Section 141.0 Additions, Alterations and Repairs to Existing Nonresidential, High-Rise Residential, and Hotel/Motel Buildings, to Existing Outdoor Lighting, and to Internally and Externally Illuminated Signs
Additions, alterations, and repairs to existing nonresidential, high-rise residential, and hotel/motel buildings, existing outdoor lighting for these occupancies, and internally and externally illuminated signs, shall meet the requirements specified in Sections 100.0 through 110.10, and 120.0 through 130.5 that are applicable to the building project, and either the performance compliance approach (energy budgets) in Section 141.0(a)2 (for additions) or 141.0(b) 3 (for alterations), or the prescriptive compliance approach in Section 141.0(a)1 (for additions) or 141.0(b)2 (for alterations), for the Climate Zone in which the building is located. Climate zones are shown in Figure 100.1-A.
Covered process requirements for additions, alterations and repairs to existing nonresidential, high-rise residential, and hotel/motel buildings are specified in Section 141.1.
Exception to Section 141.0: Alterations to healthcare facilities are not required to comply with this Section.
NOTE: For alterations that change the occupancy classification of the building, the requirements specified in Section 141.0(b) apply to the occupancy after the alterations.
- Prescriptive approach. The envelope and lighting of the addition, any newly installed space-conditioning system, electrical power distribution system, or water-heating system; any addition to an outdoor lighting system; and any new sign installed in conjunction with an indoor or outdoor addition shall meet the applicable requirements of Sections 110.0 through 120.7, 120.9 through 130.5 and 140.2 through 140.9.
- The envelope and indoor lighting in the conditioned space of the addition, and any newly installed space-conditioning system, electrical power distribution system, or water-heating system, shall meet the applicable requirements of Sections 110.0 through 120.7, 120.9 through 130.5; and
- The addition alone shall comply with Section 140.1; or
- Existing plus addition plus alteration. The standard design for existing plus addition, plus alteration energy use is the combination of the existing building's unaltered components to remain, existing building altered components that are the more efficient, in TDV energy, of either the existing conditions, or the requirements of Section 141.0(b)2, plus the proposed addition's energy use meeting the requirements of Section 140.1. The proposed design energy use is the combination of the existing building's unaltered components to remain and the altered component's energy features, plus the proposed energy features of the addition.
- Roof/ceiling insulation. The opaque portions of the roof/ceiling that separate conditioned spaces from unconditioned spaces or ambient air shall meet the requirements of Section 141.0(b)2Biii.
- Metal building. A minimum of R-13 insulation between framing members, or the weighted average U-factor of the wall assembly shall not exceed U-0.113.
- Metal framed. A minimum of R-13 insulation between framing members, or the weighted average U-factor of the wall assembly shall not exceed U-0.217.
- Wood framed and others. A minimum of R-11 insulation between framing members, or the weighted average U-factor of the wall assembly shall not exceed U-0.110.
- Raised framed floors. A minimum of R-11 insulation between framing members, or the weighted average U-factor of the floor assembly shall not exceed the U-factor of U-0.071.
- Raised mass floors in high-rise residential and hotel/motel guest rooms. A minimum of R-6 insulation, or the weighted average U-factor of the floor assembly shall not exceed the U-factor of U-0.111.
- Raised mass floors in other occupancies. No minimum U-factor requirement.
- Low-sloped roofs in Climate Zones 1 through 16 shall have a minimum aged solar reflectance of 0.63 and a minimum thermal emittance of 0.75, or a minimum SRI of 75.
- Low-sloped roofs in Climate Zones 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.
- Existing roofs that are insulated with at least R-7 insulation or that have a U-factor lower than 0.089 are not required to meet the R-value requirement of Table 141.0-C.
- If mechanical equipment is located on the roof and will not be disconnected and lifted as part of the roof replacement, insulation added may be limited to the maximum insulation thickness that will allow a height of 8 inches (203 mm) from the roof membrane surface to the top of the base flashing.
