A building complies with this section by being designed with and having constructed and installed either: (1) envelope components that comply with each of the requirements in Subsection (a) for each individual component and the requirements of Subsection (c) where they apply; or (2) an envelope that complies with the overall requirements in Subsection (b) and the requirements of Subsection (c) where they apply.
1. Exterior roofs and ceilings. Exterior roofs and ceilings shall comply with each of the applicable requirements in this subsection:
A. Roofing Products. Shall meet the requirements of Section 110.8 and the applicable requirements of Subsections i through ii:
i. Nonresidential buildings:
a. Low-sloped roofs in Climate Zones 1 through 16 shall have:
1. A minimum aged solar reflectance of 0.63 and a minimum thermal emittance of 0.75; or
2. A minimum Solar Reflectance Index (SRI) of 75.
EXCEPTION 1 to Section 140.3(a)1Aia: Wood-framed roofs in Climate Zones 3 and 5 are exempt from the requirements of Section 140.3(a)1Aia if the roof assembly has a U-factor of 0.039 or lower.
EXCEPTION 2 to Section 140.3(a)1Aia: Metal building roofs in Climate Zones 3 and 5 are exempt from the requirements if the roof assembly has a U-factor of 0.048 or lower.
EXCEPTION 3 to Section 140.3(a)1Aia: Roof constructions that have thermal mass with a weight of at least 25 lb/ft² over the roof membrane are exempt from the requirements of Section 140.3(a)1Aia.
EXCEPTION 4 to SECTION 140.3(a)1Aia: An aged solar reflectance less than 0.63 is allowed provided the maximum roof/ceiling U-factor in TABLE 140.3 is not exceeded.
b. Steep-sloped roofs in Climate Zones 1 through 16 shall have a minimum aged solar reflectance of 0.20 and a minimum thermal emittance of 0.75, or a minimum SRI of 16.
ii. High-rise residential buildings and hotels and motels:
a. Low-sloped roofs in Climate Zones 9, 10, 11, 13, 14 and 15 shall have a minimum aged solar reflectance of 0.55 and a minimum thermal emittance of 0.75, or a minimum SRI of 64.
EXCEPTION to Section 140.3(a)1Aiia: Roof constructions that have thermal mass with a weight of at least 25 lb/ft² over the roof membrane .
b. Steep-sloped roofs in Climate Zones 2 through 15 shall have a minimum aged solar reflectance of 0.20 and a minimum thermal emittance of 0.75, or a minimum SRI of 16.
|
Nonresidential | |||||
|
Aged 'Solar Reflectance |
'Metal Building 1-16 U-factor |
Wood
framed Climate Zone 1 &5 U-factor |
Wood
Framed Climate Zone 2-4, 9-16 U-factor |
Wood
Framed 6 U-factor |
Wood Framed
7 & 8 U-factor |
|
0.62-0.60 |
0.061 |
0.045 |
0.036 |
0.065 |
0.059 |
|
0.59-0.55 |
0.054 |
0.041 |
0.034 |
0.058 |
0.053 |
|
0.54-0.50 |
0.049 |
0.038 |
0.032 |
0.052 |
0.048 |
|
0.49-0.45 |
0.047 |
0.035 |
0.030 |
0.047 |
0.044 |
|
0.44-0.40 |
0.043 |
0.033 |
0.028 |
0.043 |
0.040 |
|
0.39-0.35 |
0.039 |
0.031 |
0.027 |
0.039 |
0.037 |
|
0.34-0.30 |
0.035 |
0.029 |
0.025 |
0.037 |
0.035 |
|
0.29-0.25 |
0.033 |
0.027 |
0.024 |
0.034 |
0.032 |
EXCEPTION to Section 140.3(a)1A: Roof area covered by building integrated photovoltaic panels and building integrated solar thermal panels are not required to meet the minimum requirements for solar reflectance, thermal emittance, or SRI.
