// CODE SNIPPET
N1101.6 Fenestration Product Rating
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U-factors of fenestration products (windows, doors and skylights) shall be determined in accordance with NFRC 100 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled U-factor shall be assigned a default U-factor from Tables N1101.6(1) and N1101.6(2). The solar heat gain coefficient (SHGC) of glazed fenestration products (windows, glazed doors and skylights) shall be determined in accordance with NFRC 200 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled SHGC shall be assigned a default SHGC from Table N1101.6(3).
FRAME TYPE | SINGLE PANE | DOUBLE PANE | SKYLIGHT | |
SINGLE | DOUBLE | |||
Metal | 1.20 | 0.80 | 2.00 | 1.30 |
Metal with thermal break | 1.10 | 0.65 | 1.90 | 1.10 |
Nonmetal or metal clad | 0.95 | 0.55 | 1.75 | 1.05 |
Glazed block | 0.60 |
DOOR TYPE | U-FACTOR |
Uninsulated metal | 1.20 |
Insulated metal | 0.60 |
Wood | 0.50 |
Insulated, nonmetal edge, max 45% glazing, any glazing double pane | 0.35 |
SINGLE GLAZED | DOUBLE GLAZED | GLAZED BLOCK | ||
Clear | Tinted | Clear | Tinted | |
0.8 | 0.7 | 0.7 | 0.6 | 0.6 |
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