Product

Description

U-Factor

Condensation
Resistance
Value

Solar
Heat Gain
Coefficient

Visible Light
Transmittance

Air Leakage
(cmf/ft2)

SunClad Easy-Tilt Double Hung

Clad Wood Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.37

.32

.49

.06

SunClad Easy-Tilt Double Hung

Clad Wood Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.37

.29

.44

.06

SunClad Casement

Clad Wood Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.38

.28

.46

.01

SunClad Casement

Clad Wood Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.38

.26

.42

.01

SunClad Inswing Door

Clad Wood Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.32

.25

.42

 na

SunClad Inswing Door

Clad Wood Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.32

.25

.42

 na

SunVinyl SH57 Single Hung

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.31

57

.34

.56

.25

SunVinyl SH57 Single Hung

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.32

57

.30

.50

.25

SunVinyl SS20 Single Slider

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.30

58

.34

.56

.16

SunVinyl SS20 Single Slider

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.31

58

.30

.50

.16

SunVinyl SH57 Single Hung Fixed Lite

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.28

60

.35

.58

na

SunVinyl SH57 Single Hung Fixed Lite

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.30

60

.32

.52

na

SunVinyl DH57 Double Hung

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.30

56

.33

.55

.25

SunVinyl DH57 Double Hung

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.32

56

.30

.49

.25

SunVinyl DH57 Double Hung Fixed Lite

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.27

61

.35

.58

na

SunVinyl DH57 Double Hung Fixed Lite

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.29

61

.32

.52

na

SunVinyl DH54 Double Hung

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.30

56

.33

.55

.25

SunVinyl DH54 Double Hung

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.32

56

.30

.49

.25

SunVinyl DH54 Double Hung Fixed Lite

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / No Muntins

.28

60

.35

.58

na

SunVinyl DH54 Double Hung Fixed Lite

Vnyl Frame / Double Glazed / Low-E II / Argon Filled / With Muntins

.29

60

.32

.52

na

Energy Savings will depend on your specific climate, house and lifestyle.
For more information on the Ratings, see NFRCs web site.

Performance Requirements
1. AAMA/NWWDA 101/I.S.2-97
2. Air Leakage tested in accordance with ASTM E 283-91 at 1.57 psf (25 mph), shall be 0.25 cfm/ft2 of frame or less.

The NFRC label, which can be found on all ENERGY STAR qualified windows, provides performance ratings in a number of categories:

U-Factor measures the rate of heat transfer and tells you how well the window insulates. The lower the U-Factor, the better the window insulates. U-Factor values generally range from 0.25 to 1.25.
Solar Heat Gain Coefficient (SHGC) measures the fraction of solar energy admitted and tells you how well the product blocks heat caused by sunlight. The lower the SHGC, the less solar heat the window transmits. SHGC is measured on a scale of 0 to 1; values typically range from 0.25 to 0.80.
Visible Transmittance (VT) measures the amount of light the window lets through. The higher the VT, the more light you see. VT is measured on a scale of 0 to 1; values generally range from 0.20 to 0.80.
Air Leakage (AL) measures the rate at which air passes through cracks in the window. AL is measured in cubic feet of air passing through one square foot of window area per minute. The lower the AL value, the less air leakage. Most industry standards and building codes require an AL of 0.3 cfm/ft2.
Condensation Resistance measures how well the window resists water build-up. The higher the condensation resistance factor, the less build-up the window allows. Condensation Resistance is scored on a scale from 0 to 100. The Condensation Resistance rating is useful when comparing different products.

ENERGY STAR qualification is based on U-Factor and SHGC ratings only.