Natural Resources Canada
www.nrcan.gc.ca
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Windows
Legend
Window Styles
Material
FAW Fixed awning
AWS Awning (single)
AWD Awning (double)
FCA Fixed casement
CAS Casement (single)
CAD Casement (double)
SHU Single hung
DHU Double hung
THU Triple hung
SSL Single slider
DSL Double slider
TSL Triple slider
HOP Hopper
PIC Fixed (picture)
PTC Pivot (center)
TNT Dual action (tilt-turn)
ACL Aluminum clad
ALU Aluminum
AVY Aluminum/Vinyl
AWO Aluminum/Wood
CMP Composite
FBG Fibreglass
FOF Foam filled
MRE Metal reinforced
STL Steel
VCL Vinyl clad
VYL Vinyl
VWO Vinyl/Wood
WOD Wood
WFG Wood/Fibreglass
WRE Wood reinforced
U = U-value (W/m² – K) – The lower the number, the more energy efficient the product.
SHGC = Solar Heat Gain Coefficient – The higher the number, the higher the solar gain.
ER = Energy Rating (W/m² or dimensionless) – The higher the number, the more energy efficient the product.
The ER (Energy Rating) format was changed to all positive numbers (dimensionless) in October, 2004 by CSA (Canadian Standards Association) to address consumer confusion over negative numbers. The older format had a mixture of negative and positive numbers (W/m²). In our listings, all ER numbers that appear in the older format are shown in bold coloured type. An approximate conversion to the new format can be made by adding 33 to these numbers.
