2200 & 2400 Series Double Hung Window Performance Data
U Value
R Value
SHGC
VLT
3/4" Clear
.49
2.04
.63
.65
3/4" Low-E
.35
2.86
.37
.56
3/4" Low-E/Argon
.32
3.13
.37
.56
Tested in accordance with ASTM standards; rated in accordance with International Residence Code, & witnessed by an independent AAMA accredited lab. Units were tested without dividers.
Note:
U Value=
Ultraviolet transferrance
R Value=
Restrictive ambient air flow
SHGC=
Solar Heat Gain Coefficient
VLT=
Visible Light Transmission
ENERGY STAR® Qualification Criteria WINDOWS AND DOORS