B. Roof Insulation. Roofs shall have an overall assembly U-factor no greater than the applicable value in Table 140.3- B, C or D, and where required by Section 110.8(e), insulation shall be placed in direct contact with a continuous roof or drywall ceiling.
2. Exterior Walls. Exterior walls shall have an overall assembly U-factor no greater than the applicable value in TABLE 140.3-B, C or D.
3. Demising Walls. Demising walls shall meet the requirements of Section 110.8(f).
4. Exterior Floors and Soffits. Exterior floors and soffits shall have an overall assembly U-factor no greater than the applicable value in TABLE 140.3-B, C or D.
5. Fenestration. Vertical Windows shall:
A. have (1) a west-facing area no greater than 40 percent of the gross west-facing exterior wall area, or 6 feet times the west-facing display perimeter, whichever is greater; and (2) a total area no greater than 40 percent of the gross exterior wall area, or 6 feet times the display perimeter, whichever is greater; and
EXCEPTION to Section 140.3(a)5A: Window area in demising walls is not counted as part of the window area for this requirement. Demising wall area is not counted as part of the gross exterior wall area or display perimeter for this requirement.
B. Have an area-weighted average U-factor no greater than the applicable value in TABLE140.3 -B, C or D.
EXCEPTION to Section 140.3(a)5B: For vertical fenestration containing chromogenic type glazing:
i. the lower-rated labeled U-factor shall be used with automatic controls to modulate the amount of heat flow into the space in multiple steps in response to daylight levels or solar intensity; and
ii. chromogenic glazing shall be considered separately from other fenestration; and
iii. area-weighted averaging with other fenestration that is not chromogenic shall not be permitted.
C. Have an area-weighted average Relative Solar Heat Gain Coefficient, RSHGC, excluding the effects of interior shading, no greater than the applicable value in TABLE 140.3-B, C or D.
For purposes of this paragraph, the Relative Solar Heat Gain Coefficient, RSHGC, of a vertical window is:
i. the solar heat gain coefficient of the window; or
ii. relative solar heat gain as calculated by EQUATION 140.3-A, if the window has an overhang that extends beyond each side of the window jamb by a distance equal to the overhang’s horizontal projection.
EXCEPTION 1 to Section 140.3(a)5C: An area-weighted average Relative Solar Heat Gain of 0.56 or less shall be used for windows:
a. that are in the first story of exterior walls that form a display perimeter; and
b. for which codes restrict the use of overhangs to shade the windows.
EXCEPTION 2 to Section 140.3(a)5C: For vertical fenestration containing chromogenic type glazing:
i. the lower-rated labeled RSHGC shall be used with automatic controls to modulate the amount of heat flow into the space in multiple steps in response to daylight levels or solar intensity; and
ii. chromogenic glazing shall be considered separately from other fenestration; and
iii. area-weighted averaging with other fenestration that is not chromogenic shall not be permitted.
D. Have an area-weighted average Visible Transmittance (VT) no less than the applicable value in TABLE 140.3-B and C, or EQUATION 140.3-B, as applicable.
EXCEPTION 1 to Section 140.3(a)5D: When the fenestration’s primary and secondary sidelit daylit zones are completely overlapped by one or more skylit daylit zones, then the fenestration need not comply with Section 140.3(a)5D.
EXCEPTION 2 to Section 140.3(a)5D: If the fenestration’s visible transmittance is not within the scope of NFRC 200, ASTM E972, or EQUATION 140.3-B, then the VT shall be calculated according to Reference Nonresidential Appendix NA6.
EXCEPTION 3 to Section 140.3(a)5D: For vertical fenestration containing chromogenic type glazing:
i. the higher rated labeled VT shall be used with automatic controls to modulate the amount of light transmitted into the space in multiple steps in response to daylight levels or solar intensity; and
ii. chromogenic glazing shall be considered separately from other fenestration; and
iii.
area-weighted averaging with other fenestration that is not chromogenic shall
not be permitted.