- The penthouse or parapet walls are finished with an exterior cladding material other than the roofing covering membrane material; and
- The penthouse or parapet walls have exterior cladding material that must be removed to install the new roof covering membrane to maintain a base flashing height of 8 inches (203 mm); and
- For nonresidential buildings, the ratio of the replaced roof area to the linear dimension of affected penthouse or parapet walls shall be less than 25 square feet per linear foot for climate zones 2, and 10 through 16, and less than 100 square feet per linear foot for climate zones 1, and 3 through 9; and
- For high-rise residential buildings, hotels or motels, the ratio of the replaced roof area to the linear dimension of affected penthouse or parapet walls shall be less than 25 square feet per linear foot for all climate zones.
- Tapered insulation may be used which has a thermal resistance less than that prescribed in Table 141.0-C at the drains and other low points, provided that the thickness of insulation is increased at the high points of the roof so that the average thermal resistance equals or exceeds the value that is specified in Table 141.0-C.
- The measured duct leakage shall be equal to or less than 15 percent of the system air handler airflow as confirmed by field verification and diagnostic testing utilizing the procedures in Reference Nonresidential Appendix Section NA22.214.171.124.1; or
- If it is not possible to comply with the duct leakage criterion in Subsection 141.0(b)2Diia, then all accessible leaks shall be sealed and verified through a visual inspection and a smoke test performed by a certified HERS Rater utilizing the methods specified in Reference Nonresidential Appendix NA126.96.36.199.2.
- For all altered units where the existing thermostat does not comply with the requirements for demand responsive controls specified in Section 110.12, the existing thermostat shall be replaced with a demand responsive thermostat that complies with Section 110.12. All newly installed space-conditioning systems requiring a thermostat shall be equipped with a demand responsive thermostat that complies with Section 110.12; and
- The duct system that is connected to the new or replaced space-conditioning system equipment, shall be sealed, if the duct system meets the criteria of Sections 140.4(l)1, as confirmed through field verification and diagnostic testing in accordance with the applicable procedures for duct sealing of altered existing duct systems as specified in Reference Nonresidential Appendix NA2, and conforming to the applicable leakage compliance criteria in Section 141.0(b)2D.
- F. Spaces with lighting systems installed for the first time shall meet the requirements of Sections 110.9, 130.0, 130.1, 130.2, 130.4, 140.3(c), 140.6 and 140.7.
- G. When the requirements of Section 130.1(d) are triggered by the addition of skylights to an existing building and the lighting system is not recircuited, the daylighting control need not meet the multilevel requirements in Section 130.1(d).
- H. New internally and externally illuminated signs shall meet the requirements of Sections 110.9, 130.3 and 140.8.
- The alteration shall comply with the indoor lighting power requirements specified in Section 140.6 and the lighting control requirements specified in Table 141.0-F;
- The alteration shall not exceed 80% of the indoor lighting power requirements specified in Section 140.6, and shall comply with the lighting control requirements specified in Table 141.0-F; or
- The alteration shall be a one-for-one luminaire alteration within a building or tenant space of 5,000 square feet or less, the total wattage of the altered luminaires shall be at least 40% lower compared to their total pre-alteration wattage, and the alteration shall comply with the lighting control requirements specified in Table 141.0-F.
- In alterations that increase the connected lighting load, the added or altered luminaires shall meet the applicable requirements of Section 130.2(c) and the requirements of Section 140.7 for general hardscape lighting or for the specific lighting applications containing the alterations; and
- In parking lots and outdoor sales lots where the bottom of the luminaire is mounted 24 feet or less above the ground, the replacement luminaires shall comply with Section 130.2(c)1 AND Section 130.2(c)3;
- For all other lighting applications and where the bottom of the luminaire is mounted greater than 24 feet above the ground, the replacement luminaires shall comply with Section 130.2(c)1 AND EITHER comply with Section 130.2(c)2 or be controlled by lighting control systems, including motion sensors, that automatically reduce lighting power by at least 40 percent in response to the area being vacated of occupants; and
- N. Service water-heating systems shall meet the requirements of Section 140.5 except for the solar water heating requirements.
