Kauai energy code changes for buildings and homes

Amending Section C101.1 Title. Section C101.1 is amended to read:C101.1 Title. This code shall be known as the Energy Conservation Code of the County of Kaua'i, and shall be cited as such. It is referred to herein as "this code."Amending Section C103.1 General. Section C103.1 is amended to read:C103.1 General. Construction documents and other supporting data shall be submitted to indicate compliance with this code. The construction documents shall be prepared, designed, approved, and observed by a duly registered licensed professional as required by Chapter 464 of the Hawai'i Revised Statutes. The responsible design professional shall provide on the plans a signed statement certifying that the project is in compliance with this code.Exceptions:1.Any building, electrical or plumbing work that is no required to be prepared, designed, approved or observed by a licensed design professional architect or engineer pursuant to Chapter 464 Hawai'i Revised Statutes shall be certified by the owner.2.Specifications and necessary computations need not be submitted when authorized by the Building Official.Amending Section C103.3.1 Approval of construction documents. Section C103.3.1 is amended to read:C103.3.1 Approval of construction documents. Approval of construction documents shall comply with the provisions of Chapter 1 of the International Building Code, as amended by Chapter 12 of the K.C.C. 1987, as amended.Deleting Section C103.3.3 Phased approval. Section C103.3.3 is deleted in its entirety.Amending Section C103.5 Retention of construction documents. Section C103.5 is amended to read:C103.5 Retention of construction documents. Retention of construction documents shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Deleting Section C103.6 Building documentation and closeout submittal requirements. Section C103.6 is deleted in its entirety.Amending SECTION C104 FEES. SECTION C104 is deleted in its entirety and replaced with the following:SECTION C104 FEESC104.1 General. Fees shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Amending SECTION C105 INSPECTIONS. SECTION C105 is deleted in its entirety and replaced with the following:SECTION C105 INSPECTIONSC105.1 General. Inspections shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Amending SECTION C108 STOP WORK ORDER. SECTION C108 is deleted in its entirety and replaced with the following:SECTION C108 STOP WORK ORDERC108.1 General. Stop Work Orders shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Amending SECTION C109 BOARD OF APPEALS. SECTION C109 is deleted in its entirety and replaced with the following:SECTION C109 BOARD OF APPEALSC109.1 General. All cases of appeals shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Adding Exception to Section C401.2 Application. Exception is added to read:Exception: Where it is determined by the Building Official that the building configuration is similar to that of a residential building, the requirements in Section R401.2.1 Tropical Zone shall be permitted to be used.Adding Section C401.2.2 Low-energy use buildings. Section C401.2.2 is added to read:C401.2.2 Low-energy use buildings. The following low-energy use buildings, or portions thereof separated from the remainder of the building by building thermal envelope assemblies complying with this section, shall be exempt from the building thermal envelope provisions of Section C402.1.Those with a peak design rate of energy usage less than 3.4 Btu/hft2 (10.7 W/m2) or 1.0 watt per square foot (10.7 W/m2) of floor area for space conditioning purposes.2.Unconditioned space that does not contain habitable space.3.Greenhouses.Amending TABLE C402.1.3 OPAQUE THERMAL ENVELOPE INSULATION COMPONENT MINIMUM REQUIREMENTS, R-VALUE METHODa,i. Table C402.1.3 is amended by adding the following footnote:CLIMATE ZONE 1, Mass walls, r-5.7 ci (footnote j)j. Mass walls 6" and greater in thickness are exempt from ci requirement.Amending Section C402.2.2 Above-grade walls. Section C402.2.2 is deleted in its entirety and amended to read:C402.2.2 Above-grade walls. The minimum thermal resistance (R-value) of materials installed in the wall cavity between framing members and continuously on the walls shall be as specified in Table C402.1.3, based