skylight products should be used only in cooling
dominated climates and be dependent upon qualifying
for the Southern climate zone as determined by the
DOE Energy Star Windows program. Certain products
that have aluminum frames and/or thermally improved
aluminum frames may qualify for the Central and
Northern Climate Zones.
**************************************************************************
Thermal transmittance for skylights with insulating glass shall not exceed
a U-factor of [4.3 W/m2K0.75 Btu/hr-ft2-F when determined using NFRC 100,
and a SHGC of 2.3 W/m2K0.40 Btu/hr-ft2-F when determined using NFRC 200.
Selection and use of the skylight products in this category should be used
in the Southern Climate Zone] [2.6 W/m2K0.45 Btu/hr-ft2-F when determined
using NFRC 100, and a SHGC of 3.1 W/m2K0.55 Btu/hr-ft2-F when determined
using NFRC 200. Selection and use of the skylight products in this
category shall be used in a climate where heating and cooling are basically
equally used and be dependent upon qualifying for the Central Climate Zone]
[2.6 W/m2K0.45 Btu/hr-ft2-F when determined using NFRC 100. Selection and
use of the skylight products in this category shall be used in
predominately heating dominated climates and be dependent upon qualifying
for the Northern Climate Zone] as determined by the DOE Energy Star Windows
program.
2.4.4
Condensation Index Rating
**************************************************************************
NOTE: Determination of the resistance of the
skylight unit to the formation of condensation in
any form, referred to as the Condensation Index,
should be accomplished using the NFRC approved
software tool THERM. Refer to paragraph
Condensation Index Rating in Section 08550 WOOD
WINDOWS for examples and guidance.
**************************************************************************
The condensation index rating shall be [_____] as determined using National
Fenestration Rating Council approved software THERM.
2.5
SKYLIGHT SYSTEMS
**************************************************************************
NOTE: A wide variety of skylight configurations,
features, fastening systems, and accessories is
commercially available. Unique details of the roof
system, which could affect the skylight
installation, will be shown on the contract
drawings. It is not possible to indicate all
possible combinations and selections which may be
utilized in adapting this guide specification to a
particular project; therefore, careful editing is
necessary to assure that the project is properly and
adequately specified.
Since the skylight becomes an integral element of
the roofing system after installation, it must meet
or exceed the roof requirements for fire protection,
insulation value, energy efficiency rating, thermal
SECTION 08600
Page 11
Previous Page
