A5.205.1 Fenestration Products and Exterior Doors
DEFAULT FENESTRATION PRODUCT U-FACTORS
|FRAME||PRODUCT TYPE||SINGLE PANE U-FACTOR||DOUBLE PANE1 U-FACTOR||GLASS BLOCK2 U-FACTOR|
|Metal, thermal break||Operable||N.A.||0.66||N.A.|
N.A. = Not applicable.
- Add 0.05 for products with dividers between panes if spacer is less than 7/16 inch wide.
- Add 0.05 to any product with true divided lite (dividers through the panes).
- Translucent or transparent panels shall use glass blocks.
DEFAULT SOLAR HEAT GAIN COEFFICIENT (SHGC)
|FRAME||PRODUCT TYPE||GLAZING||TOTAL WINDOW SHGC|
|Single Pane||Double Pane||Glass Block1|
|Metal, thermal break||Operable||Clear||N.A.||0.63||N.A.|
N.A. = Not applicable.
- Translucent or transparent panels shall use glass block values.
A fenestration product's U-factor shall be rated in accordance with NFRC 100 or the applicable default U-factor set forth in Table A.5.205.1-A.
Exception: If the fenestration product is a skylight or is site-built fenestration in a building covered by the nonresidential standards with less than 10,000 square feet of site-built fenestration, the default U-factor may be calculated as set forth in Reference Nonresidential Appendix NA6 of the California Energy Commission 2008 Building Energy Efficiency Standards for Residential and Nonresidential Buildings.
A fenestration product's SHGC shall be rated in accordance with NFRC 200 for site-built fenestration or use the applicable default SHGC set forth in Table A5.205.1-B.
Exception: If the fenestration product is a skylight or is site-built fenestration in a building covered by the nonresidential standards with less than 10,000 square feet of site-built fenestration, the default SHGC may be calculated as set forth in Reference Nonresidential Appendix NA6 of the California Energy Commission 2008 Building Energy Efficiency Standards for Residential and Nonresidential Buildings.
Fenestration products shall:
- Have a temporary label (or label certificate for site- built fenestration) meeting the requirements of Section 10-111(a)1 of Title 24, Part 1 not to be removed before inspection by the enforcement agency, listing the certified U-factor and SHGC and certifying that the air leakage requirements of Section A220.127.116.11.1 are met for each product line; and
- Have a permanent label (or label certificate for site-built fenestration) meeting the requirements of Section 10-111(a)2 of Title 24, Part 1 if the product is rated using NFRC procedures.
Before an occupancy permit is granted, site-built fenestration products in other than low-rise residential buildings shall be certified as meeting the Acceptance Requirements for Code Compliance, as specified by the Reference Nonresidential Appendix NA7 of the California Energy Commission 2008 Building Energy Efficiency Standards for Residential and Nonresidential Buildings to ensure that site-built fenestration meet Standards requirements, including a matching label certificate for each product installed and be readily accessible at the project location. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the fenestration product meets the acceptance requirements.
Exception: Fenestration products removed and reinstalled as part of a building alteration or addition.
Field-fabricated fenestration and field-fabricated exterior doors may be installed only if the compliance documentation has demonstrated compliance for the installation using U-factors from Table A5.205.1-A and SHGC values from Table A5.205.1-B. Field-fabricated fenestration and field-fabricated exterior doors shall be caulked between the fenestration products or exterior door and the building and shall be weatherstripped.
Exception: Unframed glass doors and fire doors need not be weatherstripped or caulked.