on framing type and construction materials used in the wall assembly.Exceptions:Continuous insulation for above grade walls and mass walls are not required when one of the following conditions are met:1.Walls have a covering with a reflectance of ≥ 0.64; or2.Walls have overhangs with a projection factor equal to or greater than 0.3. The projections factor is the horizontal distance from the surface of the wall to the farthest most point of the overhang divided by the vertical distance from the first-floor level to the bottom most point of the overhang.3.Concrete, CMU and similar mass walls are 6 inches or greater in thickness.Amending Table C402.4 BUILDING ENVELOPE FENESTRATION MAXIMUM U-FACTOR AND SHGC REQUIREMENTS. Table C402.4 is amended by adding the following footnote:b. Jalousie windows are exempt from SHGC requirements.Adding Section C402.4.3.5 Area-weighted SHGC. Section C402.3.5 is added to read:C402.3.5 Area-weighted SHGC. In commercial buildings, an area-weighted average of fenestration products shall be permitted to satisfy SHGC requirements.Adding Section C403.2.3 Door switches. Section C403.2.3 is added to read:C403.2.3 Door switches. Opaque and glass doors opening to the outdoors in hotel and motel sleeping units, guest suites and time-share condominiums, shall be provided with controls that disable the mechanical cooling, or reset the cooling setpoint to 90°F or greater within five minutes of the door opening. Mechanical cooling may remain enabled if the outdoor air temperature is below the space temperature.Adding Section C405.10 Sub-metering. Section C405.10 is added to read:C405.10 Sub-metering. In new buildings with tenants, metering shall be collected for the entire building and individually for each tenant occupying 1,00 ft2 (total enclosed and unenclosed) (93 m2) or more. Tenants shall have access to data collected for their space. A tenant is defined as "one who rents or leases from a landlord."Amending Section C501.4 Compliance. Section 501.4 is amended to read:C501.4 Compliance. Alterations, repairs, additions and changes of occupancy to, or relocation of, existing buildings and structures shall comply with the provisions and regulations for alterations, repairs, additions and changes of occupancy or relocation, as adopted by the authorities having jurisdiction.Amending Section C503.3.1 Roof replacement. Section C503.3.1 is amended to read:Roof replacement shall comply with Section C402.1.3, C402.1.4, C402.1.5 or C407 where the existing roof assembly is part of the building thermal envelope and contains insulation entirely above the roof deck. Replacement of uninsulated roofs shall include either initial reflectance ≥ 85% and aged reflectance ≥ 63% or at least one of the following:EnergyStar compliant coveringRadiant barrier, orAttic ventilation via solar fan(s), ridge ventilation or gable ventsOne or more exceptions in Section C402.3.Amending Section R101.1 Title. Section R101.1 is amended to read:R101.1 Title. This code shall be known as the Energy Conservation Code of the County of Kaua'i, and shall be cited as such. It is referred to herein as "this code."Amending Section R103.1 General. Section R103.1 is deleted in its entirety and amended to read:R103.1 General. Construction documents and other supporting data shall be submitted to indicate compliance with this code. The construction documents shall be prepared, designed, approved, and observed by a duly registered licensed professional as required by Chapter 464 of the Hawai'i Revised Statutes. The responsible design professional shall provide on the plans a signed statement certifying that the project is in compliance with this code.Exceptions:1.Any building, electrical or plumbing work that is not required to be prepared, designed, approved, or observed by a licensed professional architect or engineer pursuant to Chapter 464, Hawai'i Revised Statutes shall be certified by the owner.2.Specifications and necessary computations need not be submitted when authorized by the Building Official.Amending Section R103.3.1 Approval of construction documents. Section R103.3.1 is amended to read:R103.3.1 Approval of construction documents. Approval of construction documents shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Deleting Sections