EQUATION 140.3-A RELATIVE SOLAR HEAT GAIN COEFFICIENT, RSHGC
WHERE:
|
RSHG |
= |
Relative solar heat gain. |
|
SHGCwin |
= |
Solar heat gain coefficient of the window. |
|
H |
= |
Horizontal projection of the overhang from the surface of the window in feet, but no greater than V. |
|
V |
= |
Vertical distance from the window sill to the bottom of the overhang in feet. |
|
a |
= |
-0.41 for north-facing windows, -1.22 for south-facing windows, and -0.92 for east and west-facing windows. |
|
b |
= |
0.20 for north-facing windows, 0.66 for south-facing windows, and 0.35 for east and west-facing windows. |
EQUATION 140.3-B Vertical fenestration minimum vt
WHERE:
|
WWR |
= |
Window Wall Ratio, the ratio of (i) the total window area of the entire building to (ii) the total gross exterior wall area of the entire building. If the WWR is greater than 0.40, then 0.40 shall be used as the value for WWR in EQUATION 140.3-B. |
|
VT |
= |
Visible Transmittance of framed window.
|
6. Skylights. Skylights shall:
A. Have an area no greater than 5 percent of the gross exterior roof area (SRR); and
EXCEPTION to Section 140.3(a)6A: Atria over 55 feet high shall have a skylight area no greater than 10 percent of the gross exterior roof area.
B.
Have an Area-Weighted Performance Rating U-factor no
greater than the applicable value in
TABLE 140.3-B, C or D.
EXCEPTION to Section 140.3(a)6B: For skylights containing chromogenic type glazing:
i. the lower-rate labeled U-factor shall be used with automatic controls to modulate the amount of U-factor heat flow into the space in multiple steps in response to daylight levels or solar intensity; and
ii. chromogenic glazing shall be considered separately from other skylights; and
iii. area-weighted averaging with other skylights that is not chromogenic shall not be permitted.
C. Have an area-weighted performance rating Solar Heat Gain Coefficient no greater than the applicable value in TABLE 140.3-B, C or D.
EXCEPTION to Section 140.3(a)6C: For skylights containing chromogenic type glazing:
i. the lower-rated labeled SHGC shall be used with automatic controls to modulate the amount of heat flow into the space in multiple steps in response to daylight levels or solar intensity; and
ii. chromogenic glazing shall be considered separately from other skylights; and
iii. area-weighted averaging with other skylights that are not chromogenic shall not be permitted.
D. Have an Area-Weighted Performance Rating VT no less than the applicable value in TABLE 140.3-B or C; and
EXCEPTION to Section 140.3(a)6D: For skylights containing chromogenic type glazing:
i. the higher-rated labeled VT shall be used with automatic controls to modulate the amount of light transmitted into the space in multiple steps in response to daylight levels or solar intensity and;
ii. chromogenic glazing shall be considered separately from other skylights; and
iii. area-weighted averaging with other skylights that are not chromogenic shall not be permitted.
E. Have a glazing material or diffuser that has a measured haze value greater than 90 percent, determined according to ASTM D1003, or other test method approved by the Energy Commission.
7. Exterior doors. All exterior doors that separate conditioned space from unconditioned space or from ambient air shall have a U-factor not greater than the applicable value in TABLE 140.3-B, C or D. Doors that are more than one-half glass in area are considered Glazed Doors.
8. Relocatable Public School Buildings. In complying with Sections 140.3(a)1 to 7 shall meet the following:
A. Relocatable public school buildings shall comply with TABLE 140.3-B for a specific Climate Zone when the manufacturer or builder of the relocatable public school building certifies that the building is intended for use only in a specific Climate Zone; or
B. Relocatable public school buildings shall comply with TABLE 140.3-D for any Climate Zone when the manufacturer or builder of the relocatable public school building certifies that the building is intended for use in any Climate Zone; and
C. The manufacturer or builder of a relocatable public school building shall certify that components of the building comply with requirements of this section by:
i. The placement of two (2) metal identification labels on the building, one mechanically fastened and visible from the exterior and the other mechanically fastened to the interior frame above the ceiling at the end of the module., both labels stating ('in addition’ to any other information by the Division of the State Architect or other law) "Complies with Title 24, Part 6 for all Climate Zones; and
ii. Identification of the location of the 2 labels on the plans submitted to the enforcing agency.
