Fenestration Performance: 17
sloped alum no break to sloped structural glazing
ASHRAE Chapter 15 fenestration U-factors (W/m²·K) for windows, skylights, curtain walls, and doors by glazing configuration and frame type. Covers single through quadruple glazing with air, argon, and krypton fill, low-e coatings at various emissivities, and all major frame materials. Source: ASHRAE Handbook Fundamentals 2021 Tables 4 and 6.
| glazing id | frame type | gap fill | gap mm (mm) | glazing category | glazing type | low e emissivity (dimensionless) | low e surface | num panes (dimensionless) | u factor Wm2K (W/(m2·K)) |
|---|---|---|---|---|---|---|---|---|---|
| 17 | sloped alum no break | air | 13 | Double Glazing Low-E | 13 mm airspace e=0.20 | 0.2 | 2or3 | 2 | 3.96 |
| 17 | sloped alum thermal break | air | 13 | Double Glazing Low-E | 13 mm airspace e=0.20 | 0.2 | 2or3 | 2 | 4.25 |
| 17 | sloped structural glazing | air | 13 | Double Glazing Low-E | 13 mm airspace e=0.20 | 0.2 | 2or3 | 2 | 3.17 |
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