R103.3.2 Previous approvals and R103.3.3 Phased approval. Sections R103.3.2 and R103.3.3 are deleted in their entirety.Amending SECTION R104 FEES. SECTION R104 is deleted in its entirety and replaced with the following:SECTION R104 FEESR104.1 General. Fees shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Amending SECTION R105 INSPECTIONS. SECTION R105 is deleted in its entirety and replaced with the following:SECTION R105 INSPECTIONSR105.1 General. Inspections shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Amending SECTION R108 STOP WORK ORDER. SECTION R108 is deleted in its entirety and replaced with the following:SECTION R108 STOP WORK ORDERR108.1 General Stop Work Orders shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Amending SECTION R109 BOARD OF APPEALS. SECTION R109 is deleted in its entirety and replaced with the following:SECTION R109 BOARD OF APPEALSR109.1 General. All cases of appeals shall comply with the provisions of Chapter 1 of the International Building Code, as amended in Chapter 12 of the K.C.C. 1987, as amended.Amending Section R401.2 Compliance. Section R401.2 is amended to read:R401.2 Compliance. Projects shall comply with one of the following:Sections R401.3 through R404Sections R405 and the provisions of Section R401 through R404 labeled "Mandatory."An energy rating index (ERI) approach in Section R406.The Tropical zone requirements in Section R401.2.1.Amending Section R401.2.1 Tropical zone. Section R401.2.1 is amended to read:R401.2.1 Tropical zone. Residential buildings in the tropical zone at elevations below 2,400 feet (731.5 m) above sea level shall be deemed to comply with this chapter where the following conditions are met:Not more than one-half of the dwelling unit is air conditioned.The dwelling unit is not heated.Solar, wind or other renewable energy source supplies not less than 90 percent of the energy for service water heating.Glazing in dwelling units shall have a maximum solar heat gain coefficient as specified in Table R402.1.2.Skylights in dwelling units shall have a maximum U-factor as specified in Table R402.1.4.Permanently installed lighting is in accordance with Section R404.The roof/ceiling complies with one of the following options:Comply with one of the roof surface options in Table C402.3 and install R-13 insulation or greater.Install R-19 insulation or greater.Roof surfaces have a minimum slope of 1/4 inch per foot of run. The finished roof does not have water accumulation areas.Operable fenestration provides ventilation area equal to not less than 14 percent of the floor area in each room. Alternatively, equivalent ventilation is provided by a ventilation fan.Bedrooms with exterior walls facing two different directions have operable fenestration or exterior walls facing two different directions.Interior doors to bedrooms are capable of being secured in the open position.A ceiling fan or ceiling fan rough-in is provided for bedrooms and the largest space that is not used as a bedroom.Walls, floors and ceilings separating air conditioned spaces from non-air conditioned spaces shall be constructed to limit air leakage in accordance with the requirements in Table R402.4.1.1.Adding Section R401.3.1 Sampling. Section R401.3.1 is added to read:R401.3.1 Sampling. For builders of multiple single family and multi-family units of similar construction type and envelope systems (i.e. production home building), air infiltration/duct testing may be completed by following Chapter 6 ("Standard for Sampled Ratings"), of the current Residential Energy Service Network (RESNET) National Home Energy Rating System Standards.Amending Table R402.1.2 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT. Table R402.1.2 is amended by adding the following:Window SHGC RequirementsProjection Factor of overhand from base of average window willSHGC< .30.25.30 - .50.40≥ .50N/AException: North-facing windows with pf > .20 are exempt from the SHGC requirement.Overhangs shall extend 2 feet on each side of window or to nearest wall, whichever is less.Amending Table R402.1.2 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT. Table R402.1.2 is amended to read: Climate Zone 1Mass Wall R-Value: 3/4 or NRj.j Exception: R-value for mass walls are not required if mass walls meet one of