UV protection, %
    (300-380 nm) 99.9 95.2 99.9 99.9 99.9 95.3 99.9
    Fading protection, % (Krochmann damage function)
    (300-600 nm) 83.1 79.2 84.6 88.4 83.2 81.6 85.1
    Structural Performance [Performance Grade or DP] *
    Tested Size Uplift (lbs/ft2)
    S06 65 90 65 65 80 90 65
    M08 105 120 65 105 85 120 105
    C06 n.r. n.r. n.r. n.r. 90 n.r. n.r.
    Tested Size Download (lbs/ft2)
    S06 370 300 300 370 860 300 370
    M08 440 400 360 440 1090 400 440
    C06 n.r. n.r. n.r. n.r. 1200 n.r. n.r.
    * Tested in accordance with AAMA/WDMA/CSA 101/I.S.2/A440-11 (NAFS 2011)

    Structural performance ratings also apply to sizes smaller than the Tested Size VS skylights are WDMA Hallmark certified: Product 426-H-670 (not applicable to copper-clad variants)
    ** 06 variant is tested and WDMA Hallmark certified for Wind-borne debris impact, in accordance with ASTM E 1886 and ASTM E 1996. Rated for Wind Zone 3, Missile Level C, Cycle Pressure +50/-50
    04 glass: Tempered over laminated HS (0.030" interlayer)
    05 glass: Tempered over tempered
    06 glass: Tempered over laminated HS (0.090" interlayer)
    08 glass: Same as 04, with white interlayer
    10 glass: Tempered over laminated Tempered (0.030" interlayer)
    29 glass: Tempered over tempered over laminated HS (0.030" interlayer)
    9993 glass: Same as 05, with i89 coating on interior surface
    9994 glass: Same as 04, with i89 coating on interior surface
  • FS / VCE / VCS Testing Data
    FS Technical Information
    Glass 04 05 06** 08 10 9993 9994
    Air infiltration/exfiltration* [max. @ 75 Pa (1.57 lbs/ft2) differential pressure]
    l/s/m2 0.1 0.7 0.1 0.1 0.1 0.7 0.1
    cfm/ft2 0.01 0.14 0.01 0.01 0.01 0.14 0.01
    Water resistance @ 3.4 L/m2/min (5 USgal/ft2/hr) *[max. tested differential pressure with no leakage]
    Pascals 720 720 720 720 720 720 720
    lbs/ft2 15 15 15 15 15 15 15
    Thermal performance (Certified, complete unit values)
    VELUX Glass Skylights are rated at 20° slope and labeled with NFRC-certified U-Factor, SHGC, and VT ratings listed in the NFRC Certified Products Directory
    U-Factor 0.44 0.45 0.42 0.44 0.42 0.39 0.38
    SHGC 0.26 0.26 0.26 0.25 0.26 0.26 0.26
    VT 0.6 0.61 0.6 0.44 0.6 0.6 0.6
    UV protection, %
    (300-380 nm) 99.9 95.2 99.9 99.9 99.9 95.3 99.9
    Fading protection, % (Krochmann damage function)
    (300-600 nm) 83.1 79.2 84.6 88.4 83.2 81.6 85.1
    Structural Performance [Performance Grade or DP] *
    Tested Size Uplift (lbs/ft2)
    S06 70 45 65 70 65 45 70
    M08 105 90 120 105 100 90 105
    C06 n.r. n.r. n.r. n.r. 65 n.r. n.r.
    Tested Size Download (lbs/ft2)
    S06 160 400 300 160 720 400 160
    M08 350 400 300 350 1180 400 350
    C06 n.r. n.r. n.r. n.r. 1250 n.r. n.r.
    * Tested in accordance with AAMA/WDMA/CSA 101/I.S.2/A440-11 (NAFS 2011)

