Performance Data


Note: Data published is for comparison purposes only and is accurate as of January 1, 2014. Performance data is for overall window/door units and not glass only. Data presented is a range based on options available in certified product. Please contact your Authorized AMSCO Dealer for actual values of units.

U-Value measures how well the window prevents heat from escaping the home. The lower the number the better the window is at preventing heat transfer. 

Solar Heat Gain Coefficient (SHGC) measures how well a window blocks heat from the sun. The lower the number the better the window is at blocking the sun's heat.

Visible Transmittance (VT) measures the amount of visible light coming through the window. The higher the number the better the window is at allowing light in.

Sound Tranmission Class(STC) measures the amount of sound impedance as transferred through the window. The higher the number the better the window is at impeding sound.

All values are certified through AAMA or NFRC.


Vista Structural U-Value SHGC VT
Single Hung R-PG25 0.50-0.22 0.66-0.18 0.66-0.26
Single Vent R-PG20 0.50-0.22 0.65-0.18 0.66-0.26
Double Vent R-PG15 0.50-0.22 0.65-0.18 0.66-0.26
Picture Window CW-PG35 0.49-0.16 0.71-0.19 0.75-0.28
Studio Series Structural Rating U-Value SHGC VT
Single Hung R-PG25/LC-PG35/C-PG50 0.34-0.29 0.31-0.23 0.58-0.54
Horizontal Slider R-PG15/LC-PG25/C-PG35 0.34-0.29 0.31-0.23 0.58-0.53
Picture Window (Direct Set) R-PG/LC-PG35/C-PG50 0.32-0.26 0.33-0.25 0.63-0.58
Single Hung
Equal Lite
LC-PG35 0.35-0.30 0.29-0.22 0.55-0.51
Horizontal Slider
Equal Lite
LC-PG25 0.35-0.30 0.29-0.22 0.55-0.51
Picture Window
Equal Lite
LC-PG25 0.32-0.28 0.31-0.23 0.58-0.53
Contemporary Style
Sliding Glass Door
(2-Panel) R-20 / LC-30 0.41-0.24 0.56-0.16 0.65-0.25
Artisan Series Structural Rating U-Value SHGC VT
Double Hung R-PG20 / LC-PG25 0.35-0.30 0.27-0.20 0.50-0.46
Single Hung R-PG35 0.34-0.29 0.29-0.21 0.54-0.50
Horizontal Slider R-PG15/LC-PG25/LC-PG35 0.35-0.35 0.29-0.21 0.54-0.50
Picture Window
(Direct Set)
CW-PG35 0.32-0.27 0.33-0.24 0.62-0.57
Picture Window
(Sash & Frame)
LC-PG25 0.33-0.28 0.27-0.22 0.57-0.52
Casement LC-PG25/CW-PG40/C-PG50 0.32-0.28 0.25-0.18 0.46-0.43
Awning LC-PG30/LC-PG40 0.32-0.28 0.25-0.18 0.46-0.43
Contemporary Style
Sliding Glass Door
(2-panel)R-20/LC-30
(3-panel)R-20
(4-panel)R-15
0.41-0.24 0.56-0.16 0.65-0.25
French Style
Sliding Glass Door
(2-Panel)R-35
(3-Panel)C-30
(4-Panel)LC-25
0.36-0.33 0.28-0.17 0.47-0.25
Renaissance Series Strutural Rating U-Value SHGC VT
Horizontal Slider R-PG15 / LC-PG25 0.34-0.21 0.27-0.18 0.51-0.34
Double Hung R-PG25/R-PG30/R-PG50/ 0.34-0.21 0.27-0.18 0.51-0.34
Casement LC-PG40 0.31-0.19 0.27-0.17 0.50-0.33
Awning LC-PG30 0.31-0.19 0.27-0.17 0.50-0.33
DH Picture Window LC-PG25 0.32-0.19 0.28-0.19 0.52-0.36
Transom Picture Window LC-PG30 0.32-0.19 0.29-0.18 0.54-0.35
Casement Picture Window CW-PG40 0.31-0.19 0.30-0.17 0.57-0.33
Direct Set Picture Window CW-PG55 0.32-0.17 0.33-0.21 0.63-0.42
Contemporary Style
Sliding Glass Door
C-30 (2-Panel)
LC-25 (3-Panel)
R-20 (4-Panel)
0.36-0.18 0.48-0.13 0.57-0.21
Serenity Series Structural Rating U-Value SHGC VT STC
Single Hung LC-PG35 0.29-0.20 0.54-0.20 0.58-0.44 40-47
Horizontal Slider R-PG20/LC-PG25 0.29-0.20 0.54-0.20 0.58-0.44 40-47
Picture Window (Direct Set) CW-PG35 0.30-0.18 0.58-0.21 0.61-0.47 40-47
Casement CW-PG30 0.30-0.18 0.36-0.13 0.39-0.30 40-47
Awning CW-PG30 0.30-0.18 0.36-0.13 0.39-0.30 40-47