the following requirements:1.have a reflectance of ≥ 0.64.2.have overhangs with a projection factor ≥ 0.3.3.are ≥ 6 inches in thickness.Amending Section R402.2 Specific insulation requirements (Prescriptive). Section R402.2 is amended to read:R402.2 Specific insulation requirements (Prescriptive). In addition to the requirements of Section R402.1, insulation shall meet the specified requirements of Sections R402.2.1 through R402.2.13.Exceptions:1.Above-grade walls and roof/ceilings shall be permitted to comply with Section R407.2.Insulation requirement for open-beam ceiling shall be optional.Amending Section R402.2.5 Mass walls. Section R402.2.5 is amended to read:R402.2.5 Mass walls. Mass walls where used as a component of the building thermal envelope shall be one of the following:Above-ground walls of concrete block, (concrete masonry units) CMU, concrete, insulated concrete form, masonry cavity, brick but not brick veneer, adobe, compressed earth block, rammed earth, solid timber or solid logs.Any wall having a heat capacity greater than or equal to 6 Btu/ft2 · °F (123 kJ/m2 · K).Concrete, CMU and similar mass walls are 6 inches or greater in thickness.Amending Section R402.3.2 Glazed fenestration SHGC. Section R402.3.2 amends the following exceptions:Exceptions:1.Dynamic glazing shall not be required to comply with this section where both the lower and higher labeled SGHC comply with the requirements of Table R402.1.2.2.Jalousie windows are exempt from SHGC requirements.Adding Section R403.5.5 Solar water heating. Section R403.5.5 is added to read:R403.5.5 Solar water heating. Solar water heating systems are required for new single-family residential construction pursuant to Section 196-6.5, HRS.Adding Section R403.6.2 Ceiling fans. Section R403.6.2 is added to read:R403.6.2 Ceiling fans. A ceiling fan, rough-in or whole house fan is provided for bedrooms and the largest space that is not used as a bedroom, provided that the whole house mechanical ventilation system complies with the requirements of Table R403.6.1.Adding SECTION R407 POINTS OPTION. SECTION R407 is added to read:SECTION R407POINTS OPTIONR407.1 General (Prescriptive). Above-grade walls and roof/ceiling assemblies are permitted to comply with the points option as an alternative to complying with Section R401.2.1 and R402.2.2.R407.2 Requirements. One or more efficiency measures shall be selected for roof/ceiling and above-grade wall systems from Table R407.1 that cumulatively equal or exceed 0 (zero) points.As an alternative above-grade walls and roof/ceilings are permitted to comply separately by scoring 0 (zero) or greater.TABLE R407.1POINTS OPTIONWallsStandard Home PointsTropical Home PointsWood FramedR-13 Cavity Wall Insulation01R-19 Roof/ceiling Insulation-10R-19 Roof/ceiling Insulation + Cool roof membrane or Radiant Barrier301R-19 roof/ceiling Insulation + Attic Venting201R-30 Roof/ceiling Insulation01R-13 Wall Insulation + high reflectance walls412R-13 Wall insulation + 90% high efficacy lighting and Energy Star Appliances512R-13 Wall Insulation + exterior shading wpf= 0 3612Ductless Air Conditioner111.071 X Federal Minimum SEER for Air Conditioner111.142 X Federal Minimum SEER for Air Conditioner22No air conditioning installedNot applicable2House floor area ≤ 1,000 ft211House floor area ≥ 2,500 ft2-1-1Energy Star Fans811Install 1 kW or greater of solar electric11Metal FramedR-13 + R-3 Wall Insulation01R-13 Cavity Wall Insulation + R-0-10R-13 Wall Insulation - high reflectance walls401R-13 Wall Insulation + 90% high efficacy lighting and Energy Star Appliances512R-13 Wall Insulation + exterior shading wpf=0.3601R-30 Roof/ceiling Insulation01R-19 Roof/ceiling Insulation-10R-19 + Cool roof membrane1 or Radiant Barrier301R-19 Roof/ceiling Insulation + Attic Venting201Ductless Air Conditioner7111.071 X Federal Minimum SEER for Air Conditioner111.142 X Federal Minimum SEER for Air Conditioner22No air conditioning installedNot applicable2House floor area ≤ 1,000 ft211House floor area ≥ 2,500 ft2-1-1Energy Star Fans811Install 1 kW or greater of solar electric11Mass WallsR — 3/4 Wall Insulation01R-0 Wall Insulation-10R-0 Wall Insulation + high reflectance walls401R-0 Wall Insulation + 90% high efficacy lighting and Energy Star Appliances512R-0 Wall