    Structural performance ratings also apply to sizes smaller than the Tested Size FS skylights are WDMA Hallmark certified: Product 426-H-669 (not applicable to copper-clad variants)
    ** 06 variant is tested and WDMA Hallmark certified for Wind-borne debris impact, in accordance with ASTM E 1886 and ASTM E 1996. Rated for Wind Zone 3, Missile Level C, Cycle Pressure +50/-50
    04 glass: Tempered over laminated HS (0.030" interlayer)
    05 glass: Tempered over tempered
    06 glass: Tempered over laminated HS (0.090" interlayer)
    08 glass: Same as 04, with white interlayer
    10 glass: Tempered over laminated Tempered (0.030" interlayer)
    29 glass: Tempered over tempered over laminated HS (0.030" interlayer)
    9993 glass: Same as 05, with i89 coating on interior surface
    9994 glass: Same as 04, with i89 coating on interior surface
    VCE /VCS Technical Information
    Glass 04 06** 08 10 9994
    Air infiltration/exfiltration* [max. @ 75 Pa (1.57 lbs/ft2) differential pressure]
    l/s/m2 0.1 0.1 0.1 <0.1 0.1
    cfm/ft2 0.02 0.01 0.02 <0.01 0.02
    Water resistance @ 3.4 L/m2/min (5 USgal/ft2/hr) *[max. tested differential pressure with no leakage]
    Pascals 720 720 720 720 720
    lbs/ft2 15 15 15 15 15
    Thermal performance (Certified, complete unit values)
    VELUX Glass Skylights are rated at 20° slope and labeled with NFRC-certified U-Factor, SHGC, and VT ratings listed in the NFRC Certified Products Directory
    U-Factor 0.53 0.50 0.53 0.51 0.48
    SHGC 0.24 0.24 0.23 0.24 0.23
    VT 0.55 0.54 0.40 0.54 0.54
    UV protection, %
    (300-380 nm) 99.9 99.9 99.9 99.9 99.9
    Fading protection, % (Krochmann damage function)
    (300-600 nm) 83.1 84.6 88.4 83.2 85.1
    Structural Performance [Performance Grade or DP] *
    Tested Size Uplift (lbs/ft2)
    4646 45 60 45 40 45
    2246 n.r. n.r. n.r. 65 n.r.
    Tested Size Download (lbs/ft2)
    4646 230 230 230 620 230
    2246 n.r. n.r. n.r. 1150 n.r.
    * Tested in accordance with AAMA/WDMA/CSA 101/I.S.2/A440-11 (NAFS 2011)

    Structural performance ratings also apply to sizes smaller than the Tested Size VCE and VCS skylights are WDMA Hallmark certified: Product 426-H-695
    ** 06 variant is tested and WDMA Hallmark certified for Wind-borne debris impact, in accordance with ASTM E 1886 and ASTM E 1996. Rated for Wind Zone 3, Missile Level C, Cycle Pressure +50/-50
    04 glass: Tempered over laminated HS (0.030" interlayer)
    06 glass: Tempered over laminated HS (0.090" interlayer)
    08 glass: Same as 04, with white interlayer
    10 glass: Tempered over laminated Tempered (0.030" interlayer)
    9994 glass: Same as 04, with i89 coating on interior surface
  • VCM / FCM Testing Data
    VCM Technical Information
    Glass 04 05 06** 10 9993 9994
    Air infiltration/exfiltration* [max. @ 75 Pa (1.57 lbs/ft2) differential pressure]
    l/s/m2 0.1 <0.1 0.1 <0.1 <0.1 0.1
    cfm/ft2 0.02 <0.01 0.01 <0.01 <0.01 0.02
    Water resistance @ 3.4 L/m2/min (5 USgal/ft2/hr) *[max. tested differential pressure with no leakage]
    Pascals 720 720 720 720 720 720
    lbs/ft2 15 15 15 15 15 15
    Thermal performance (Certified, complete unit values)
    VELUX Glass Skylights are rated at 20° slope and labeled with NFRC-certified U-Factor, SHGC, and VT ratings listed in the NFRC Certified Products Directory
    U-Factor 0.53 0.50 0.53 0.51 0.48 0.48
    SHGC 0.24 0.24 0.23 0.24 0.23 0.23
    VT 0.55 0.54 0.40 0.54 0.54 0.54
    UV protection, %
    (300-380 nm) 99.9 95.2 99.9 99.9 95.3 99.9
    Fading protection, % (Krochmann damage function)
    (300-600 nm) 83.1 79.2 84.6 83.2 81.6 85.1
    Structural Performance [Performance Grade or DP] *
    Tested Size Uplift (lbs/ft2)
    4646 45 30 60 40 30 45
    2246 n.r. n.r. n.r. 65 n.r. n.r.
    Tested Size Download (lbs/ft2)
    4646 230 230 230 620 230 230
    2246 n.r. n.r. n.r. 1150 n.r. n.r.
    * Tested in accordance with AAMA/WDMA/CSA 101/I.S.2/A440-11 (NAFS 2011)

