Cambridge Performance Data

 
Standard Glass Package
Thermal Performance
Northern Zone Glass Package
Thermal Performance
Air, Water & Structural
Performance
Sound Thermal Performance
Footnotes
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Performance PDF

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Standard Glass Package Thermal Performance

  Visible Light
Transmittance2
   SHGC  
Glazing Window Style Size Total Unit
U-Value1
Grids No Grids Daylight
Transmittance3
Tdw-ISO4 Grids No Grids Condensation
Resistance6
Low-e glass,
low-conductance
spacer and
argon gas fill.
Double-Hung  47-1/4"x59"  0.29  0.41  0.46  64% 0.559 0.18  0.20  56
Single-Hung  47-1/4"x59"  0.29  0.41  0.46   64% 0.559 0.18 0.20  56
Picture  47-1/4"x59"  0.26  0.45  0.51   64% 0.559  0.20  0.22 61
Slider 59"x47-1/4"  0.28  0.41  0.46  64% 0.559 0.18 0.20  60

 

Northern Glass Package Thermal Performance

  Visible Light
Transmittance2
   SHGC5   
Glazing Window Style Size Total Unit
U-Value1
Grids No Grids Daylight
Transmittance3
Tdw-ISO4 Grids No Grids Condensation
Resistance6
Low-e glass,
low-conductance
spacer and
argon gas fill.
Double-Hung  47-1/4"x59"  0.29  0.46  0.52  71% 0.559 0.38  0.42  56
Single-Hung  47-1/4"x59" 0.30 no grids
0.29 with grids
 0.45  0.51   71% 0.559 0.38 0.42  56
Picture  47-1/4"x59"  0.27  0.50  0.56   71% 0.559  0.42  0.46 61
Slider 59"x47-1/4"  0.29  0.49  0.49   71% 0.559 0.37 0.40  60

 

Air, Water and Structural Performance

Window Style Individual
Unit Size
Mulled
Unit Size
Test Method
Total Unit
Air Infiltration
@25MPH
Water
(PSF)
Structural
Rating
Overall
Grade
Rating
Double-Hung 48"x72" AAMA/WDMA/CSA 101/I.S.2/A440-05 0.11 CFM 9.82 60 R60
Single-Hung 48"x72" AAMA/WDMA/CSA 101/I.S.2/A440-05 0.09 CFM 9.19 60 R36
Double-Hung Oriel 36"x72" AAMA/WDMA/CSA 101/I.S.2/A440-05 0.06 CFM 7.52 50 R50
Double-Hung Reverse Oriel 48"x72" AAMA/WDMA/CSA 101/I.S.2/A440-05  0.11 CFM 7.52 50  R50
Single-Hung Oriel 36"x72" AAMA/WDMA/CSA 101/I.S.2/A440-05  0.05 CFM 7.52  50 R50
Single-Hung Reverse Oriel 36"x72" AAMA/WDMA/CSA 101/I.S.2/A440-05 0.03 CFM 6.06  40 R40
Twin Double-Hung

52" x 80"

104" x 80"

AAMA/WDMA/CSA 101/IS2/A440-05

0.11 CFM

7.52

40

R40

Triple Double-Hung 52"x80" 157" x 80" AAMA/WDMA/CSA 101/I.S.2/A440-05  0.11 CFM 7.52  40 R40
Picture 96"x48" AAMA/WDMA/CSA 101/I.S.2/A440-05   0.01 CFM  12.12  70 R70
2-Lite Slider 96"x48" AAMA/WDMA/CSA 101/I.S.2/A440-05   0.10 CFM 9.20  50 R50
3-Lite Slider 1/4-1/2-1/4 138"x60" AAMA/WDMA/CSA 101/I.S.2/A440-05  0.08 CFM  8.36  25  R25
3-Lite Slider 1/3-1/3-1/3 138"x60"  — AAMA/WDMA/CSA 101/I.S.2/A440-05   0.11 CFM 8.36  30 R30

 

Sound Transmission

Window Style Unit Size
IG Unit Glazing
STC  OITC
Double-Hung 47-1/4"x59" 15/16" 1/8" annealed, 1/2" spacer, 1/8" annealed 27 22
Single-Hung 47-1/4"x59" 15/16" 1/8" annealed, 1/2" spacer, 1/8" annealed 27 22
Picture 47-1/4"x59" 15/16" 1/8" annealed, 1/2" spacer, 1/8" annealed 31 25
Slider 59"x47-1/4" 15/16" 1/8" annealed, 1/2" spacer, 1/8" annealed 27 22
STC rating was calculated in accordance with ASTM E 413.

 

Cambridge Thermal Testing Footnotes
Terms

1    Windows tested per NFRC 100. Data applies to double-pane insulated glass units using a double-strength glass with a 1/2" airspace.
Data applies to:
*Cambridge double-pane insulated glass units using double-strength glass with 11/16" air space.

2    Tested using GED’s Intercept® ULTRA low-conductance warm-edge spacer system. Calculations provided by Lawrence Berkeley Laboratory Window 5.2 and Optics5 software based on 15/16" IGU for Cambridge windows.

3    Daylight Transmittance measures the performance of the glass only.

4    International Standards Organization Damage Weighted Transmission Rating (Tdw-ISO) calculations performed by Lawrence Berkeley Laboratory 5.2 Windows software and is weighted using recommended International Commission on Illumination (CIE) standards.

5    Solar Heat Gain Coefficient (SHGC) tested in accordance with NFRC 200. This value varies by style, glazing system and grids.

6    Condensation Resistance is tested in accordance with NFRC 500.