ENERGY EFFICIENCY RATINGS
In Steel Doors
Half Light U-Factor 36 ” & 3 / 4 Oval
SHGC
1 / 2 ” Clear
1 / 2 ” Std Low-E
1 / 2 ” Clear GBG
1 / 2 ” Std Low-E GBG
1 ” Clear
1 ” Std Low-E
1 ” Std Low-E GBG
BBG Clear
( Raised )
BBG Low-E ( Raised )
BBG
1 ”
Clear Decorative ( Lowered )
Impact Clear
Impact Std Low-E
Impact
GBG Std Low-E
Impact Decorative
1 ” Protector
Clear
1 ” Protector CL-GBG
1 ”
1 ” Protector Protector Std Low-E Low-E-GBG
0.28 0.24 0.27 0.24 0.25 0.22 0.22 0.28 0.25 0.22 0.24 0.25 0.22 0.22 0.22 0.26 0.26 0.22 0.22
0.19 0.11 0.17 0.09 0.19 0.10 0.10 0.17 0.13 0.06 0.15 0.16 0.15 0.14 0.13 0.16 0.14 0.11 0.10
DT / VT 0.19 0.17 0.17 0.15 0.19 0.17 0.17 0.17 0.16 - 0.15 0.18 0.17 0.14 0.14 0.18 0.16 0.16 0.14
3 / 4 Light U-Factor 48 ” & Large Oval
SHGC
0.32 0.27 0.31 0.27 0.29 0.24 0.24 0.32 0.28 0.25 0.26 0.28 0.24 0.24 0.24 0.29 0.29 0.24 0.24
0.26 0.14 0.22 0.12 0.26 0.14 0.12 0.23 0.17 0.07 0.20 0.22 0.20 0.18 0.17 0.22 0.19 0.15 0.13
DT / VT 0.26 0.23 0.23 0.20 0.26 0.23 0.20 0.23 0.21 - 0.20 0.25 0.22 0.19 0.19 0.15 0.22 0.22 0.19
Full Light U-Factor 64 ” & 80 ”
SHGC
0.37 0.31 0.36 0.31 0.33 0.27 0.27 0.37 0.32 0.29 0.30 0.32 0.27 0.27 0.27 0.33 0.33 0.26 0.26
0.34 0.19 0.30 0.16 0.34 0.18 0.16 0.30 0.22 0.09 0.26 0.29 0.27 0.24 0.22 0.29 0.26 0.20 0.18
DT / VT
0.35 0.31 0.30 0.27 0.35 0.31 0.27 0.31 0.29 - 0.27 0.33 0.30 0.26 0.26 0.33 0.29 0.29 0.25
U-Factor : Defines the amount of heat loss . The lower the value , the less heat is transmitted through the entry door .
Solar Heat Gain Coefficient ( SHGC ): The portion of directly transmitted and absorbed solar energy that enters the interior . The lower the value , the less heat is transmitted through the entry .
Daylight Transmission / Visible Transmission ( DT / VT ): Measures how much light comes through the entry . The higher the value , from 0 to 1 , the more daylight is let in over the unit area of the entry .
The performance ratings above were developed by Architectural Testing using applicable NFRC procedures for determining whole product performance . The ratings are determined for a fixed set of conditions and specs .
When installed in the proper door , select RSL doorglass products meet regional ENERGY STAR ® thermal performance standards as defined by the U . S . Department of Energy ( DOE ) and Natural Resources-Canada ( NR-Can ). Energy efficiency ratings for RSL doorglass products vary by door construction , and the size and materials of doorglass assembly .