- O. A building shell for which interior walls or ceilings are installed for the first time shall meet the requirements of Section 140.3(c).
- Service electrical metering. New or replacement electrical service equipment shall meet the requirements of Section 130.5(a) applicable to the electrical power distribution system altered.
- Separation of electrical circuits for electrical energy monitoring. For entirely new or complete replacement of electrical power distribution systems, the entire system shall meet the applicable requirements of Section 130.5(b).
- Circuit controls for 120-volt receptacles and controlled receptacles. For entirely new or complete replacement of electrical power distribution systems, the entire system shall meet the applicable requirements of Section 130.5(d).
- The standard design for an altered component shall be the higher efficiency of existing conditions or the requirements of Section 141.0(b)2. For components not being altered, the standard design shall be based on the unaltered existing conditions such that the standard and proposed designs for these components are identical.
- When the third party verification option is specified, all components proposed for alteration, for which the additional credit is taken, must be verified. The Executive Director shall determine the qualifications required by the third party inspector.
- If an existing component must be replaced with a new component, that component is considered an altered component for the purpose of determining the energy budget and must therefore meet the requirements of Section 141.0(b)3.
- The standard design assumes the same geometry and orientation as the proposed design.
- Repairs. Repairs shall not increase the preexisting energy consumption of the repaired component, system or equipment.
|VT||See Table 140.3-B, C and D for all climate zones|
|Aged Solar Reflectance||Climate Zone 1, 3-9 U-factor||Climate Zone 2, 10-16 U-factor|
|NONRESIDENTIAL||HIGH-RISE RESIDENTIAL AND
GUEST ROOMS OF HOTEL/MOTEL BUILDINGS
|Climate Zone||Continuous Insulation
|Particulate Filtration Credit: MERV 9 through 12||0.5 in. of water|
|Particulate Filtration Credit: MERV 13 through 15||0.9 in. of water|
|ALTERED COMPONENT||STANDARD DESIGN WITHOUT THIRD-
PARTY VERIFICATION OF EXISTING
CONDITIONS SHALL BE BASED ON
|STANDARD DESIGN WITH THIRD-PARTY
VERIFICATION OF EXISTING CONDITIONS
SHALL BE BASED ON
|Roof/ceiling insulation, wall insulation, and floor/soffit insulation||The requirements of Section 141.0(b)1.|
The allowed glass area shall be the smaller of a. or b. below:
|The U-factor and RSHGC requirements of Table 141.0-A.||The existing U-factor and RSHGC levels.|
|Space-conditioning system equipment and ducts||The requirements of Sections 141.0(b)2C, 141.0(b)2Di or Section 141.0(b)2Dii, and Section 141.0(b)2E.|
|Window film||The U-factor of 0.40 and SHGC value of 0.35.||The existing fenestration in the alteration shall be based on Tables 110.6-A and 110.6-B.|
|Service water heating systems||The requirements of Section 140.5 without solar water heating requirements.|
|Roofing products||The requirements of Section 141.0(b)2B.|
|Lighting system||The requirements of Sections 141.0(b)2F through 141.0(b)2K.|
|All other measures||The proposed efficiency levels.|
|CONTROL SPECIFICATIONS||PROJECTS COMPLYING WITH SECTION 141.0(B)2II||PROJECTS COMPLYING WITH
SECTIONS 141.0(B)2III AND
|Manual Area Controls||130.1(a)1||Required||Required|
|130.1(a)3||Only required for new or completely replaced circuits||Only required for new or completely replaced circuits|
|Multi-Level Controls||130.1(b)||Required||Not Required|
|Automatic Shut Off Controls||130.1(c)1||Required; 130.1(c)1D only required for new or completely replaced circuits||Required; 130.1(c)1D only required for new or completely replaced circuits|
|Daylighting Controls||130.1(d)||Required||Not Required|
|Demand Responsive Controls||130.1(e)||Required||Not Required|