9. Air Barrier. To meet the requirement of TABLE 140.3-B, all buildings shall have a continuous air barrier that is designed and constructed to control air leakage into, and out of, the building’s conditioned space. The air barrier shall be sealed at all joints for its entire length and shall be composed of:
A. Materials that have an air permeance not exceeding 0.004 cfm/ft2, under a pressure differential of 0.3 in. w.g. (1.57 psf) (0.02 L/m2 at 75 pa), when tested in accordance with ASTM E2178; or
EXCEPTION to
Section 140.3(a)9A: Materials in TABLE 140.3-A
shall be deemed to comply with Section
140.3(a)9A provided if all joints are sealed and all of the materials are
installed as air barriers in accordance with the manufacturer's
instructions.
|
|
MATERIALS AND THICKNESS |
|
MATERIALS AND THICKNESS |
|
1 |
Plywood – min. 3/8 inches thickness |
9 |
Built up roofing membrane |
|
2 |
Oriented strand board – min. 3/8 inches thickness |
10 |
Modified bituminous roof membrane |
|
3 |
Extruded polystyrene insulation board – min. ½ inches thickness |
11 |
Fully adhered single-ply roof membrane |
|
4 |
Foil-back polyisocyanurate insulation board – min. ½ inches thickness |
12 |
A Portland cement or Portland sand parge, or a
gypsum plaster, each with min. 5/8 |
|
5 |
Closed cell spray foam with a minimum density of 2.0 pcf and a min. 2.0 inches thickness |
13 |
Cast-in-place concrete, or |
|
6 |
Open cell spray foam with a density no less than 0.4 pcf and no greater than 1.5 pcf, and a min. 5½ inches thickness |
14 |
Fully grouted concrete block masonry |
|
7 |
Exterior or interior gypsum board min. 1/2 inches thickness |
15 |
Sheet steel or sheet aluminum |
|
8 |
Cement board – min. 1/2 inches |
--- |
--------------------------------- |
A. Assemblies of materials and components that have an average air leakage not exceeding 0.04 cfm/ft2, under a pressure differential of 0.3 in. w.g (1.57 psf) (0.2 L/m2 at 75 pa), when tested in accordance with ASTM E2357, ASTM E1677, ASTM E1680, or ASTM E283; or
EXCEPTION to Section 140.3(a)9B: The following materials shall be deemed to comply with Section 140.3(a)9B. If all joints are sealed and all of the materials are installed as air barriers in accordance with the manufacturer's instructions:
i. Concrete masonry walls that have at least two coatings of paint or at least two coatings of sealer coating.
ii. Concrete masonry walls with integral rigid board insulation.
iii. Structurally Insulated Panels.
iv. Portland cement or Portland sand parge, or stucco, or a gypsum plaster, each with min. 1/2 inches thickness
B. The entire building has an air leakage rate not exceeding 0.40 cfm/ft2 at a pressure differential of 0.3 in w.g. (1.57 psf) (2.0 L/ m2 at 75 pa), when the entire building is tested, after completion of construction, in accordance with ASTM E779 or another test method approved by the Commission.