    Structural performance ratings also apply to sizes smaller than the Tested Size VCM skylights are WDMA Hallmark certified: Product 426-H-695
    ** 06 variant is tested and WDMA Hallmark certified for Wind-borne debris impact, in accordance with ASTM E 1886 and ASTM E 1996. Rated for Wind Zone 3, Missile Level C, Cycle Pressure +50/-50
    04 glass: Tempered over laminated HS (0.030" interlayer)
    05 glass: Tempered over tempered
    06 glass: Tempered over laminated HS (0.090" interlayer)
    08 glass: Same as 04, with white interlayer
    10 glass: Tempered over laminated Tempered (0.030" interlayer)
    9993 glass: Same as 05, with i89 coating on interior surface
    9994 glass: Same as 04, with i89 coating on interior surface
    FCM Technical Information
    Glass 04 05/05C 06** 08 10 29/30 9993 9994
    Air infiltration/exfiltration* [max. @ 75 Pa (1.57 lbs/ft2) differential pressure]
    l/s/m2 0.2 <.1 <.1 0.2 0.1 0.3 <.1 0.2
    cfm/ft2 0.03 <0.01 <0.01 0.03 0.01 0.05 <0.01 0.03
    Water resistance @ 3.4 L/m2/min (5 USgal/ft2/hr) *
    [max. tested differential pressure with no leakage]
    Pascals 720 720 720 720 720 720 720 720
    lbs/ft2 15 15 15 15 15 15 15 15
    Thermal performance (Certified, complete unit values)
    VELUX Glass Skylights are rated at 20° slope and labeled with NFRC-certified U-Factor, SHGC, and VT ratings listed in the NFRC Certified Products Directory.
    Ratings for products with standard available fitted shades are on the last page.
    U-Factor 0.48 0.49/0.45 0.46 0.48 0.47 0.38 0.43 0.43
    SHGC 0.27 0.27 0.27 0.26 0.27 0.25 0.25 0.25
    VT 0.63 0.64 0.62 0.46 0.62 0.58 0.57 0.57
    UV protection, % (Glass panel only)
    (300-380 nm) 99.9 95.2 99.9 99.9 99.9 95.2 95.3 99.9
    Fading protection, % Krochmann damage function (Glass panel only)
    (300-600 nm) 83.1 79.2 84.6 88.4 83.2 79.2 81.6 85.1
    Certified Structural Performance [Performance Grade or DP] *
    Tested Size Uplift (lbs/ft2)
    4672 80 n.r. n.r. 80 n.r. n.r. n.r. 80
    4646 120 140 80 120 135 60 140 120
    2270 100 n.r. n.r. 100 n.r. n.r. n.r. 100
    Tested Size Download (lbs/ft2)
    4672 70 n.r. n.r. 70 n.r. n.r. n.r. 70
    4646 250 100 100 250 970 75 100 250
    2270 200 n.r. n.r. 200 n.r. n.r. n.r. 200
    * Tested in accordance with AAMA/WDMA/CSA 101/I.S.2/A440-11 (NAFS 2011)

