Technical Specifications

Save energy
NFRC LABEL RATINGS
We know our Select 500 Series windows
and patio doors are energy efficient. But
don’t take our word for it. All Crestline
products are rated, certified and
labeled for U-Value, Solar Heat Gain,
Visible Transmittance, Air Leakage and
Condensation Resistance by the National
Fenestration Rating Council (NFRC).
By using the information on the label,
products can easily be compared within
the product line or against competitors.
With the majority of a window being made up of glass,
picking the right glass is crucial. Crestline offers a wide range
of glass to meet the performance that is right for you.
STANDARD
LOW E
2
ZO-E-SHIELD 5 ZO-E-SHIELD 5
EXTREME
U-Value*
0.27 0.26 0.23
Solar Heat Gain Coefcient*
0.30 0.20 0.19
Visible Light Transmittance*
0.52 0.46 0.42
Ultraviolet Rays Blocked
85% 95% 95%
*TotalUnitcalculationsarederivedfromcomputersimulationsthatarethenveriedby3rdparty
testing in accordance with NFRC 100-04. Values include Argon gas.
Casement Total Unit Performance
Real Warm-Edge® Spacer System
Crestline’s Real Warm-Edge® spacer has no metal to transfer
temperatures.Thisimprovestheefciencyoftheglassand
reduces condensation and frost build-up. Standard on all
Crestline insulated glass.
METAL
SPACER
REAL
WARM
EDGE
4
Crestline Select 500 Vinyl Clad Windows & Patio Doors