EXCEPTION to Section 140.3(a)9: Relocatable Public School Buildings.
|
|
Climate Zone | |||||||||||||||||||
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 | |||||
|
'Envelope |
Maximum 'U-factor |
Roofs/ Ceilings |
Metal 'Building |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 | |
|
Wood Framed and Other |
0.049 |
0.039 |
0.039 |
0.039 |
0.049 |
0.075 |
0.067 |
0.067 |
0.039 |
0.039 |
0.039 |
0.039 |
0.039 |
0.039 |
0.039 |
0.039 | ||||
|
Walls |
Metal Building
|
0.113 |
0.061 |
0.113 |
0.061 |
0.061 |
0.113 |
0.113 |
0.061 |
0.061 |
0.061 |
0.061 |
0.061 |
0.061 |
0.061 |
0.057 |
0.061 | |||
|
Metal-framed |
0.098 |
0.062 |
0.082 |
0.062 |
0.062 |
0.098 |
0.098 |
0.062 |
0.062 |
0.062 |
0.062 |
0.062 |
0.062 |
0.062 |
0.062 |
0.062 | ||||
|
Mass Light1 |
0.196 |
0.170 |
0.278 |
0.227 |
0.440 |
0.440 |
0.440 |
0.440 |
0.440 |
0.170 |
0.170 |
0.170 |
0.170 |
0.170 |
0.170 |
0.170 | ||||
|
Mass Heavy1 |
0.253 |
0.650 |
0.650 |
0.650 |
0.650 |
0.690 |
0.690 |
0.690 |
0.690 |
0.650 |
0.184 |
0.253 |
0.211 |
0.184 |
0.184 |
0.160 | ||||
|
Wood-framed and Other |
0.102 |
0.059 |
0.110 |
0.059 |
0.102 |
0.110 |
0.110 |
0.102 |
0.059 |
0.059 |
0.059 |
0.059 |
0.059 |
0.059 |
0.042 |
0.059 | ||||
|
Floors/ Soffits |
Mass |
0.092 |
0.092 |
0.269 |
0.269 |
0.269 |
0.269 |
0.269 |
0.269 |
0.269 |
0.269 |
0.092 |
0.092 |
0.092 |
0.092 |
0.092 |
0.058 | |||
|
Other |
0.048 |
0.039 |
0.071 |
0.071 |
0.071 |
0.071 |
0.071 |
0.071 |
0.071 |
0.071 |
0.039 |
0.071 |
0.071 |
0.039 |
0.039 |
0.039 | ||||
|
Roofing Products |
Low-sloped |
Aged 'Solar Reflectance |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 |
0.63 | ||
|
Thermal Emittance |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 | ||||
|
Steep- sloped |
Aged Solar Reflectance |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 | |||
|
Thermal Emittance |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0. 75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 | ||||
|
Air Barrier |
NR |
NR |
NR |
NR |
NR |
NR |
NR |
NR |
NR |
REQ |
REQ |
REQ |
REQ |
REQ |
REQ |
REQ | ||||
|
Exterior Doors, Maximum U-factor |
Non-Swinging |
0.50 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
0.50 | |||
|
Swinging |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 | ||||
|
Envelope |
Fenestration |
|
All 'Climate Zones | |||||
|
|
Fixed |
Operable |
Curtainwall
or |
Glazed Doors | ||||
|
Vertical |
Area-Weighted Performance Rating |
Max |
0.36 |
0.46 |
0.41 |
0.45 | ||
|
Max RSHGC |
0.25 |
0.22 |
0.26 |
0.23 | ||||
|
Area-Weighted Performance Rating |
Min VT |
0.42 |
0.32 |
0.46 |
0.17 | |||
|
Maximum WWR% |
40% | |||||||
|
Skylights |
|
|
Glass, Curb Mounted |
Glass, Deck Mounted |
Plastic, Curb Mounted | |||
|
Area-Weighted Performance Rating |
Max |
0.58 |
0.46 |
0.88 | ||||
|
Max SHGC |
0.25 |
0.25 |
NR | |||||
|
Area-Weighted Performance Rating |
Min VT |
0.49 |
0.49 |
0.64 | ||||
|
Maximum SRR% |
5% | |||||||
|
|
Climate Zone | ||||||||||||||||||
