NFRC Certification

NFRC-Certified Windows

These window series carry NFRC energy performance ratings from the National Fenestration Rating Council. NFRC ratings cover U-factor, Solar Heat Gain Coefficient (SHGC), Visible Transmittance (VT), and Air Leakage — providing independently verified data for energy code compliance and project specifications.

Material

Aluminum

LD-X76 Series thermal-break aluminum casement window in a residential interior
LD-X76 Series Thermal-Break Aluminum Window
NFRC Matching Door Series Available
CasementTilt-TurnAwningFixed
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LD-S8520 Slimline Series thermal-break aluminum windows on a modern architectural building facade
LD-S8520 Slimline Series Thermal-Break Aluminum Window
NFRC
CasementTilt-TurnFixed
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WJ-91 Series aluminum tilt-turn window open in modern living room with lake view
WJ-91 Series Thermal-Break Aluminum Window
NFRC Matching Door Series Available
CasementTilt-Turn
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WJ-110 Slim Frame Series aluminum sliding window in modern living room
WJ-110 Slim Frame Series Thermal-Break Aluminum Window
NFRC
Slim Frame Sliding
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Material

uPVC

PRM-82 Series uPVC hung windows on house with green trim exterior
PRM-82 Series uPVC Window
NFRC
Single HungDouble HungCasementSlidingFixed
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WJ-72 Series uPVC casement window in modern bedroom with forest view
WJ-72 Series uPVC Window
NFRC
CasementTilt-TurnFixed
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