Edge-of-divider area Ade = Center-of-glazing U-factor Uc = Center-of-glazing area Ac = Figures None Swinging Doors This section presents additional details specific to side-hinged exterior door systems. This section presents and references methods for determining specific side-hinged exterior door system heat transfer properties or quantities used in the determination of these properties. At this time, the scope of these properties is limited to total door system U-factor. Variations from Standard Product Lines A given series of entrance door systems is defined by skin material, core material, and edge-of-door construction that differ only in: Size; Panel and cut out configurations; The replacement of core and/or panel area with glazing system; Center-of-lite characteristics and edge-of-lite characteristics, such as glazing types, gap widths, glazing lite areas, use of dividers, use of spacers, glazing coatings, gas fills; Opening/non-opening configurations, e.g. X, O, XX, XO, OXXO etc; In-swing or out-swing operation; Door slab changes where one component of the same physical shape with a thermal conductivity that does not differ by more than a factor of 10; Frame components, e.g. headers, jambs and threshold; and Variations in frame and/or door interior/exterior finish, paint, varnish, or stain do not constitute different product lines provided that each of these variations does not change the surface emittance by more than 0.10. Variations from Standard Individual Products Products with multiple sill options, where the sill design changes to accommodate different installation requirements, made of the same materials type shall be different individual products within the same product line.
Ade = Edge-of-divider area Uc = Center-of-glazing U-factor Ac = Center-of-glazing area Figures None Swinging Doors This section presents additional details specific to side-hinged exterior door systems. This section presents and references methods for determining specific side-hinged exterior door system heat transfer properties or quantities used in the determination of these properties. At this time, the scope of these properties is limited to total door system U-factor. Variations from Standard Product Lines A given series of entrance door systems is defined by skin material, core material, and edge-of-door construction that differ only in: Size; Panel and cut out configurations; The replacement of core and/or panel area with glazing system; Center-of-lite characteristics and edge-of-lite characteristics, such as glazing types, gap widths, glazing lite areas, use of dividers, use of spacers, glazing coatings, gas fills; Opening/non-opening configurations, e.g. X, O, XX, XO, OXXO etc; In-swing or out-swing operation; Door slab changes where one component of the same physical shape with a thermal conductivity that does not differ by more than a factor of 10; Frame components, e.g. headers, jambs and threshold; and Variations in frame and/or door interior/exterior finish, paint, varnish, or stain do not constitute different product lines provided that each of these variations does not change the surface emittance by more than 0.10. Variations from Standard Individual Products Products with multiple sill options, where the sill design changes to accommodate different installation requirements, made of the same materials type shall be different individual products within the same product line.
NFRC_100-2014_E0A0.docx