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 | ||||
|
'Envelope |
Maximum U-factor |
Roofs/ Ceilings |
'Metal Building |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
0.065 |
|
Wood Framed and Other |
0.034 |
0.028 |
0.039 |
0.028 |
0.039 |
0.039 |
0.039 |
0.028 |
0.028 |
0.028 |
0.028 |
0.028 |
0.028 |
0.028 |
0.028 |
0.028 | |||
|
Walls |
Metal Building |
0.061 |
0.061 |
0.061 |
0.061 |
0.061 |
0.061 |
0.061 |
0.061 |
0.061 |
0.061 |
0.057 |
0.057 |
0.057 |
0.057 |
0.057 |
0.057 | ||
|
Metal-framed |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 |
0.105 | |||
|
Mass Light1 |
0.170 |
0.170 |
0.170 |
0.170 |
0.170 |
0.227 |
0.227 |
0.227 |
0.196 |
0.170 |
0.170 |
0.170 |
0.170 |
0.170 |
0.170 |
0.170 | |||
|
Mass Heavy1 |
0.160 |
0.160 |
0.160 |
0.184 |
0.211 |
0.690 |
0.690 |
0.690 |
0.690 |
0.690 |
0.184 |
0.253 |
0.211 |
0.184 |
0.184 |
0.160 | |||
|
Wood-framed and Other |
0.059 |
0.059 |
0.059 |
0.059 |
0.059 |
0.059 |
0.059 |
0.059 |
0.059 |
0.059 |
0.042 |
0.059 |
0.059 |
0.042 |
0.042 |
0.042 | |||
|
|
|
Floors/ Soffits |
Mass |
0.045 |
0.045 |
0.058 |
0.058 |
0.058 |
0.069 |
0.092 |
0.092 |
0.092 |
0.069 |
0.058 |
0.058 |
0.058 |
0.045 |
0.058 |
0.037 |
|
Other |
0.034 |
0.034 |
0.039 |
0.039 |
0.039 |
0.039 |
0.071 |
0.039 |
0.039 |
0.039 |
0.039 |
0.039 |
0.039 |
0.034 |
0.039 |
0.034 | |||
|
Roofing Products |
Low-sloped |
Aged Solar Reflectance |
NR |
NR |
NR |
NR |
NR |
NR |
NR |
NR |
0.55 |
0.55 |
0.55 |
NR |
0.55 |
0.55 |
0.55 |
NR | |
|
Thermal Emittance |
NR |
NR |
NR |
NR |
NR |
NR |
NR |
NR |
0.75 |
0.75 |
0.75 |
NR |
0.75 |
0.75 |
0.75 |
NR | |||
|
Steep- Sloped |
Aged 'Solar Reflectance |
NR |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
NR | ||
|
Thermal Emittance |
NR |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
0. 75 |
0.75 |
0.75 |
0.75 |
0.75 |
0.75 |
NR | |||
|
|
Exterior Doors, Maximum U-factor |
Non-Swinging |
0.50 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
1.45 |
0.50 | |
|
Swinging |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 |
0.70 | |||
|
Envelope |
Fenestration |
|
All 'Climate Zones | |||||
|
|
Fixed |
Operable |
Curtainwall/ |
Glazed Doors | ||||
|
Vertical |
Area-Weighted Performance Rating |
Max |
0.36 |
0.46 |
0.41 |
0.45 | ||
|
Max RSHGC |
0.25 |
0.22 |
0.26 |
0.23 | ||||
|
Area-Weighted Performance Rating |
Min VT |
0.42 |
0.32 |
0.46 |
0.17 | |||
|
Maximum WWR% |
40% | |||||||
|
Skylights |
|
|
Glass, Curb Mounted |
Glass, Deck Mounted |
Plastic, Curb Mounted | |||
|
Area-Weighted Performance Rating |
Max
|
0.58 |
0.46 |
0.88 | ||||
|
Max SHGC |
0.25 |
0.25 |
NR | |||||
|
Area-Weighted Performance Rating |
Min VT |
0.49 |
0.49 |
0.64 | ||||
|
Maximum SRR% |
5% | |||||||
|
Notes: | ||||||||
|
1. Light mass walls are walls with a heat capacity of at least 7.0 Btu/ft²-oF and less than 15.0 Btu/ft²-oF. Heavy mass walls are walls with a heat capacity of at least 15.0 Btu/ft²-oF. | ||||||||
|
Roofs/Ceilings | |||