Insulation + exterior shading wpf=0.3601R-19 Roof/ceiling Insulation-10R-19 Roof/ceiling Insulation + Cool roof membrane1 or Radiant Barrier301R-19 Roof Insulation + Attic Venting01R-30 Roof Insulation01Ductless Air Conditioner7111.071 X Federal Minimum SEER for Air Conditioner111.142 X Federal Minimum SEER for Air Conditioner22No air conditioning installedNot applicable2House floor area ≤ 1000 ft211House floor area ≥ 2,500 ft2-1-1Energy Star Fans811Install 1 kW or greater of solar electric11Cool roof with 3-year aged solar reflectance of 0.55 and 3-year aged thermal emittance of 0.75 or 3-year aged solar reflectance index of 64.One cfm/ft2 attic venting.Radiant barrier shall have an emissivity of no greater than 0.05 as tested in accordance with ASTM E-408. The radiant barrier shall be installed in accordance with the manufacturer's installation instructions.Walls with covering with a reflectance of ≥ 0.64.Energy Star rated appliances include refrigerators, dishwashers, and clothes washers and must be installed for the Certificate of Occupancy.The wall projection factor is equal to the horizontal distance from the surface of the wall to the farthest most point of the overhang divided by the vertical distance from the first floor level to the bottom most point of the overhang.All air conditioning systems in the house must be ductless to qualify for this credit.Install ceiling fans or whole house fans in all bedrooms and the largest space that is not used as a bedroom.Amending Section R501.4 Compliance. Section R501.4 is amended to read:R501.4 Compliance. Alterations, repairs, additions and changes of occupancy to, or relocation of, existing buildings and structures shall comply with the provisions and regulations for alterations, repairs, additions and changes of occupancy or relocation, as adopted by the authorities having jurisdiction.Amending Section R503.1.1 Building envelope. Section R503.1.1 amends the Exception to read:Exception: The following alterations shall not be required to comply with the requirements for new construction provided that the energy use of the building is not increased:1.Storm windows installed over existing fenestration.2.Existing ceiling, wall or floor cavities exposed during construction provided that these cavities are filled with insulation.3.Construction where the existing roof, wall or floor cavity is not exposed.4.Roof re-cover.5.Roofs without insulation in the cavity and where the sheathing or insulation is exposed during a roof replacement shall meet one of the following:1.R-30 cavity insulation or the cool roof requirements in Section C402.3 for residential buildings.2.R-19 cavity insulation or the cool roof requirements in Section C402.3 for Tropical Zone residential buildings.3.When uninsulated roof sheathing is exposed during alteration, at least two of the following must be installed:a.Energy Star compliant roof covering;b.Radiant barrier;c.Attic ventilation via solar attic fans or ridge ventilation of gable ventilation; ord.A minimum of one exception listed in C402.3.6.Surface-applied window film installed on existing single pane fenestration assemblies to reduce solar heat gain provided that the code does not require the glazing or fenestration assembly to be replaced.Footnote to exception: Shake roofs on battens must be replaced with materials that result in equal or improved energy efficiency.Amending Section R503.2 Change in space conditioning. Section R503.2 is amended to read:R503.2 Change in space conditioning. Any nonconditioned or low-energy space that is altered to become conditioned space shall be required to be brought into full compliance with this code.Exceptions:1.Where the simulated performance option in Section R405 is used to comply with this Section, the annual energy cost of the proposed design is permitted to be one hundred ten percent (110%) of the annual energy cost otherwise allowed by Section R405.3.2.Split air conditioner systems where the cost to bring the space into full compliance with this code exceeds a five-year payback period based on the additional energy costs of the added space conditioning system. This exemption is subject to use of a split air conditioner system with a SEER rating in the top twenty-five percent (25%) of readily available units."