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U-Factor
Minimizes unwanted
heat flow through our
door for better thermal
performance.
VT
Growth
SHG
U-Factor
Disruptive Value
Proposition
WHAT YOU NEED TO KNOW
•
Heat flows from warmer to cooler bodies. Doors lose heat to the outside in
the Winter and gain heat from the outside during the Summer
Transformational
Lean
• STANLEY can reduce the U-factor by up to 40%* by better preventing interior heat from escaping to the outside
•
Depends on size, temperature and components of the door
REFERENCE NUMBERS
•
Colder climates want a low U-Factor (.52) to resist heat loss
•
Based on IECC C402.4.3 / ASHARE 90.1 / NFRC 100: 1.10 - .77 BTU/ (hr) (F temp differential)*
•
Dura-Glide GreenStar Range: 1.04-.52
Compared to ¼” glass, insulated glass on a typical 14’ Dura-Glide GreenStar bi-parting door
U-Factor Guide: Cooler climates can prevent heat loss
U-Factor Glass With Door Frame
Low U-Factor
Growth
High U-Factor
don’t need to resist heat loss
resist heat loss
1.20
1.00
0.80
Recommend: Bi-parting
168” x 92” or Single Slide
96” x 92” with transom, 1”
glass with SB60 air glass,
10” bottom rails, 2” muntins,
narrow stiles
Recommend:
Bi-parting
Disruptive
Value
Proposition
168” x 92” or Single
Slide
96” x 92”, 1/4” glass, no
transom, 10” bottom rails, 2”
muntins, narrow stiles
U-Factor 0.62
U-Factor 1.03 - 1.04
0.60
0.40
Recommend: Bi-parting 192” x 92” or
Single Slide 108” x 92” with transom. 1”
SB60 argon glass, 4” bottom rails, no
muntins, narrow stiles
Transformational
Lean
U-Factor 0.52
0.20
COLD
HOT
Climate
Simulations performed by an NFRC accredited lab
U-Factor Guide: Maximize glass for best results
Growth
Bi-parting, 192” X 92“
Single Slide 108” X 92“
Bi-parting, 168” X 92“
4" Bottom Rails, No Muntins, Narrow Stiles, No Transom
Single Slide, 96” X 92”
10” Bottom Rails, 2” Muntin, Narrow Stiles, No Transom
U-Factor: Glass With Door
1.20
1.03-1.04
1.02
1.00
Dura-Glide
with ¼” Glass
Dura-Glide
with ¼” Glass
IECC Range
IECC
Disruptive Value
Proposition
Range
0.80
0.60
0.64
0.56
0.40
0.62
Transformational
Dura-Glide Lean
GreenStar
0.53
Dura-Glide
GreenStar
0.20
1/4" Glass
(1.03)
SB60 Air
(0.29)
SB60 Argon
(0.24)
1/4" Glass
(1.03)
SB60 Air
(0.29)
SB60 Argon
(0.24)
Glass Type
Simulations performed by an NFRC accredited lab