|
Roofs of Metal Buildings |
Maximum U-factor 0.048 | ||
|
Roofs of all non-Metal Buildings |
Maximum U-factor 0.039 | ||
|
Roofing Products – Aged Reflectance/Emittance |
| ||
|
0.63/0.75 | |||
|
0.20/0.75 | |||
|
Walls | |||
|
Walls of Wood frame buildings |
Maximum U-factor 0.059 | ||
|
Walls of Metal frame buildings |
Maximum U-factor 0.062 | ||
|
Walls of Metal buildings |
Maximum U-factor 0.057 | ||
|
Walls of Mass/7.0≤ HC, any building |
Maximum U-factor 0.170 | ||
|
All Other Walls |
Maximum U-factor 0.059 | ||
|
Floors and soffits of all buildings |
Maximum U-factor 0.048 | ||
|
Windows of all buildings | |||
|
U-factor |
Maximum U-factor 0.47 | ||
|
RSHGC |
Maximum RSHGC 0.26 | ||
|
Glazed Doors, all Buildings | |||
|
Max Average Weighted U-factor |
0.45 | ||
|
Max Average Weighted RSHGC |
0.23 | ||
|
Exterior Doors, all buildings | |||
|
Non-Swinging doors |
Maximum U-factor 0.50 | ||
|
Swinging doors |
Maximum U-factor 0.70 | ||
|
Skylights | |||
|
Glass with Curb |
Maximum U-factor 0.99 | ||
|
Glass without Curb |
Maximum U-factor 0.57 | ||
|
Plastic with Curb |
Maximum U-factor 0.87 | ||
|
Glass Skylights |
0-2% SRR |
Maximum SHGC 0.46 | |
|
|
2.1-5% SRR |
Maximum SHGC 0.36 | |
|
Plastic Skylights |
0-2% SRR |
Maximum SHGC 0.69 | |
|
|
2.1-5% SRR |
Maximum SHGC 0.57 | |
In Climate Zones 2 through 15, conditioned enclosed spaces, and unconditioned enclosed spaces, that are greater than 5,000 ft² and that are directly under a roof with ceiling heights greater than 15 feet, shall meet the following requirements:
1. A combined total of at least 75 percent of the floor area, as determined in building floor plan (drawings) view, shall be within one or more of the following:
A. Primary Sidelight Daylight Zone in accordance with Section 130.1(d)1B, or
B. Skylit Daylit Zone in accordance with Section 130.1(d)1A.
2. All Skylit Daylit Zones and Primary Sidelit Daylit Zones shall be shown on building plans.
3. General lighting in daylit zones shall be controlled in accordance with Section 130.1(d).
4. Skylights shall:
A. Have a glazing material or diffuser that has a measured haze value greater than 90 percent, tested according to ASTM D1003 (notwithstanding its scope) or another test method approved by the Commission; and
B. If the space is conditioned, meet the requirements in Section 140.3(a)6.
EXCEPTION 1 to Section 140.3(c): Auditoriums, churches, movie theaters, museums, and refrigerated warehouses.
EXCEPTION 2 to Section 140.3(c): In buildings with unfinished interiors, future enclosed spaces for which there are plans to have:
A. A floor area of less than or equal to 5,000 square feet; or
B. Ceiling heights of less than or equal to 15 feet. This exception shall not be used for S-1 or S-2 (storage), or for F-1 or F-2 (factory) occupancies.
EXCEPTION 3 to Section 140.3(c): Enclosed spaces having a designed general lighting system with a lighting power density less than 0.5 watts per square foot.