    Structural performance ratings also apply to sizes smaller than the Tested Size FCM skylights are WDMA Hallmark certified: Product 426-H-701
    ** 06 variant is tested and WDMA Hallmark certified for Wind-Borne debris impact, Florida HVHZ: Large Missile Level D, Cycle Pressure +50/-50, tested per TAS 201, 202 and 203 (Wind Zone 4) Large Missile Level C, Cycle Pressure +50/-50, tested per ASTM E 1886 and ASTM E 1996
    04 glass: Tempered over laminated HS (0.030" interlayer)
    05 glass: Tempered over tempered; 05C for Canada has a smaller pane gap
    06 glass: Tempered over laminated HS (0.090" interlayer)
    08 glass: Same as 04, with white interlayer
    10 glass: Tempered over laminated Tempered (0.030" interlayer)
    29 glass: Tempered over tempered over laminated HS (0.030" interlayer)
    30 glass: Tempered over tempered over tempered
    9993 glass: Same as 05, with i89 coating on interior surface
    9994 glass: Same as 04, with i89 coating on interior surface
    Note: The FCM 4646 (or smaller) 06 is the only VELUX skylight currently qualified for use in the Florida HVHZ (High Velocity Hurricane Zone).
  • QPF / SUN TUNNEL Skylights Testing Data
    QPF Technical Information
    Glass 04 05 06** 08 9993 9994
    Air infiltration/exfiltration* [max. @ 75 Pa (1.57 lbs/ft2) differential pressure]
    l/s/m2 0.5 0.3 0.4 0.5 0.3 0.5
    cfm/ft2 0.09 0.06 0.08 0.09 0.06 0.09
    Water resistance @ 3.4 L/m2/min (5 USgal/ft2/hr) *[max. tested differential pressure with no leakage]
    Pascals 580 720 720 580 720 580
    lbs/ft2 12 15 15 12 15 12
    Thermal performance (Certified, complete unit values)
    VELUX Glass Skylights are rated at 20° slope and labeled with NFRC-certified U-Factor, SHGC, and VT ratings listed in the NFRC Certified Products Directory
    U-Factor 0.44 0.45 0.42 0.44 0.40 0.39
    SHGC 0.24 0.24 0.24 0.24 0.24 0.24
    VT 0.56 0.57 0.55 0.41 0.55 0.55
    UV protection, %
    (300-380 nm) 99.9 95.2 99.9 99.9 95.3 99.9
    Fading protection, % (Krochmann damage function)
    (300-600 nm) 83.1 79.2 84.6 88.4 81.6 85.1
    Structural Performance [Performance Grade or DP] *
    Tested Size Uplift (lbs/ft2)
    4646 80 80 100 80 80 80
    Tested Size Download (lbs/ft2)
    4646 320 300 300 320 300 320
    * Tested in accordance with AAMA/WDMA/CSA 101/I.S.2/A440-11 (NAFS 2011)

    Structural performance ratings also apply to sizes smaller than the Tested Size QPF skylights are WDMA Hallmark certified: Product 426-H-677
    ** 06 variant is tested and WDMA Hallmark certified for Wind-borne debris impact, in accordance with ASTM E 1886 and ASTM E 1996. Rated for Wind Zone 3, Missile Level C, Cycle Pressure +50/-50
    04 glass: Tempered over laminated HS (0.030” interlayer)
    05 glass: Tempered over tempered
    06 glass: Tempered over laminated HS (0.090” interlayer)
    08 glass: Same as 04, with white interlayer
    9993 glass: Same as 05, with i89 coating on interior surface
    9994 glass: Same as 04, with i89 coating on interior surface
    SUN TUNNEL™ skylights Technical Information*
    Model TLR TSR TCR TGF TGR TMF TMR/THR
    Air infiltration/exfiltration* [max. @ 75 Pa (1.57 lbs/ft2) differential pressure]]
    l/s/m2 0.1 0.3 0.5 0.2
    cfm/ft2 0.01 0.05 0.09 0.04
    Water resistance @ 3.4 L/m2/min (5 USgal/ft2/hr)*[max. tested differential pressure with no leakage]
    Pascals (Pa) 720 720 720 720
    lbs/ft2 (psf) 15 15 15 15
    Thermal performance (Certified, complete unit values)
    VELUX SUN TUNNEL™ skylights are labeled with certified U-Factor (with insulation at ceiling), and SHGC ratings, as listed in the NFRC Certified Products Directory
    U-factor: Btu/[hr*ft2*F˚]
    Base Model .51 tbd n.r. 0.50 n.r. 0.50 n.r.
    w/ Energy kits 0.36 n.r. 0.38 0.37 0.38 0.37 0.38
    SHGC: US ratings shown for models with EO energy kits
    Base model 0.46 tbd n.r. 0.21 n.r. 0.21 n.r.
    w/ Energy kits n.r. n.r. 0.25 n.r. (0.21) 0.25 n.r. 0.25
    Visible transmittance (VT) annual: US ratings shown for models with E0 energy kits
    VT base model 0.36 tbd n.r. 0.16 n.r. 0.16 n.r.
    VT w/energy kits n.r. n.r. 0.40 n.r. 0.40 n.r. 0.40
    Structural Performance *-Performance Grades or DP in psf: NAFS-11 (NAFS-08) [Note: 1 psf = 47.88 Pa]
    Dome Type:** Uplift (negative)
    Acrylic or Polycarbonate NA 240 (155) Acrylic only 165 (125) 125 (90)
    Tempered Glass 245 (170) NA
    Dome Type:** Download (positive)
    Acrylic or Polycarbonate NA 400 (250) Acrylic only 300 (200) 300 (200)
    Tempered Glass 150 (150) NA
    * Tested and certified in accordance with AAMA/WDMA/CSA 101/I.S.2/A440-11 (NAFS 2011). VELUX SUN TUNNEL™ skylights are WDMA Hallmark certified as indicated above and below (See www.wdma.com, Hallmark Nos. 426-H-626, -693, -705, -706)
    **All VELUX® SUN TUNNEL skylights with Polycarbonate domes are tested for Wind-Borne debris impact and pressure
    cycling in accordance with ASTM E 1886-05 and ASTM E 1996-05.
    -- Rated for Wind Zone 3, Missile Level C, Cycle Pressure +50/-50 --
    The following models do not have Polycarbonate domes - THR, TLR, TSR

    NOTICE: ALL GLASS MAY BE SUBJECT TO UNEXPECTED AND SPONTANEOUS BREAKAGE in rare circumstances due to imperfections in the glass that are undetectable during the manufacturing and inspection process by the manufacturer of the glass and VELUX.

    VELUX America LLC offers the choice of laminated or tempered glass skylights.Impact glass and comfortplus glass are all types of laminated glass. Comfortglass is a type of tempered glass. Laminated glass is a combination of two or more glass sheets with one or more interlayers of plastic (PVB). In case of breakage, the interlayer is designed to hold the fragments together. Tempered glass does not contain an interlayer to hold the fragments together. Instead,tempered glass is designed to break into small, pebble-like pieces. When tempered glass breaks, pieces of glass come loose and may strike an individual.

    CONSULT LOCAL REGULATIONS AND/OR BUILDING MATERIAL CONSULTANTS TO DETERMINE WHICH TYPE OF GLASS IS RIGHT FOR YOU OR IF LAMINATED GLASS OR GLASS RETENTION SCREENING IS REQUIRED IN YOUR APPLICATION.

Testing Data Notes
  1. Production samples structurally tested and labeled in accordance with one or more of: AAMA/WDMA/ CSA 101/I.S.2/A440, TAS201, 202, and 203; OSHA regulations; various ASTM methods.
  2. Thermal and optical performance data are determined for skylights at 20 degree slope, and verified in accordance with NFRC procedures (where applicable) by accredited entities. Most VELUX products are listed in the NFRC Certified Products Directory, and carry appropriate labels in accordance with NFRC’s certification program. NFRC ID: VEL-N-xxx
  3. Most variants have achieved WDMA Hallmark certification under No. 426-H, and/or recognition under Uniform-ES report #ER 0199 (IAPM0-ES).

    In addition, Florida and TDI have listed most variants in their product evaluation/approval systems.